Semaphore Mobile is a Dallas-based software development firm specializing in custom web, mobile, AI, and IoT solutions. Since 2002, we’ve helped companies design and build scalable digital products that solve real business problems, from consumer-facing mobile apps to complex internal platforms and connected device ecosystems.
We’ve developed hundreds of applications across iOS, Android, web, and embedded systems, working with startups, mid-sized businesses, and enterprise teams alike. Our work has been featured by Apple and includes high-usage applications across multiple industries.
Today, we focus on building modern, scalable systems that combine intuitive user experiences with strong backend infrastructure, often integrating AI, real-time data, and connected hardware.
Our Services
Mobile App Development
End-to-end iOS and Android development using modern frameworks like React Native. From product strategy and UX to deployment and long-term scaling.
Web Application Development
Custom platforms, dashboards, and internal tools built for performance and scalability. Ideal for operational systems, marketplaces, and data-driven applications.
AI-Powered Solutions
We design and implement practical AI features, including LLM integrations, automation tools, and intelligent workflows that improve user experience and business efficiency.
IoT Development
Full-stack IoT solutions connecting hardware, sensors, and cloud infrastructure. We specialize in systems that collect, process, and visualize real-world data.
UI/UX Design
A design-first approach that defines product functionality before development begins, reducing risk and improving clarity.
Ongoing Support & Maintenance
We partner long-term to ensure your product evolves with your business, technology, and users.
Semaphore Mobile offers competitive pricing with projects ranging from $7,000 to $100,000. Clients appreciate their value for cost, effective communication, and project management, often citing excellent results and timely delivery.
While overall feedback is positive, one client suggested that more frequent consultative meetings could enhance the project experience, allowing for better alignment and idea exchange.
Strong Project Management Skills
Semaphore Mobile consistently demonstrates excellent project management, keeping clients updated and adapting to feedback promptly. Clients appreciate their ability to manage complex projects efficiently and meet deadlines.
Client-Centric Approach
The company is recognized for genuinely caring about client success, taking an interest in client ideas, and being more than just order-takers. Clients feel valued and supported.
High-Quality Deliverables
Clients report satisfaction with the quality of products delivered by Semaphore Mobile, noting that their projects meet or exceed expectations. This includes successful app launches and enhancements.
Technical Expertise
Clients commend Semaphore Mobile for their deep technical knowledge and expertise across various platforms, including mobile app development and backend systems.
Effective Communication
Semaphore Mobile is praised for their communication skills, maintaining consistent updates and being responsive to client needs. They engage in meaningful discussions to ensure project alignment.
"Hire Semaphore — they really care about the product and the process."
Jan 20, 2021
Founder, Avvee LLC
Christina Vela
Verified
Other industries
Dallas, Texas
1-10 Employees
Phone Interview
Verified
Semaphore was contracted to build an iOS gift-giving mobile app. The team managed the project from start to finish, adding a range of features and functionalities.
The app, which is now live, is functioning well and has pleased internal stakeholders. Throughout the engagement, the team was a reliable and informative resource who pushed the project along and kept the product’s best interests in mind. Customers can expect a talented, effective partner.
A Clutch analyst personally interviewed this
client over the phone. Below is an edited
transcript.
BACKGROUND
Introduce your business and what you do there.
I’m the CEO and owner of Avvee, LLC. I own the app Wrapt, a gift-giving app.
OPPORTUNITY / CHALLENGE
What challenge were you trying to address with Semaphore Mobile?
I needed a development team that could build the mobile app I wanted.
SOLUTION
What was the scope of their involvement?
I had no experience with building an app, and Semaphore was able to break down and walk me through the process from start to finish. The team provided me with direction as far as timelines and other necessary information.
One of the key features is the categorization of each element, like different holidays. The main feature is that users can send anyone a photo, and to reveal the photo, the recipient rubs off the overlay we installed. The app is built for iOS.
What is the team composition?
I work with three people in total. Eric (CEO) kept in great contact with me, helping communicate progress along the way. Renee (Project Manager) provided timelines and updates on day-to-day progress. Jeff (Director of Software Development) is more on the technical side of things — if I have questions about features or functionalities, I go to him.
How did you come to work with Semaphore Mobile?
I spoke to a few vendors, but Eric was really genuine as far as his concern, feedback, and how he spoke to me. He was very sincere and humble, and an overall great professional. Any information I requested, he provided promptly. It was clear Semaphore was the company that I wanted to work with.
How much have you invested with them?
We’ve spent roughly $23,000–$24,000.
What is the status of this engagement?
We’ve been working together since June 2019. We went live in December, but we’re still working together to make changes and updates.
RESULTS & FEEDBACK
What evidence can you share that demonstrates the impact of the engagement?
The success of the project is very high. Semaphore developed everything I asked for, and they worked with me throughout the entire project. On a scale of one to 10, I would give Semaphore a 10.
The quality of their work is outstanding. They’re professional and the results are great overall.
How did Semaphore Mobile perform from a project management standpoint?
Semaphore did very well. Communication was great, and they kept me apprised of any changes. Their timelines were always met, and there was never a lapse if adjustments would have to be made. We used a project management app to keep track of tasks.
What did you find most impressive about them?
Their communication was one of the best aspects of working with them. I was also impressed with Semaphore’s overall knowledge of the project.
Are there any areas they could improve?
I don’t think they could’ve done anything differently. If I ever had issues, it wasn’t because of a lack of service on their part.
Do you have any advice for potential customers?
Hire Semaphore — they really care about the product and the process. Even after you have your app developed, they’ll continue to work with you and make updates. I would highly recommend them, especially for people like me who don’t have a lot of experience.
RATINGS
5.0
Quality
5.0
Service & Deliverables
Schedule
4.5
On time / deadlines
Cost
5.0
Value / within estimates
Willing to Refer
5.0
NPS
Alexa Application Development for an Innovations Product Company
Custom Software Development
Confidential
Aug. 2017 - Jan. 2019
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0
“They worked all hours of the day or night, and we couldn’t have achieved our goals without them.”
Jan 29, 2019
President, Idea Planet
Michael Flecker
Verified
Advertising & marketing
Dallas, Texas
11-50 Employees
Phone Interview
Verified
Semaphore Mobile created a cross-platform system for web, iOS, and Android from scratch that shuttles data between users and Amazon’s Alexa Voice Service.
Implementation ran smoothly, and the product operates well and is well-received. Semaphore Mobile was communicative and diligent, ensuring a successful collaboration. They had a global understanding of the project goals and were strong project managers.
A Clutch analyst personally interviewed this
client over the phone. Below is an edited
transcript.
BACKGROUND
Introduce your business and what you do there.
I’m the president of an innovation product company.
OPPORTUNITY / CHALLENGE
What challenge were you trying to address with Semaphore Mobile?
We needed a software platform to work with a product we were developing for Amazon.
SOLUTION
What was the scope of their involvement?
They created the platform from scratch. It was a web and mobile application for iOS and Android, and they integrated everything into the chips that we use for the project. The product interacts with Amazon's Alexa, so it's a cross-platform system between Amazon and our clients to deliver information back through our product. The entire project is unique in our industry.
What is the team composition?
We worked with a team of three, and our main point of contact was one of their company heads.
How did you come to work with Semaphore Mobile?
We interviewed a number of companies. Semaphore's depth of understanding and overall grasp of the total project was very impressive. Ultimately, that's why we selected him.
What is the status of this engagement?
We started in 2017 and worked into 2018. We had a five-month development period before we fully deployed.
RESULTS & FEEDBACK
What evidence can you share that demonstrates the impact of the engagement?
Our main markers for the project were implementation and a successful rate of functionality. The product operates well and we've received positive comments from users.
How did Semaphore Mobile perform from a project management standpoint?
Their project management was particularly strong, and they did extremely well throughout the process. Most of our communication was through in-person meetings and email. We also shared links to documents and other parts of the project.
What did you find most impressive about them?
Their global understanding of our mission and their ability to see the project through to fruition both stood out.
Are there any areas they could improve?
They’re great, and I really don’t have anything they could change. They worked all hours of the day or night, and we couldn’t have achieved our goals without them.
Do you have any advice for potential customers?
Spend the time you need at the beginning of your project and collectively develop your expectations.
RATINGS
5.0
Quality
5.0
Service & Deliverables
Schedule
5.0
On time / deadlines
Cost
5.0
Value / within estimates
"They offered competitive pricing."
Willing to Refer
5.0
NPS
E-Commerce Site Development for Software Company
Custom Software Development
$10,000 to $49,999
Jan. - Nov. 2018
5.0
Quality
4.5
Schedule
5.0
Cost
5.0
Willing to Refer
5.0
“They stand out just by being straightforward.”
Jan 28, 2019
Managing Member, Software Company
Mark
Verified
Other industries
Birmingham, Alabama
11-50 Employees
Phone Interview
Verified
Semaphore Mobile built e-commerce features for a web-based platform, including quotation and order fulfillment functionality. They used Ruby on Rails and JavaScript.
Semaphore Mobile effectively integrated weekly feedback into code improvements, allowing them to meet strict industry standards. They quickly resolved any issues that came up, thanks to their straightforward communication and integrity.
A Clutch analyst personally interviewed this
client over the phone. Below is an edited
transcript.
BACKGROUND
Introduce your business and what you do there.
We’re a software development company focused on building an e-commerce product.
OPPORTUNITY / CHALLENGE
What challenge were you trying to address with Semaphore?
We didn’t have the required on-site staff to develop new features for our web-based platform.
SOLUTION
What was the scope of their involvement?
Semaphore worked on several features, including a quotation system and order fulfillment functionality. They used Ruby on Rails and JavaScript. They did not provide any frontend design.
What is the team composition?
Semaphore assigned three senior developers and a project manager (PM). An architect was also available. We didn’t really need the PM, as we could manage our own staff.
How did you come to work with Semaphore?
I found them online and gave them a call. I started a conversation with Eric (Owner, Semaphore Mobile), and we hit it off. We kept in touch over time, and I reached out to them when I needed help.
How much have you invested with them?
The cost of their work was around $20,000.
What is the status of this engagement?
We worked with Semaphore from January–November 2018. The application is fully deployed.
RESULTS & FEEDBACK
What evidence can you share that demonstrates the impact of the engagement?
We tracked their quality through a weekly code review. It took us a few reviews to let them know how we wanted things to be done, but this is to be expected with every project. Once we got past this, they were able to meet our standards.
How did Semaphore perform from a project management standpoint?
It was pretty great. We shipped code quickly, with the average deployment time being two weeks. Our main forms of communication were phone and email. We also had Skype meetings when needed. They responded well to our feedback.
What did you find most impressive about them?
We sometimes get the bait-and-switch with development companies, but I never saw that happen with Semaphore. They stand out just by being straightforward.
Are there any areas they could improve?
They addressed all the issues that I brought up.
Do you have any advice for future clients of theirs?
It’s always wise to know exactly what you want before engaging a development company.
RATINGS
5.0
"It was a great experience."
Quality
4.5
Service & Deliverables
Schedule
5.0
On time / deadlines
"They were quite responsive."
Cost
5.0
Value / within estimates
Willing to Refer
5.0
NPS
"I’ve recommended them to several people already.
Mobile App Dev for Pivot Monitoring Company
Mobile App DevelopmentUX/UI Design
Confidential
Jan. 2022 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0
"The team has consistently proven to be available and helpful."
Feb 5, 2024
Senior Programmer Analyst, PivoTrac Monitoring
Anonymous
Verified
Other industries
Dalhart, Texas
1-10 Employees
Online Review
Verified
A pivot monitoring app has hired Semaphore Mobile for mobile app development. The team worked with the client's backend team to improve the UX and add new features to the application.
Semaphore Mobile has successfully addressed the client's app development needs, resulting in great client response. Semaphore Mobile's team is proactive with suggestions and responsive via email. The client praises the team's rapid delivery of feature requests and helpful consistency of work.
The client submitted this review online.
BACKGROUND
Please describe your company and position.
I am the Senior Programmer analyst of PivoTrac Monitoring
Describe what your company does in a single sentence.
We are a pivot monitoring company. We provide control and monitoring solutions for growers that use center pivot irrigation systems.
OPPORTUNITY / CHALLENGE
What specific goals or objectives did you hire Semaphore Mobile to accomplish?
Take over app development
Continue to improve the app with new features
SOLUTION
How did you find Semaphore Mobile?
Online Search
Why did you select Semaphore Mobile over others?
Close to my geographic location
The team connected with our vision very well
How many teammates from Semaphore Mobile were assigned to this project?
2-5 Employees
Describe the scope of work in detail. Please include a summary of key deliverables.
We had an app built by our local team. However, development had come to a stand-still due to lack of manpower. We enlisted Semaphore Mobile to take over the app development from where the code existed. This required a major update due to the age of the application. After the first release that brought the app up to date, Semaphore has been working with our back-end team to develop and release new builds to our clients to improve the user experience and to add features to the application.
RESULTS & FEEDBACK
What were the measurable outcomes from the project that demonstrate progress or success?
The re-write of the app libraries and UI was a complete success. All bugs were mitigated before release to the public. Client response the updated version of the app was very positive. Since the first release, there have been 2 newer releases, including some new features and performance and security improvements. These releases have been extremely positively received as well.
Describe their project management. Did they deliver items on time? How did they respond to your needs?
Semaphore has been very agile in its responses to our update requests, and bug submissions. They have even provided several solution suggestions to our back-end team when requested.
What was your primary form of communication with Semaphore Mobile?
Email or Messaging App
What did you find most impressive or unique about this company?
The greatest thing about working with Semaphore has been the very rapid delivery of feature requests, system improvements, and UI updates. The team at Semaphore has been very "on hand" to discuss changes as they evolve and have demonstrated that they are very enthusiastic about our product and services. Questions that come up are always answered very quickly and clearly. The team has consistently proven to be available and helpful.
Are there any areas for improvement or something Semaphore Mobile could have done differently?
If there are, I am not aware of them.
RATINGS
5.0
"I have been very pleased with Semaphore and will look to their continued service as our product evolves"
Quality
5.0
Service & Deliverables
"Everything has made it to our clients without trouble."
Schedule
5.0
On time / deadlines
"We do not find ourselves waiting."
Cost
5.0
Value / within estimates
"Semaphore is very competitive in value / expense ratio"
Willing to Refer
5.0
NPS
"These folks have just done a great job for us. I would recommend them to anyone.
Mobile App Development for Agriculture Co
Marketing StrategyMobile App Development
$10,000 to $49,999
Sep. 2024 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0
"They are very attentive and timely."
Jan 31, 2024
Executive, Jd Todd LLC
Anonymous
Other industries
Norman, Oklahoma
Online Review
An agriculture company has hired Semaphore Mobile for mobile app development. The team has taken care of planning and documentation for user stories, design and development, and testing and deployment.
Semaphore Mobile delivered a functional app with complex functionalities. Semaphore Mobile's team is responsive to implementing feedback, attentive, timely, and proactive with suggestions. The client praises the team's trustworthy guidance and expertise.
The client submitted this review online.
BACKGROUND
Please describe your company and position.
I am an executive at Jd Todd LLC
Describe what your company does in a single sentence.
Small scale agricultural based App development
OPPORTUNITY / CHALLENGE
What specific goals or objectives did you hire Semaphore Mobile to accomplish?
Help define the concept and capabilities of the App
Maintain a cost expenditure vs expected outcome thru development
Weekly progress and status updates
SOLUTION
How did you find Semaphore Mobile?
Online Search
Why did you select Semaphore Mobile over others?
High ratings
Close to my geographic location
Pricing fit our budget
Great culture fit
Good value for cost
Company values aligned
How many teammates from Semaphore Mobile were assigned to this project?
2-5 Employees
Describe the scope of work in detail. Please include a summary of key deliverables.
Planning and Documentation, user stories and technical specs
Design and Development
Testing and Deployment
RESULTS & FEEDBACK
What were the measurable outcomes from the project that demonstrate progress or success?
Semaphore delivered a complex and functional App. It implemented progressive changes promptly, and is providing feedback and guidance on continued development.
Describe their project management. Did they deliver items on time? How did they respond to your needs?
Project management was/is superb. They are very attentive and timely, they are focused on my definitions of success, are extremely proactive with suggestions, and helped balance dollar investment versus capability.
What was your primary form of communication with Semaphore Mobile?
Virtual Meeting
Email or Messaging App
What did you find most impressive or unique about this company?
Eric S is the owner, he is very responsive any time I call. Semaphore Mobile has done a great job; I trust their guidance through this project with a very high degree of confidence.
Are there any areas for improvement or something Semaphore Mobile could have done differently?
None
RATINGS
5.0
"Very pleased overall"
Quality
5.0
Service & Deliverables
"Technically excellent and very personable"
Schedule
5.0
On time / deadlines
"100% reliable"
Cost
5.0
Value / within estimates
"Cost of development versus expected outcome"
Willing to Refer
5.0
NPS
"I’m highly confident others will have a similar, great experience
Web & Mobile App Development for Business Analytics Company
Application Management & SupportCustom Software DevelopmentEnterprise App ModernizationMobile App Development
Confidential
Aug. 2022 - June 2023
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0
"We were impressed with their ability to creatively solve our unique problems quickly."
Jun 29, 2023
Director, Athena Intelligence Group
Anonymous
Other industries
Washington, District of Columbia
11-50 Employees
Online Review
A business analytics company hired Semaphore Mobile to build a two-factor authentication app for iOS, Android, and web platforms.
Semaphore Mobile delivered the project on time and according to the client's specifications. The team's responsiveness and clear and consistent communication made them a reliable partner. Above all, they were incredibly creative and accommodating of the client's requests and needs.
The client submitted this review online.
BACKGROUND
Please describe your company and position.
I am the Director of Athena Intelligence Group
Describe what your company does in a single sentence.
Our company specializes in providing Business Analytics for our clients.
OPPORTUNITY / CHALLENGE
What specific goals or objectives did you hire Semaphore Mobile to accomplish?
We were looking for a two-factor authentication solution that provided expanded capabilities.
SOLUTION
How did you find Semaphore Mobile?
Referral
Why did you select Semaphore Mobile over others?
High ratings
Pricing fit our budget
Great culture fit
Referred to me
How many teammates from Semaphore Mobile were assigned to this project?
2-5 Employees
Describe the scope of work in detail. Please include a summary of key deliverables.
We were looking for a 2-factor authentication solution that provided expanded capabilities, and Semaphore Mobile provided an enhanced 2 factor authentication app for use on iOS, Android and Web platforms.
RESULTS & FEEDBACK
What were the measurable outcomes from the project that demonstrate progress or success?
A successfully launched 2 factor authentication app for use on iOS, Android and Web platforms.
Describe their project management. Did they deliver items on time? How did they respond to your needs?
Semaphore Mobile's timely delivery of our requests and immediacy in communication made them incredibly reliable to work with. They happily delivered on whatever need our company had, whenever we asked.
What was your primary form of communication with Semaphore Mobile?
Virtual Meeting
What did you find most impressive or unique about this company?
We were impressed with their ability to creatively solve our unique problems quickly and efficiently.
Are there any areas for improvement or something Semaphore Mobile could have done differently?
No.
RATINGS
5.0
Quality
5.0
Service & Deliverables
Schedule
5.0
On time / deadlines
Cost
5.0
Value / within estimates
Willing to Refer
5.0
NPS
Custom Software Development for SaaS Company
Custom Software Development
$50,000 to $199,999
Jan. 2021 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0
"I love the laid-back yet professional way the staff interacts with us. They are a joy to work with."
Feb 15, 2022
Technology Manager, SaaS Company
Anonymous
Verified
Other industries
West Monroe, Louisiana
1-10 Employees
Online Review
Verified
Semaphore Mobile was hired by a SaaS company to help resolve complex issues within their software. The team has delegated two developers to provide software development support for the client.
Semaphore Mobile has successfully addressed and resolved the issues, allowing for a successful partnership. They excellently handle their tasks and deliver work on time. They are professional, personable, and easy to work with.
The client submitted this review online.
BACKGROUND
Please describe your company and your position there.
I am the technology manager for our company.
OPPORTUNITY / CHALLENGE
For what projects/services did your company hire Semaphore Mobile, and what were your goals?
We needed help solving some complex issues with our software.
SOLUTION
How did you select this vendor and what were the deciding factors?
Semaphore Mobile had the people with the right skills to take care of our software development needs.
Describe the scope of work in detail, including the project steps, key deliverables, and technologies used.
We had issues that we had struggled with in-house but Semaphore Mobile was able to nail them down.
How many people from the vendor's team worked with you, and what were their positions?
We worked with two people.
RESULTS & FEEDBACK
Can you share any measurable outcomes of the project or general feedback about the deliverables?
Our project was a massive success.
Describe their project management style, including communication tools and timeliness.
They were very professional yet personable and easy to work with. They always met deadlines and were we had no issues with them.
What did you find most impressive or unique about this company?
I love the laid-back yet professional way the staff interacts with us. They are a joy to work with.
Are there any areas for improvement or something they could have done differently?
No, I do not see anything they need to improve.
RATINGS
5.0
Quality
5.0
Service & Deliverables
Schedule
5.0
On time / deadlines
Cost
5.0
Value / within estimates
Willing to Refer
5.0
NPS
Showing 11-17 of
17 Reviews
Our Story
Founded in 2002, Semaphore Mobile was the first mobile development firm in Texas, beginning in telecommunications and building systems for Nokia and BlackBerry. In 2007, ahead of the App Store launch, we built and launched Craigslist’s mobile app. Since then, our team has contributed to projects for GasBuddy, ACE Cash Express, Transamerica, Google, and more. Today, we continue to evolve with our clients, providing expert mobile, web, IoT, backend, QA, and design services.
Meet the Team
Eric SilverthornCEO
Eric brings deep technical leadership and decades of experience building software systems across mobile, web, IoT, and backend platforms. Since Semaphore Mobile’s early days, he has helped guide the company through major shifts in technology, from ea
Jeff OwensDirector of Technology
Jeff plays a key role in leading client strategy, project planning, and delivery at Semaphore Mobile. With a strong understanding of both business goals and technical execution, he helps clients clarify requirements, prioritize features, and move pro
Jonah SilverthornDirector of Sales and Operations
Jonah helps lead client relationships, sales, and project discovery for Semaphore Mobile. He works closely with clients to understand their goals, define project scope, and connect them with the right technical resources across mobile, web, IoT, back
What Sets Us Apart
20+ years of development experience
We are not just developers. We are product partners with 20+ years of experience turning complex ideas into real software. From early mobile systems to apps used by millions, we know how to guide strategy, design, development, QA, and launch with clarity and accountability.
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