Partnering to bring ideas to reality
Grey Chain is a specialised mobile app and web development firm with expertise in UI/UX, Agile & Devops based delivery. We partner with our clients throughout the product lifecycle from ideation to delivery of efficient and cost effective solutions.
Our core expertise is focussed on Mobile First, Cloud Native, Agile & DevOps.
Started in 2016, we have served global clients from US, UK, Germany, Belguim, Dubai, UAE & India which includes Enterprises & SMBs like SAGE Publishing, Hansons, Bose Professional, UNICEF, Harvard, Bill & Melinda Gates Foundation, FHI360 & UP Govt. & Gujarat Govt., International Rescue Committee (IRC), Innovations for Poverty Actions (IPA), UN- International Organisation for Migration (UN-IOM).
We are headquartered in US with a world class delivery centre in India with a Rapidly growing team of 90+ Resources targeted to be 200 people in 2023.
Key services
- Mobile, Cloud & DevOps Transformation
- Enterprise & Platforms Development
- IPhone/IOS, Android, Flutter & React Native app development
- Web development
- UX Research & UI Design Consulting
- Mobile DevOps
- IT Staff Augmentation

headquarters
other locations
Mobile App Dev for Home Improvement Company
the project
“They’ve solidified themselves as a top partner, and we plan to continue working together.“
the reviewer
the review
A Clutch analyst personally interviewed this client over the phone. Below is an edited transcript.
Introduce your business and what you do there.
I’m the CIO for a home improvement company; we sell roofing, siding, windows, gutters, and gutter protection services to homeowners in the US.
What challenge were you trying to address with Grey Chain?
We had faced delays with our mobile application while working with another service provider, so we engaged Grey Chain to build a functional sales enablement app. Our goal was to create a customized tool that provided our users with a consistent customer experience.
What was the scope of their involvement?
Grey Chain has supported us with mobile app development and UX/UI design initiatives. They started by conducting workshops and interviews with our team to gather the requirements. We also provided them with marketing materials to support the design process, including color schemes and logos.
Once they learned about our industry and business vernacular, they designed and built a new mobile application from scratch. They were responsible for creating designs, names, and icons for the new app. Since our existing app was built for iOS, the team also made the new version for iOS. We haven’t published it to the app store because it's proprietary.
The new version of our app is called HIRO, which stands for home improvement renovation options. Grey Chain built a CMS that organizes our product and pricing catalogs by market branch on the back end. They also embedded the app with all the capabilities a sales executive needs to sell a customer. The app holds measurements, product pricing, customer financing options, discounting functionality, and e-signature functionality. It also accommodates credit card payments for customers who want to submit deposits directly through the app.
Furthermore, Grey Chain integrated the app with APIs, which means that confirmed leads can reach our sales executives directly through the app. Our sales executives can access appointments and customer information via turn-by-turn navigation. Additionally, the app stores information from our call center regarding which products potential customers are interested in. They also embedded product presentations and videos within the app to provide potential customers with a consistent end-to-end flow.
Our sales executives used to bring boxes of product samples and literature to appointments, but the team digitized those resources and embedded them into the app. Furthermore, the app also features a leaderboard that enables sales executives to judge their performance against their peers. They can also use the filter views to review the past month or 90 days.
Now that we’ve launched the new version of the app, Grey Chain has been working on expanding the functionality. For example, we recently launched a bath and interior division, so they’ve scheduled a work stream to add those capabilities.
What is the team composition?
We’ve worked with 15 people from Grey Chain: four iOS teammates, four architecture and backend teammates, one dedicated testing resource, one design resource, three project management resources, and a PowerBI resource for reporting.
How did you come to work with Grey Chain?
We found them through a referral.
How much have you invested with them?
We’ve invested roughly $300,000 in the partnership.
What is the status of this engagement?
They won partner of the year for their work in 2022 and early 2023. 5⭐️ experience!!
What evidence can you share that demonstrates the impact of the engagement?
Grey Chain has significantly improved our mobile app's UX/UI design and flow. Our previous app lacked API capabilities, so it didn’t function how we needed it to. For example, when customers wanted to submit payments, they had to call our office, provide their credit card information, and wait for us to enter it into a system. Now, we can accommodate payments via the app, making the process seamless and clean.
Furthermore, the app has seen an outstanding internal adoption rate, facilitating 13 months of record sales performance and growth. Grey Chain’s efforts have entirely transformed our sales process without skipping a beat, which is a huge testament to them.
How did Grey Chain perform from a project management standpoint?
Grey Chain has been an outstanding partner throughout the development process, and we’ve built a phenomenal relationship. Although the team is offshore, they’re just a phone call away. They’ve gone above and beyond to support critical business disruptions, which we appreciate.
During the development phase, they organized work sprints around the UI and API layer. We used Excel and Jira to manage development tasks.
What did you find most impressive about them?
Grey Chain has talented designers with robust industry knowledge. Working with them has been easy, and I’ve been most impressed by their flexibility and warmth. They’ve solidified themselves as a top partner, and we plan to continue working together.
Are there any areas they could improve?
No, I’m 100% satisfied.
Do you have any advice for potential customers?
What are you waiting for, have a discusson!
Focus
Portfolio
UNICEF, Harvard, Bose Professional, International Rescue Committee, Innovations for Poverty Actions, Belgium Business Group

Integration Mobile App Analytics Panel for Data Research for Harvard Medical
Survey data and Firebase Analytics data is integrated in the app to be showcased in custom research & analytics panel for UNICEF & Harvard BIDMC.
Delivery Highlights:
- Google BigQuery Integration
- Custom ETL jobs for data imports
- Live data queries
- Custom UX based on research goals.

Bose Professional
Enterprise sales catalog for BOSE professional sales staff so that they can promote products through various distribution channels
Professional sound systems demand an uncommon expertise and specialized products. For more than 40 years, Bose Professional has developed innovative loudspeakers, electronics and software to meet the needs of demanding professional audio applications https://drive.google.com/file/d/1IBEe_XiJIU7IkLpDbO0UQULQo1Haemi9/view

Home Me - Real Estate Marketplace
HomeMe is a unique concept by a Real Estate Startup looking to disrupt the buy, sell and mortgage real estate space. It offers seamless access to thousands of listings in your neighborhood via a Google Maps based search and many filters to find the most suited property for yourself. With integrated Multi-Listing-Services (MLS) APIs, Real Estate listings appear in the HomeMe Platform with Real Geeks solutions. Users are able to apply for Mortgage and Pre-Approved loans using integrated Floify forms and APIs directly from the mobile interface. The system is end to end integrated with multiple 3rd party services to make a seamless UX for the end user.

UNICEF - GBV Pocket Guide
The GBV Pocket Guide App provides step-by-step guidance and tools to all humanitarian practitioners across all sectors on how to support survivors of gender-based violence (GBV) when there are no GBV services, referral pathways or focal points in your area. It uses global standards on providing basic support and information to survivors of GBV without doing further harm. The GBV Pocket Guide App provides key messages on how to support survivors; an interactive decision-tree to guide practitioners through what to do if someone shares their experience of violence; easy-to-read Do’s, Don’ts and sample scripts; and targeted guidance on child and adolescent survivors.
Android: https://play.google.com/store/apps/details?id=com.gbvpocketguide
iOS: https://apps.apple.com/us/app/gbv-pocket-guide/id1366576273

Fintech Platform for Share Wealth Systems
SWS - For Share Wealth System, a leading capital markets firm based out of Australia , we are delivering mobile application for market action alerts to the members, sourced from our investing methodologies. The new app also sync with the Window's based desktop software's portfolio manager capabilities. The application is for both Android and iOS platforms
iOS: https://apps.apple.com/us/app/sws-alerts-pm/id1567406384
Android: https://play.google.com/store/apps/details?id=com.swsalerts.app&hl=en_US&gl=US

Headero - Dating App for Everyone
Headero is a gender inclusive space for everyone. It is a community app which welcomes everyone and is joyful and positive. Along with the ability to connect with each other, the application also focuses on members safety by providing functionality to report abusive behavior or community violations.
https://apps.apple.com/app/id1508271825

Soum - eCommerce Bidding Platform
Soum is an English and Arabic eCommerce platform, it allows users to sell their second hand devices and users can bid on the device.
With fully integrated Hyperpay and Hyperpay Split, transactions are reserved in escrow and accordingly distributed to the respective parties.

ROSA (Remote Offered Skill Building)
The IRC responds to some of the world's worst crises, delivering aid that saves lives while paving the way for long-term recovery.
The Remote-Offered Skill Building App (Rosa) was designed to utilize technology and keep the content, community and continual skill building ongoing for staff working remotely, outside of traditional offices. Rosa provides key content on gender-based violence knowledge, case management, communication and attitude skills; offers self or supervisor-administered skills assessments; and a community space for users to expand their learning through facilitated remote discussions and distance supervision. https://play.google.com/store/apps/details?id=org.rescue.rosa

Video based Learning & Assessment Platform for Mobile & Web
Training software for both Mobile & Web for Institute of Ultrasound Training, India.
Cross platform services were deployed using technologies such as Angular, Node, MongoDB and Flutter.
Integration with Vimeo SDK allows secure video to be integrated with data privacy in mind.

leeveitwme.com
leeveitWme offers an on-demand platform, that allows individuals to offer their space and services, complemented with insurance, convenient payment channels, and the right support, providing low-cost, flexible, appropriate, secure and nearby solutions.
leeveitwme.com

AIACA
AIACA Android & iOS Apps built in Flutter, allows rural and urban Artisans & Craftworkers to access AIACA non-profit services via mobile apps. Users are able to apply for certifications, chat with AIACA team and make payments for various services.

True Scoop News
Native Android and iOS apps with a robust content and news publishing CMS, True Scoop News is a fast content delivery platform for real time entertainment & political news.

Padalapp - Innovation for Poverty Actions
Padalapp is a part of a research project ( for, Innovations for Poverty Action , IPA ) to determine the right purpose of remittances from off shore Filipino migrants to the recipients in Philippines.
https://itunes.apple.com/us/app/padalapp/id1336927164?ls=1&mt=8

Quik Catalog
Quik Catalog is the world’s fastest B2B & B2C promotions platform built for the Web, iOS and Android. Any global business can create photo based product catalogs in minutes and then invite their customers to the catalog.
B2B and B2C sales catalog builder for businesses to create catalog in minutes.
It allows potential to connect with suppliers via direct chat

LieferBar Restaurant IPad APP
German food ordering and delivery apps for restaurant owners to manage food order lifecycle.
IPad app for in restaurant order management with fully integrated notification for real time orders monitoring.
Build with integrated SDK's OneSignal for real time notifications and Thermal Printer for reciepts.

Basic Science Clinic
Basic Science Clinic runs a unique Primary exam preparation program and produce FOAMed content that addresses the essential physiological principles relevant to critical care primary examinations, and upon which scientifically informed management of critical illness is constructed.
Basic Science Clinic mobile app – a revision tool for ICU primary exams. The BSC app is designed to enable you to study on the go, and uses evidence based educational tools for optimising retention and recall.
https://itunes.apple.com/us/app/basic-science-clinic/id1317925324

UNICEF Oky - React Native
React Native App Development for UNICEF Thailand. Oky is a mobile app for girls (age 10+) that helps you to take control of your periods and your lives through a bit of fun!
With Oky adolescent girls can track how period affect body and mood.
Reviews
the project
Mobile App Dev for Matrimonial Agency
"They always kept an eye on the project."
the reviewer
the review
The client submitted this review online.
Please describe your company and your position there.
I'm the Founder & CEO of the Aarshi House Private limited. Bhagya Milan is the brand which deals in Matrimony. We hold the largest network of Matrimonial Agents in India.
For what projects/services did your company hire Grey Chain, and what were your goals?
We needed customer app & partner app both in Ios and Android, apart from that a Admin Panel/CRM to manage and a Website for showcase.
How did you select this vendor and what were the deciding factors?
We found them on clutch and gave them our requirements through mail like we did to 20 other developers. But they were the ones who gave us a genuine quote, committed the minimum time of work completion and were very generous and informative while understanding our products demands.
Describe the scope of work in detail, including the project steps, key deliverables, and technologies used.
They developed our matrimonial apps which is based on similar model like Urban Company which includes user and partner inter-relation.
How many people from the vendor's team worked with you, and what were their positions?
One of the owners were always the part of the discussion apart from him a Project Manager, 1 Senior & 1 Junior Developer for Backend, 1 Senior & 1 Junior Developer for Frontend & 1 Designer for website.
Can you share any measurable outcomes of the project or general feedback about the deliverables?
They were able to deliver most viable product in least time possible. We were able to operate by 1st week of November with our Android app ready for both user and vendor and Admin Panel to Support it. They delivered the website merely in 3 weeks time.
Describe their project management style, including communication tools and timeliness.
The project management was very smooth we communicated through WhatsApp Group and Trello. Their response was very quick.
What did you find most impressive or unique about this company?
They always kept an eye on the project. The project manager was always prompt even in non working hours or days. We never felt the need to directly contact the developer as the communication was clear enough.
Are there any areas for improvement or something they could have done differently?
Although they are far more ahead then many developers I have come in contact with but they can do slightly more improvement on testing products before submitting although they compensate well with quick bug fixes.
the project
App Dev for International Research Nonprofit
"Project goal of data collection was achieved."
the reviewer
the review
The client submitted this review online.
Please describe your company and your position there.
international research and policy non-profit in the field of international development.
For what projects/services did your company hire GreyChain Technologies?
We hired GreyChain to develop a mobile application to facilitate the data collection of a large scale research project about international remittances.
What were your goals for this project?
A mobile application, an admin panel that makes it easy to control app settings for different groups of users, continuous support and problem-shooting for two years.
How did you select this vendor?
Open bidding
Describe the project in detail.
Initial meetings for needs assessment and design; app development and testing through 3 pilots; finalization of app and continuous support for two years.
What was the team composition?
1 project manager who leads communication with us, 1 back end developer, several Android developer and IOS developers. I have to admit i do not remember the full team composition very well.
Can you share any outcomes from the project that demonstrate progress or success?
App ran for two years with minimal issue. Project goal of data collection was achieved.
How effective was the workflow between your team and theirs?
Effective.
What did you find most impressive about this company?
Good communication skills of the project manager. Willingness and ability to understand the client's business and needs.
Are there any areas for improvement?
More careful estimation of productivity and timeline.
Grey Chain has built a well-designed app for iOS users. Their efforts have facilitated a seamless sales process for the client’s team and customers, resulting in record sales performance over the past 13 months. The team’s industry knowledge and flexibility are hallmarks of the partnership.