Calda🐙 is an award-winning mobile and web app development studio and the #1 FlutterFlow Agency of the Year (2025). We design and build high-quality, scalable applications for startups and established companies across the USA, Europe, and the UAE.
We don’t just move fast—we build with precision: clean architecture, reliable backends, and products users genuinely enjoy.
Our Work
We’ve partnered with brands like Subway, MobioT, Superplan, BTV, and the official FlutterFlow Developer Conference app. Our experience spans:
FinTech | Automotive | HealthTech | E-commerce | Real Estate | Media | Food & Beverage | Sports & Fitness
Our Expertise
Mobile & Web App Development (iOS, Android, cross-platform)
Certified ✅ in FlutterFlow, Supabase, Stripe, and RevenueCat.
Why Calda
FlutterFlow Agency of the Year 2025
App Design of the Year (FFDC ’24)
Clutch Global Award Winner (Fall 2024)
4.9/5 rating across 100+ delivered projects
Leading certified FlutterFlow and Supabase agency
100% in-house team, no outsourcing
Full source code and data ownership
Project kickoff within 48 hours
Ongoing post-launch support
Our team of 35 designers, developers, QA engineers, and project managers works fully in-house—ensuring consistency, speed, and accountability from concept to launch and beyond.
Have an app idea? Get a free project estimate at https://www.thecalda.com/book-a-call
Min project size
$10,000+
Hourly rate
$50 - $99 / hr
Employees
10 - 49
Locations
Ljubljana, Slovenia
Year founded
Founded 2022
1 Locations
Ljubljana , Slovenia
No have been added yet...
Pricing Snapshot
Min. project size
$10,000+
Avg. hourly rate
$50 - $99
/hr
Rating for cost
4.9
/5
What Clients Have Said
Calda is praised for their good value and budget-friendly pricing, delivering quality MVPs and apps across various sectors. Clients consistently highlight their responsiveness and commitment, with projects ranging from mobile apps to complex backend systems, all completed on time and within budget.
Clients appreciate Calda's creative input and their collaborative approach to projects, often going beyond initial expectations to improve design and functionality. Their enthusiasm and partnership mindset are frequently highlighted.
High Client Satisfaction
Overall client feedback is overwhelmingly positive, with many expressing satisfaction with the final product and the overall project experience. Calda's ability to meet client expectations is a recurring theme.
Cost-Effective Solutions
Many clients find Calda's services to be of great value, offering high-quality deliverables at a reasonable cost. Their pricing is often a key factor in selecting them over competitors.
Strong Project Management
Calda's project management is highly regarded, with clients noting their responsiveness, timely delivery, and structured communication. Many clients highlighted their ability to meet deadlines and adapt to evolving project needs effectively.
Areas for Improvement in Communication Details
While communication is generally praised, one client mentioned that the level of detail in communication could be improved, possibly due to language barriers. This suggests an area where Calda could enhance clarity.
Expertise in App Development
Calda is consistently praised for its proficiency in developing mobile apps, utilizing tools like FlutterFlow and Supabase. Clients from various industries appreciate their technical skills and ability to deliver functional MVPs tailored to client needs.
A dinner planning app company hired Calda to help make their mobile app more flexible for end users. The team developed features such as dietary preferences, meal saving, and recipe search functionalities.
The client was pleased with Calda's work. The team managed the project well and was driven to make the project succeed for the client. Moreover, their professional approach was highly commendable. Overall, the engagement was successful.
The client submitted this review online.
BACKGROUND
Please describe your company and position.
I am the Founder of The Dinner App
Describe what your company does in a single sentence.
Dinner Planning App
OPPORTUNITY / CHALLENGE
What specific goals or objectives did you hire Calda to accomplish?
Make the app more flexible for users
Make it easier for me to update and manage the app
Make recipes dynamic
SOLUTION
How did you find Calda?
Referral
Why did you select Calda over others?
Referred to me
How many teammates from Calda were assigned to this project?
6-10 Employees
Describe the scope of work in detail. Please include a summary of key deliverables.
Swap meals
Input dietary preferences
See versions of each meal - e.g. DF, GF, Vegetarian etc.
Save meals they like
Search for old recipes
Edit their shopping list across devices - e.g. partners can both edit the shopping list.
RESULTS & FEEDBACK
What were the measurable outcomes from the project that demonstrate progress or success?
Swap meals
Dietary preferences
Save and edit meals
Describe their project management. Did they deliver items on time? How did they respond to your needs?
Ver
What was your primary form of communication with Calda?
Virtual Meeting
Email or Messaging App
What did you find most impressive or unique about this company?
Driven to succeed for their clients. They're a hungry startup and keen to learn. Professional approach. True partners.
Are there any areas for improvement or something Calda could have done differently?
Upfront project scoping should include the broader team so everyone is across the project.
RATINGS
5.0
Quality
5.0
Service & Deliverables
Schedule
3.5
On time / deadlines
Cost
5.0
Value / within estimates
Willing to Refer
5.0
NPS
MVP Development for CRM Software Provider
Custom Software DevelopmentUX/UI Design
Less than $10,000
Jan. - Mar. 2023
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0
"Their responsiveness and professionalism were impressive."
Apr 5, 2023
CEO, mindOS
Gabriele Morace
Other industries
Spain
1-10 Employees
Online Review
Calda built a CRM software provider's MVP using WeWeb and Supabase. They designed and implemented the wireframes.
Calda delivered the outputs on time. Their team was responsive and professional, which impressed the client. The vendor also ensured daily communication through email and messaging apps and led a final overview of the deliverables with a feedback session.
The client submitted this review online.
BACKGROUND
Please describe your company and position.
I am the CEO of mindOS
Describe what your company does in a single sentence.
Personal CRM
OPPORTUNITY / CHALLENGE
What specific goals or objectives did you hire Calda to accomplish?
Build MVP
SOLUTION
How did you find Calda?
Referral
Why did you select Calda over others?
Pricing fit our budget
Referred to me
How many teammates from Calda were assigned to this project?
2-5 Employees
Describe the scope of work in detail. Please include a summary of key deliverables.
Wireframes for MVP
MVP build on weweb and supabase
RESULTS & FEEDBACK
What were the measurable outcomes from the project that demonstrate progress or success?
Day to day contact and final overview of delivery with feedback session.
Describe their project management. Did they deliver items on time? How did they respond to your needs?
Yes both on time and responded at all times.
What was your primary form of communication with Calda?
Email or Messaging App
What did you find most impressive or unique about this company?
Their responsiveness and professionalism were impressive.
Are there any areas for improvement or something Calda could have done differently?
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