Mobile app development for iOS and Android
Apps people keep using, built with React Native, Expo and Swift, from the first screen to the store release.
What we build
We build the whole app, not only its screens: accounts, payments, notifications, the backend it talks to and the release that puts it in the stores.
Our apps are live on the App Store and Google Play. iMed runs fifty screens in English and Arabic. Bruno Arco Fitness syncs with Apple Watch. Redify has been built and maintained by us since 2020.
New apps, start to store
From design to release: screens, navigation, accounts, payments, notifications and the store listing.
React Native and Expo
One codebase for iOS and Android, with native performance where it matters.
Native modules
Native code when the app needs something the framework does not give, such as a device SDK or a wearable.
Device features
Camera and barcode scanning, maps, health data, push notifications and Apple Watch sync.
Store releases
App Store and Google Play submissions, review fixes and over-the-air updates after launch.
Upgrades and migrations
React Native new architecture, Expo SDK upgrades and moves from older codebases, without stopping releases.
How we work
The same four steps on every project, whatever its size.
Understand
You tell us what you are building and who it is for. We ask the questions that decide the design before any code is written.
Plan
We reply with how we would build it: the parts, the order, the risks we already see and what it would take.
Build
One senior team designs, writes and reviews the work in house. You see it running as it grows, not at the end.
Care
After launch we keep it healthy with upgrades, monitoring and security reviews, for as long as you need us.
Built with
- React Native
- Expo
- TypeScript
- Swift
- Redux
- Zustand
- React Query
- Firebase
- Supabase
Related work
Projects where this is the work we did.
iMed
Nurses, lab tests and IV therapy at home, booked from the phone. Fifty screens in English and Arabic, with the whole platform behind them.
Townie Sports
The sports app for Boston fans. An AI-generated audio recap every morning, then live scores, schedules, standings and local news for the Red Sox, Celtics, Bruins and Patriots.
Bruno Arco Fitness
The training app of a fitness coach. Personal routines, a nutrition plan with recipes and a shopping list, and progress tracking sit in one place, synced with Apple Watch.
YourTour
Tour management for artists and their crews. Tour dates, daily schedules, hotels and travel sit in one app, so everyone on the road knows where to be and when.
Flexspeak AAC
A communication app for people who cannot speak or find speaking difficult. Tap words and symbols to build a sentence and the app says it aloud. We built the app's screens from a complex custom design.
Redify
Scan a barcode or photograph a label and see the toxic ingredients inside, with safer products suggested instead.
What clients say
Written by clients, in their own words.
Read all 94 reviews
United StatesMudassir was exceptional to work with from start to finish. He asked all the right questions before writing a single line of code, flagged technical issues proactively before they became problems, and communicated clearly throughout the entire process. His knowledge of React Native, Firebase, and API integrations is genuine — not just claimed. Highly recommend for any complex iOS build.
United StatesVery happy with his work. I had a complex design concept but the seller was able to build it out and provide a quality delivery. Front-end development is definitely his strength, so we plan to work with him again in the future.
United StatesI recently worked on a mobile app project and was thoroughly impressed with their service. They were incredibly responsive and always timely with their updates and deliverables. Their attention to detail and commitment to meeting our needs were evident throughout the entire process. The front end of the app turned out beautifully, showcasing their expertise in design and user experience. I highly recommend them for anyone looking to develop a high-quality, visually appealing app.
Questions
Do you build for both iOS and Android?
Yes. With React Native and Expo one codebase serves both platforms, and we write native code where an app needs it.
Can you take over an app that is already live?
Yes. A large part of our work is on apps that are already in the stores: fixing, upgrading and extending them.
Do you handle the App Store and Google Play release?
Yes. We prepare the builds and listings, submit them, and fix what review sends back.
How do we start?
Send us a few lines about what you are building. We reply with how we would build it and what it would take.
Tell us what you are building.
A few lines are enough. We reply with how we would build it and what it would take.