Health & fitness app development
We design, build and operate health and fitness apps for consumer brands, coaches and gyms. We are not a generalist agency that took a fitness brief — health and fitness is our focus, and we run our own fitness product, UltraFit360, on the exact stack and process we bring to your project.
Start a conversationWhat's included
- Cross-platform iOS + Android apps from one React Native codebase
- Wearable integration — Apple Watch, HealthKit, Google Health Connect, Garmin, WHOOP
- AI voice coaching and conversational features
- Offline-first workout logging that works in dead-zone gyms
- Coach / admin portals and real-time member sync
- Subscriptions and in-app payments (RevenueCat + Stripe)
Built by people who ship fitness products
UltraFit360 — our own app — is live on the App Store and Google Play with thousands of installs and a 4.8★ rating. That means we have already solved the hard parts of a fitness product: keeping a workout responsive with no signal in a gym basement, syncing a watch to a phone to a coach dashboard in real time, and making AI coaching sound human. You are hiring a team that has done this before on its own dime, not one experimenting on yours.
From idea to TestFlight in about six weeks
Most fitness MVPs reach a TestFlight build roughly six weeks from kickoff. We run a two-week design sprint to lock a testable spec, freeze scope, then build in two-week slices with production code from sprint one. You get a working build to put in front of real users early — because the only honest test of a fitness app is whether someone finishes their first workout.
Frequently asked
How much does it cost to build a fitness app?
It depends on scope, but most fitness MVPs fall in a project-based range that we agree up front — no open-ended hourly billing. We scope a fixed two-week diagnostic first so you know the full build cost before committing. Annual operating cost is deliberately low because we run on serverless Google Cloud; UltraFit360 itself costs low double-digit dollars a month to operate at its current scale.
Can you integrate Apple Watch, Garmin and WHOOP?
Yes. We integrate Apple HealthKit and the Apple Watch natively, Google Health Connect on Android, and Garmin and WHOOP through their public APIs as opt-in connections. Wearable data is treated as health data — encrypted at rest and never used for model training.
Do you build for both iOS and Android?
Yes — we ship both from a single React Native codebase, which keeps cost down and feature parity tight. We use native modules for the parts that genuinely need them, like HealthKit and live Apple Watch sessions.
Let's scope it.
A two-week fixed-scope diagnostic tells you the full cost and plan before you commit. Tell us what you're building.