Fintech · BLE
BLE Contactless Payment SDK & Platform
Cross-platform SDKs for iOS, Android and Windows over a custom BLE GATT profile with ECDH + AES-256-GCM. 850+ terminals in three countries, 99.8% success, PCI DSS Level 1.
$ cd /services/mobile agent.ready · mobile
Mobile App Development
Apps that survive the commute, the basement Wi-Fi and the flaky LTE. Cross-platform when time to the store matters most, fully native when frame budgets and on-device AI do. Fitness, banking, fleet, AR and visionOS apps with four-plus stars.
- App Downloads
- 120 K+
- Avg Store Rating
- 4 .8★
What we ship
Apps your users won't rage-quit. Cold-start measured on a two-year-old mid-tier Android, not an M-series simulator. 60 fps scroll on a list of a thousand items. Offline mode that handles a subway tunnel, not just a plane-mode screenshot.
Cross-platform with React Native (New Architecture: Fabric, TurboModules, Bridgeless), Flutter or Compose Multiplatform when one codebase makes sense; Swift / SwiftUI and Kotlin / Jetpack Compose when it doesn’t. BLE GATT, ARKit, ARCore Geospatial, WebRTC, HealthKit, Google Fit, on-device LLMs via Apple Foundation Models or Gemini Nano (AICore), Apple Tap to Pay on iPhone or Android Tap to Pay (NFC) for payments — whichever OS APIs the feature needs. CI/CD tight enough that a git push lands on your phone in under ten minutes.
How we run a mobile build
-
Platform call — We pick native, React Native, Flutter or Compose Multiplatform against your timeline, team size and the OS APIs you’ll touch. There’s no religious answer.
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Design for thumbs — Mobile isn't 'the web, smaller'. One-handed reach, offline-first defaults with Yjs / Automerge for conflict-free sync, screens that survive a 3-second attention window.
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Performance is a feature — Cold-start budgets, scroll profiling, bundle size tracked per PR. We test on low-end devices and on visionOS where it matters, not just the flagship in the office drawer.
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Store-ready from week one — Fastlane, TestFlight, Play Console, feature flags and Crashlytics / Sentry / Bugsnag all wired before the first real build. Release day is uneventful on purpose.
What we build for you
S-01
Cross-Platform Apps
- + React Native (Fabric / TurboModules / Bridgeless)
- + Flutter & Compose Multiplatform (KMP)
- + Shared component libraries, expo SDK
S-02
Native iOS & visionOS
- + Swift, SwiftUI, Swift Concurrency
- + Apple Intelligence + Foundation Models, Core ML 8, MLX
- + HealthKit, ARKit, App Clips, visionOS / Vision Pro
S-03
Native Android
- + Kotlin, Jetpack Compose, KMP
- + Gemini Nano via AICore + ML Kit + MediaPipe
- + Material You, Google Fit, BLE GATT
S-04 Real-time, BLE,
Real-time, BLE,
AR & Sensors
- + WebRTC video, voice & data channels
- + BLE GATT profiles, NFC, ECDH, Apple/Android Tap to Pay
- + ARCore Geospatial, ARKit, Quest 3 + WebXR
S-05 App Store &
App Store &
DevOps
- + Fastlane pipelines & signed binary automation
- + TestFlight, Play Console & staged rollouts
- + Push, Firebase, Crashlytics / Sentry / Bugsnag
How an app
makes it to the store
01 Platform &
Platform &
UX call
Week one: native vs React Native vs Flutter vs Compose Multiplatform, user journeys, offline contract, target device list. We don't start Xcode or Android Studio until this is written down.
02 Build &
Build &
dog-food
Weekly TestFlight and Play Console builds. Demo on real devices, not simulators. Your team uses it before anyone outside does.
03 Polish &
Polish &
performance
Cold start under two seconds, 60 fps on mid-tier, crash-free rate above 99.8% before submission. Battery profile + memory pressure measured, not eyeballed.
04 Launch &
Launch &
keep iterating
Store submission, staged rollout to 10% then 100%, crash monitoring hooked into Slack, and post-launch iteration on the feedback you get.
A few case studies where this work shows up.
We’ve shipped this before.
Five apps in production, from fitness to fintech to fleet, shipped by this team.
The questions people actually ask.
If your question isn’t here, email us . We read everything that comes in.
Should we go cross-platform or native?
Depends on three things: timeline, team and which OS APIs you touch. React Native (with the New Architecture), Flutter or Compose Multiplatform is faster to both stores with one team. Native Swift / SwiftUI or Kotlin / Jetpack Compose wins when ARCore Geospatial, HealthKit, Apple Foundation Models, Gemini Nano or hard animation budgets are non-negotiable. We’ll give you the honest call, not the one that keeps us billing longer.
What drives the call:- 1. OS APIs and on-device AI your feature needs
- 2. Animation and performance budgets
- 3. Your team, timeline and ongoing maintenance plan
How long does a real app take?
An MVP is usually 8 to 12 weeks kickoff to store. Anything involving BLE, AR, real-time video or payments is 14 to 20. The proposal has a date on it. If we’re going to miss it, you hear in week two.
Typical milestones:- 1. Weeks 1-2: platform + UX, target device list
- 2. Weeks 3-8: core build, weekly TestFlight + Play
- 3. Weeks 9-12: polish, perf, store submission
Do you handle App Store and Play Store submission?
Yes. Screenshots, metadata, review-guideline compliance, staged rollout. We know which rejection reasons come up most and build around them from day one, not the night before submission.
What that covers:- 1. App Store Connect + Play Console setup
- 2. Review guideline pre-check before submission
- 3. Staged rollout with crash monitoring
Can you bolt mobile onto our existing web product?
Usually, yes. Either a native companion that shares your API and design tokens, or a React Native wrapper around parts of your web UI with native modules where the web falls short.
Common shapes:- 1. Native companion app sharing your backend
- 2. React Native wrapper with native modules
- 3. PWA with install prompts and offline cache
How do you handle offline-first?
Local-first storage, optimistic UI with retry, background sync with Yjs or Automerge for conflict-free merging, plus a transactional fallback for monetary fields where last-write-wins is wrong. The app doesn’t just survive offline — it forgets whether it was online at all from the user’s perspective.
The offline stack:- 1. SQLite, Realm or Turso embedded on device
- 2. Background sync with Yjs / Automerge CRDTs
- 3. Transactional path for money/stock, optimistic UI for the rest
How do you price mobile projects?
Milestones, not hours. MVP, beta, store launch, each with a fixed deliverable. You know what you’re paying for and you can stop after any milestone.
Engagement models:- 1. Fixed-scope MVP build
- 2. Monthly iteration retainer, exit any month
- 3. Embedded mobile engineer inside your team