Services

Mobile apps and the cloud they run on.

Services we offer include any or all of the items below. Pick what fits your project — we'll scope to match.

We've been shipping these for paying client engagements since 1998. Most are under NDA, so there are no logos to show — but the bench is real.

01 / iOS

StackSwift, SwiftUI, HomeKit, Core ML, AVFoundation
Typical engagement6–14 weeks
Best forApps that need to feel like Apple built them

Native iOS app development

Pure SwiftUI apps for clients who want the platform's full capability — HomeKit, sensors, Core ML, background tasks, complications. We've shipped consumer utilities and B2B tools to the App Store and know the review process intimately.

  • Architecture & build pipeline
  • SwiftUI design system
  • HomeKit / sensor integrations
  • On-device ML where it fits
  • TestFlight beta cycle
  • App Store submission & review

02 / Cross-platform

StackReact Native, TypeScript, Expo, native modules
Typical engagement8–16 weeks
Best forTwo stores, one team, sane velocity

React Native cross-platform apps

One codebase, iOS and Android, shipped without the platform-feel tax that bad cross-platform apps pay. We drop into native modules where it matters and stay in JS where it doesn't. TypeScript end-to-end.

  • Project scaffolding (Expo or bare)
  • Component & nav architecture
  • Native bridges where required
  • OTA update strategy
  • Crash reporting & analytics
  • Dual-store submission

03 / AI

StackLLM APIs, on-device inference, structured tool use
Typical engagement3–10 weeks
Best forReal AI features, not demos

AI integration in mobile apps

LLMs and on-device models inside real apps with real users. We design the prompt and tool surface, build the tracing and eval harness, and handle the failure modes (latency, cost, hallucination, abuse) that turn demo features into production ones.

  • Prompt & tool-use design
  • Streaming UI patterns
  • Eval & tracing harness
  • Cost & latency budgets
  • Privacy review & data flow
  • Fallback & safety paths

04 / Cloud

StackGCP, AWS, Azure, Node, .NET, Python, Postgres
Typical engagement4–12 weeks
Best forApps that need a real backend, not just Firebase

Cloud backends & web services

The web services your apps talk to. APIs, auth, databases, async jobs, file storage, real-time channels. We've shipped on Google Cloud, AWS, and Azure — and we pick the platform that fits, not the one we know best.

  • API design & auth
  • Database & migrations
  • Background jobs & queues
  • Real-time / WebSockets
  • Observability & alerting
  • IaC & CI/CD

05 / Launch

StackApp Store Connect, TestFlight, ASO, privacy labels
Typical engagement2–4 weeks (launch) or retainer
Best forTeams who built it but haven't shipped before

App Store launch & lifecycle

Submission, review, ASO, privacy nutrition labels, and the long tail of post-launch updates. We've launched paid and free apps and know which review responses move the needle when you get rejected.

  • App Store Connect setup
  • Listing copy & screenshots
  • Privacy nutrition label audit
  • TestFlight cohort management
  • Review response & appeal
  • Post-launch update cadence

Tell us what you're building.

We'll tell you whether we're the right fit, what it would cost, and roughly when it could ship.

Start a project