Prometheas Technologies
Product Engineering practiceProduct engineering · Mobile

Apps users don't notice — for the right reasons.

Mobile software earns attention through reliability that compounds. We build apps that launch fast, don't crash on the long tail of devices, and ship updates without a quarterly release circus.

What it is

iOS, Android & cross-platform apps

Native iOS (Swift/SwiftUI) and Android (Kotlin/Compose) delivery, plus cross-platform (React Native, Flutter) when the business case supports it. Release engineering, crash analytics, and store ops are treated as platform capabilities, not afterthoughts.

When we recommend it

Fit signals.

  • You have a consumer or workforce mobile app stuck in a 6-month release cadence
  • App-store rating is trending down and the team can't find time to fix it
  • You're launching a new mobile product and want a team that's shipped more than one
  • You need a single cross-platform codebase to keep two teams coherent
  • Your mobile app needs to talk cleanly to a custom backend you also own
When it isn't the right call

Honest tradeoffs.

  • You need an internal ops app for a defined user base; consider OutSystems or a web app first
  • You need mobile web (PWA), not a store app — the tradeoff analysis is different
Capabilities

What we deliver in Mobile.

Every capability below is practiced across multiple production engagements — not a scoping checklist.

Native delivery

  • Swift / SwiftUI, modern concurrency, The Composable Architecture
  • Kotlin / Jetpack Compose, coroutines, Hilt
  • MVI / Redux-flavored state where state complexity warrants it
  • Accessibility, localization, and dynamic type as defaults

Cross-platform

  • React Native + Expo for product-led teams
  • Flutter for tightly-branded UI and high graphics fidelity
  • Native modules + bridges when cross-platform hits a wall
  • Shared design system primitives across web and mobile where useful

Release & ops

  • Fastlane / EAS + GitHub Actions pipelines
  • Feature flags + staged rollouts
  • Crash analytics (Sentry, Firebase, Datadog) wired to product metrics
  • App Store + Play Store review management

Mobile patterns

  • Offline-first data sync (SQLite, Realm, Watermelon)
  • Background tasks + push notification strategy
  • Biometric auth + secure storage
  • In-app purchase, subscriptions, and receipt validation
Engagement patterns

The shapes this work
usually takes.

Greenfield app

Typical: 14–22 weeks. Pod of 4–6 including a dedicated QA. Native or cross-platform, design-system-first.

Rescue engagement

Typical: 10–16 weeks. Audit, stabilize, then ship the next release. We don't rewrite by default.

Cross-platform port

Typical: 12–18 weeks. Move from native to RN/Flutter, or vice versa, with a realistic sequencing plan.

Mobile managed service

Monthly. Ongoing feature delivery, store ops, release management, OS-upgrade readiness.

What goes wrong

Pitfalls we've seen
and how we avoid them.

Cross-platform by assumption

'We'll use RN because it's faster.' Sometimes true, sometimes not. We scope a 2-week native-vs-cross spike for non-trivial apps.

No release engineering

Every release is a hero effort. Pipelines + staged rollouts are day-one work.

Offline as a stretch goal

Offline requirements retrofitted six months in break everything. We design the sync model up front or not at all.

Store rejection roulette

Apple and Google guidelines change. We include a pre-submission review cycle in every release.

FAQ

Common questions about Mobile.

Depends on design fidelity, team shape, and product ambition. We recommend native when the product's identity is platform-native (true for most consumer apps with strong UX) and cross-platform when reach + velocity beat polish. A 2-week spike answers the question cheaply when it matters.

Other Product Engineering modules

Mobile on your roadmap?

Thirty minutes with Kabir. Architecture sketch, candid second opinion, scope estimate — no slides.

Book the call