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Mobile App Development

iOS & Android app development, shipped to the stores

One team for design, apps, backend and release. We handle App Store and Play Store review so your launch date does not slip on a policy rejection.

Reply time
within 1 business day
Working hours
4+ hrs US overlap
Confidentiality
NDA before details
Ownership
Your repo, your IP
What you get

Outcomes, not activity reports

Native and cross-platform apps built for the App Store and Play Store — including the backend, the release pipeline, and the store submissions.

  • An app in both stores, not a demo build stuck on TestFlight
  • One codebase where cross-platform fits, native where performance demands it
  • Offline behaviour, push notifications and deep links handled properly
  • Store compliance reviewed before submission, not after a rejection
Capabilities

What we build under Mobile Apps

Engage us for one of these or the whole line — the team is the same either way.

Cross-platform apps

React Native or Flutter when iOS and Android should share one codebase — typically 30–40% cheaper than two native builds with near-native feel.

Native iOS & Android

Swift and Kotlin when you need hardware access, heavy graphics, background processing or platform features that cross-platform layers expose poorly.

App backend & APIs

Authentication, sync, push infrastructure, file handling and admin panels — built alongside the app by the same team, so nothing gets lost between vendors.

App modernization

Rescue for apps stuck on unsupported SDKs or abandoned by a previous developer. We get the build running, remove the blockers, and get you shipping again.

Store submission & compliance

App Store and Play Store listings, privacy nutrition labels, data safety forms, review responses and phased rollouts.

Post-launch iteration

Crash monitoring, analytics funnels, A/B tested onboarding and a regular release train that keeps you ahead of OS version deprecations.

Deliverables

Exactly what lands in your hands

Written into the contract, so there is no argument at the end about what “done” meant.

  • Clickable prototype approved before a line of app code is written
  • Signed builds distributed via TestFlight and Play Internal Testing
  • Production apps published under your developer accounts
  • Backend, admin panel and API documentation
  • CI/CD pipeline for automated builds and store uploads
  • Crash reporting and analytics wired up and verified
Tech stack

What we build it with

Chosen for your constraints and your hiring market — not for what we happen to enjoy.

Cross-platform

  • React Native
  • Flutter
  • Expo
  • TypeScript
  • Dart

Native

  • Swift
  • SwiftUI
  • Kotlin
  • Jetpack Compose

Backend & services

  • Node.js
  • Firebase
  • Supabase
  • AWS Amplify
  • PostgreSQL

Release & quality

  • Fastlane
  • TestFlight
  • Play Console
  • Sentry
  • Firebase Analytics
Questions

Mobile Apps FAQs

Should I build native or cross-platform?

If your app is mostly screens, forms, lists and API calls, cross-platform is the better economics — one team, one codebase, both platforms. Choose native when you depend on heavy camera or sensor work, real-time graphics, complex background processing, or deep OS integration. We give you a straight recommendation for your specific feature list before you commit.

How long does it take to build an app?

A focused first version is typically 10–16 weeks from kickoff to store approval, including design, build, QA and review time. Apps with payments, live data sync or regulated data take longer, and we tell you that during scoping rather than discovering it in month three.

Do you publish the app under your account or mine?

Yours, always. Your company owns the Apple Developer and Google Play accounts, the listings, the reviews and the users. We work inside your accounts as invited team members, which means changing vendors later never costs you your install base.

What if Apple rejects the app?

We review your feature set against the App Review Guidelines during scoping and flag anything risky early — account deletion, sign-in options, subscription rules and data disclosure catch most teams out. If a rejection still happens, resolving it is on us, not billed as extra work.

Can you maintain an app someone else built?

Usually yes. We start by getting the existing project building reproducibly on our machines and in CI, which surfaces most of the hidden problems in the first week. You get a written assessment before committing to ongoing work.

Ready to talk about mobile apps?

Send your requirement and we will come back with questions, an approach and a written estimate for the mobile app development work.

Reply time
within 1 business day
Prefer email?
sales@tooltar.com