Mobile App Development
Kornspire designs and builds iOS and Android applications — offline-first data handling, secure storage, push notifications, store release management and post-launch maintenance.
The problem
The problems that only appear on a real device
Mobile punishes assumptions that web applications tolerate. The network disappears mid-task. The operating system kills a background process. A permission is denied. A store reviewer rejects a release for a reason nobody anticipated. An app that was never designed for those conditions does not degrade — it loses data and trust.
Signals you have this problem
- Field staff work in places with no reliable connectivity
- A mobile-responsive website cannot reach the camera, location or offline storage you need
- Users abandon the app after losing work to a dropped connection
- Store releases are slow, manual and occasionally rejected
Our approach
Offline-first, then everything else
We design the data layer before the screens: what is cached, what queues, what wins when the same record changes in two places. Platform choice follows the requirement — a shared React Native codebase where the product is largely data and forms, native where the product depends on platform-specific hardware or performance. Release engineering is set up once, early, so shipping stays boring.
Cross-platform and native engineering
React Native for shared codebases; native Swift or Kotlin modules where the product depends on platform-level capability.
Offline-first data architecture
Local persistence, outbound operation queues, conflict resolution rules and clear user-facing sync state.
Device and platform integration
Camera, location, Bluetooth, biometrics, secure keystore, background tasks and deep links, each with a permission-denied path.
Notifications and engagement
Push notification infrastructure, in-app messaging, deep-linked journeys and preference controls that respect the user's choices.
Mobile security
Secure credential storage, certificate handling, obfuscation where warranted, and no secrets shipped inside the binary.
Release and store operations
Automated builds, staged rollouts, crash and performance monitoring, store listing preparation and review-rejection handling.
Outcomes
What changes for you
- Work that continues when connectivity does not
- Releases that ship on a predictable cadence rather than as events
- Crashes and regressions detected from telemetry rather than reviews
- One codebase and one design system across both platforms where that is the right trade-off
Deliverables
What you receive
- iOS and Android applications with source code you own
- Offline and synchronisation design document
- Automated build and release pipeline
- Crash, performance and analytics instrumentation
- Store listing assets and submission checklist
- Maintenance plan covering OS version upgrades
Evidence
What you can check before you call
The standards below are how we deliver mobile app development — published so you can hold us to them. A fixed-scope assessment is the lowest-risk way to see them applied to your own work.
- Engineering playbook
ADR-001: how we select technology
The criteria applied before any stack decision, including when a client already has a preference.
Read ADR-001(opens in a new tab) - Engineering playbook
Security practices
Our baseline on every engagement: secrets, authentication, authorisation, input validation, transport, dependencies, an OWASP Top 10 review and data minimisation.
Read the practices(opens in a new tab) - Engineering playbook
Testing philosophy
What we test, at which level, and what we deliberately do not — the standard a handover is held to.
Read the philosophy(opens in a new tab) - Engineering playbook
Code review standards
What every change is reviewed for before it merges, and what blocks it.
Read the standards(opens in a new tab)
How it runs
The engagement, step by step
- 01
Define the device reality
Target OS versions, device tiers, connectivity assumptions, permissions and the offline behaviour expected for each task.
- 02
Design data and interaction
Local data model, sync and conflict rules, then screens and navigation designed for one-handed use and interruption.
- 03
Build and instrument
Feature delivery with crash reporting, performance tracing and analytics wired in from the first internal build.
- 04
Release and maintain
Internal and staged distribution, store submission, monitored rollout, then a maintenance cadence tied to OS release cycles.
- React Native
- Expo
- TypeScript
- Swift
- Kotlin
- SQLite
- Firebase Cloud Messaging
Typical engagements
What this looks like in practice
Illustrative shapes of work rather than client stories. We publish client work only with the client's consent and with real figures, so these describe the problem and the approach instead.
Field operations app
Job lists, photo capture, signature and form completion that work fully offline and reconcile when the device reconnects.
Customer self-service app
Authenticated account access, bookings or orders, notifications and support, sharing one API with the web portal.
Internal approval and inspection app
Checklists, evidence capture and approvals with an audit trail that holds up when the record is questioned later.
Answers
Mobile App Development: questions
What is mobile app development?
Mobile app development is the design, engineering, release and maintenance of applications that run on iOS and Android devices, including their offline behaviour, device integrations, secure local storage and app-store distribution.
React Native or fully native — how do you choose?
By what the product actually depends on. If it is mostly data, forms, lists and notifications, a shared React Native codebase delivers both platforms for materially less cost and keeps behaviour consistent. If it depends on sustained camera or sensor processing, complex platform-specific UI, or the newest OS APIs, native is the correct choice. Hybrid is also valid: React Native shell with native modules where they earn their place.
Do we need a mobile app if we already have a responsive website?
Frequently not. A well-built responsive site or installable web app covers many mobile needs at a fraction of the cost and with no store review. An app is justified when you need genuine offline operation, hardware access, background processing or reliable push notifications. We will say when a website is the better investment.
Who publishes the app to the stores?
Publishing happens under your own Apple and Google developer accounts, so the listing, the reviews and the signing identity remain your property. We prepare the builds, assets and submission material, and handle review feedback with you.
What does mobile maintenance actually involve?
Apple and Google change platform requirements every year, and an app that is not maintained eventually stops being distributable. Maintenance covers OS and SDK upgrades, dependency and security updates, crash triage, store policy changes and periodic device-matrix testing.
Deep dives
5 detailed articles on this topic
Longer technical pieces, each covering one specific decision inside this service. Written to be argued with, not skimmed.
Keep reading
Related services
Considering mobile app development?
Tell us the outcome you need and the constraints you are working inside. You will get a straight answer about whether this is the right service, a smaller one, or none of ours.
Prefer email? hello@kornspire.com