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Mobile Development

Apps People Keep On Their Phone

Native and cross-platform apps that feel native on both stores — fast to open, honest offline, and released on a pipeline instead of a laptop.

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Overview

Mobile engineering that survives the second release

Most mobile projects are fine at launch and painful by version three. We build the boring parts first — data sync, release automation, crash visibility — so adding a feature in month nine costs what it did in month one.

What we get right early

  • Native where it counts. Swift and Kotlin when the platform matters, React Native or Flutter when a shared codebase is the better trade. We say which, and why, before anyone commits.
  • Offline is a design decision. Sync rules, conflict resolution and cache policy written down and tested — not discovered by a user on a train.
  • Releases on rails. Signed builds, provisioning and store metadata in CI from the first sprint, so shipping is a merge rather than an afternoon.
  • Accessible by default. Dynamic type, VoiceOver and TalkBack, contrast and touch targets checked against WCAG 2.2 as screens are built.
Mobile banking application in use
iOS + AndroidOne team, both stores
Start Your Mobile Build
What we build

Everything between an idea and a store listing

Ten engagements covering the app, the services behind it, and the release machinery that keeps both moving.

Why teams pick us

Why choose SysStacks?

Both stores, one team

iOS and Android engineers who sit together, so a decision on one platform never quietly breaks the other.

Offline handled honestly

Sync and conflict rules designed up front and tested against a bad connection, not assumed away.

Release is not an event

Signed pipelines from sprint one. Shipping a build is a merge, and a rollback is a button.

You can see what happened

Crash, performance and funnel instrumentation from the first internal build — before anyone asks why retention dipped.

Accessibility from the start

Dynamic type, screen readers and touch targets checked as screens are built. Retrofitting access is always the expensive path.

How we deliver

How a mobile build actually runs

Six stages, one continuous loop — an app is a product you keep, not a project you finish.

1

Discovery & platform call

What the app must do, who it is for, and whether native or cross-platform is the right trade for your case. You get the reasoning, not just the verdict.

2

Flows & prototypes

Clickable prototypes on a real device early, so the navigation argument happens before anyone writes a view controller.

3

Build & instrument

Screens, services and sync built together, with crash and event instrumentation wired in as we go rather than bolted on before launch.

4

Device & edge testing

Real devices, old OS versions, poor connections and low battery — the conditions your users actually have.

5

Store submission

Signing, provisioning, review notes, privacy declarations and staged rollout. We handle the paperwork that sinks first submissions.

6

Post-launch & OS cycles

Every autumn brings a new iOS and Android. We keep the app current, watch the crash rate, and ship the small fixes that keep ratings up.

Industries we focus on

Where our mobile work tends to land

Retail & commerce

Shopping apps with fast catalogue browsing, saved carts across devices, and a checkout that survives a weak signal in a car park.

Finance & fintech

Banking and payment apps built to the platform security baseline — biometric unlock, secure storage, certificate pinning and audited release builds.

Healthcare

Patient-facing and clinician-facing apps designed around HIPAA and GDPR obligations, with data handling documented before the first screen is drawn.

Field operations & logistics

Apps for people who work where the signal is not. Offline capture, background sync and conflict rules that hold up in a depot.

Education

Learning apps with downloadable content, progress that survives a reinstall, and accessibility that meets the standard a school is held to.

Talk To A Mobile Engineer
Our tech stack

The mobile stack we reach for

Platform SDKs, cross-platform runtimes and the services behind them — picked per project, never by habit.

SwiftSwift
KotlinKotlin
iOSiOS
AndroidAndroid
FlutterFlutter
DartDart
ReactReact
TypeScriptTypeScript
JavaScriptJavaScript
FirebaseFirebase
JavaJava
GraphQLGraphQL
Node.jsNode.js
PythonPython
PostgreSQLPostgreSQL
MongoDBMongoDB
RedisRedis
AWSAWS
Google CloudGoogle Cloud
DockerDocker
GitHub ActionsGitHub Actions
JestJest
FigmaFigma
SentrySentry

Got an app idea, or one that stalled?

Bring us a sketch, a spec, or an existing app nobody wants to touch.

Let's talk mobile
Featured insights

Stories of our transformations across services and industries

From concept to completion.

Explore More
Screenshot of the Silver Jeans online store homepageCase StudySilver Jeans — a commerce platform rebuilt around the customerTeam working on laptops around a wooden tableBlogWhat "production-grade" actually means for LLM systems
Laptop showing code on a bright office deskBlogWhy small senior pods out-deliver large benchesLaptop open on a desk beside a copper jug and fairy lightsBlogA governance checklist to clear before your first fine-tuneLaptop glowing in a dark roomBlogThe uptime math behind a 99.98% commitment
Screenshot of the Meridian Freight site homepageCase StudyMeridian Freight — visibility across a fragmented networkScreenshot of the Halcyon Insurance site homepageCase StudyHalcyon Insurance — claims handling rebuilt end to endScreenshot of the Argent Energy site homepageCase StudyArgent Energy — operations data in one place at last

Get in touch

Tell us about the app. A mobile engineer — not a sales rep — replies within one business day.

Services you're looking for

Prefer email? official@sysstacks.com. Everything is answered by a real person, usually within one business day.