OnTek Horizon

App Development

Mobile + web apps that load fast, feel native, and survive real-world use.

Usually enters at the build stage.

  • Mobile Apps
  • iOS Development
  • Android Development

What it covers.

One team covers iOS, Android and the web, so every platform ships the same features on the same day. We handle store submissions, crash monitoring and OS updates after launch.

Apps are judged in the first ten seconds and then again every time the network is bad. So the questions we settle first are the ones that are expensive to revisit: what has to work without a connection, what is stored on the device, how it syncs when the signal returns, and which platforms ship together.

Offline is a data-layer decision, not a feature added in month four. Deciding it in week one costs a conversation; deciding it later means rewriting how the app holds state. The same is true of push notifications, background work and anything that touches the camera or location — each one shapes the architecture around it.

Cross-platform by default, with one React Native codebase covering iOS and Android, because shipping both on the same day is worth more to most businesses than the last few per cent of native feel. We go fully native when the app leans hard on sensors, heavy on-device processing or platform features that change every OS release — and we will tell you which case you are in before you commit.

Who it’s for

  • Businesses whose customers expect a phone app alongside the website, and who do not want two teams and two roadmaps.
  • Companies with field staff who need software that works where the signal does not.
  • Product teams replacing an app that was built once, shipped, and never maintained.

What you get.

Every engagement ends with these in your hands, in your accounts, under your ownership.

  • 01

    iOS, Android and web from one codebase

    The same features on every platform on the same day, with the platform differences that genuinely matter handled natively.

  • 02

    Store accounts and submissions

    Developer accounts, listings, screenshots and review submissions, set up in your name so you keep control of them.

  • 03

    Crash and performance monitoring

    Every crash grouped by cause with the device and OS version attached, so a bad release is visible before the reviews arrive.

  • 04

    A maintenance plan

    The people who built it handle OS updates, store policy changes, fixes and the next features under a monthly arrangement.

Built with

  • React Native
  • Swift
  • Kotlin
  • TypeScript
  • Next.js
  • Offline-first sync
  • Firebase and push notifications
  • Sentry

How it runs from brief to launch

App Development follows the same four steps as every discipline here, so adding another one later changes nothing about how you work with us.

  • 01

    Tell us the outcome

    One conversation covers every discipline involved, so you explain the business once, to the people who would do the work.

  • 02

    Get a written plan

    The plan names who does what, in what order and what each part costs, before any of the work starts.

  • 03

    One team delivers it

    Designers, engineers and QA work from the same plan in the same channel, so handoffs happen inside the team.

  • 04

    We stay after launch

    The people who built it keep it running, report on how it performs and keep improving it.

Projects where app development was one of the disciplines on the plan.

Questions we get asked

The ones that come up in the first call. Anything else, ask us directly.

Native or cross-platform?

Cross-platform by default, with React Native sharing one codebase across iOS and Android. We go native when the app leans on the camera, sensors or heavy on-device work.

Do you handle the app stores?

Yes. Developer accounts, store listings, review submissions and the release process, set up in your name so you keep control.

Does it work offline?

When the brief needs it. We plan what is stored on the device and how it syncs from the start, because adding offline later means rewriting the data layer.

What happens after launch?

The people who built it keep it running under a monthly plan: crash monitoring, OS updates, fixes and the next features.

How long does an app take?

A first release covering one core journey on both platforms is usually ten to sixteen weeks, depending on how much has to work offline and whether it integrates with systems you already run. Store review adds a few days at the end.

Ready to buildsomethingthat lasts?

Tell us what you want to build, sell, automate or fit out. We reply within one business day with the disciplines it needs and a plan to get there.