KTree

ServicesMobile apps

We build iOS and Android apps for your customers and your field teams.

Apps people use every day, tied into your ERP and the other systems you run. For businesses whose customers expect to order, pay and check status on a phone, or whose staff work away from a desk.

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What you get

What we hand over

  1. 01

    The apps, in your own store accounts

    An iOS app and an Android app published under your company name on the App Store and Google Play. The source code is yours, and it is handed over in full.

  2. 02

    A back end connected to your systems

    The API the app talks to, with sign-in, data and file storage, running on AWS or on your own server. It connects to your ERP, web portal, payment gateway and SMS service, so the app and the office work from the same records.

  3. 03

    An admin panel for your staff

    A web screen where your team manages users and content, sends push notifications (short messages that appear on the phone even when the app is closed) and sees how the app is used.

  4. 04

    Store submission and support

    We prepare, test and submit each version to both stores and handle the review. After launch we keep the app up to date with new phones and new versions of iOS and Android.

How it works

One code base, two stores, one back end

Most business apps do not need two separate builds. We write the app once, connect it to a back end that already knows your data, and take it through both stores.

  1. 1The app is written in React Native, a framework that produces the iOS and the Android app from one code base. Flutter does the same job, and Swift or Kotlin are used when an app has to be fully native.
  2. 2The back end is built as an API in Node.js, Spring Boot or Laravel, or as serverless functions on AWS with AppSync and GraphQL, so the phone asks only for the data it needs.
  3. 3Push notifications go out through Firebase and Amazon SNS or Pinpoint when something changes: a status update, a due date, a new message.
  4. 4Each release is tested on both platforms and then submitted to the App Store and Google Play. Later versions follow the same path.

Your options

Your options, compared honestly

  • Alternative

    A no-code app builder

    The quickest and cheapest way to get a simple app out, and a good way to test an idea. It gets hard when the app has to follow your own process or read and write records in your ERP.

  • Alternative

    A freelancer

    Good value for a small, well-defined app. The risk is continuity: an app needs a back end, testing, store submissions and updates for years, and one person has to cover all of it.

  • Alternative

    Separate native teams for iOS and Android

    The right choice for apps that depend heavily on the device, such as games or heavy camera and graphics work. For a business app it usually means building and maintaining everything twice.

  • With KTree

    Build it with KTree

    One team builds the app, the back end and the link to your ERP, and takes it through both stores, at a fixed price when the scope is clear. You own the code and the store accounts.

Problems we have already solved

Not praise. The problem, what we built, and what changed.

All case studies →

Technology

What we build it with

Ways to work with us

A project, a team, or support for what you already run

Project

We build it end to end

A defined scope, delivered in releases you can test. We own delivery from discovery to go-live.

Best for a new system or a rebuild

Dedicated team

Our engineers, your roadmap

Odoo, React, Node, React Native, AWS and PHP engineers who work as part of your team, month by month.

Best for a product that keeps growing

Support

Keep it running

Maintenance, upgrades and urgent fixes for ERP, web and cloud systems, including ones we did not build.

Best for a system already live

Industries

Where we have done this

Related reading

From our engineers

Before you ask

Questions about Mobile apps

Short, straight answers. Anything else, ask in the form below and an engineer will reply.

One code base or two native apps?

For most business apps, one code base. We build in React Native, which gives an iOS and an Android app from the same code, so features reach both at the same time. We go native, with Swift for iOS and Kotlin for Android, only when the app needs something the shared code cannot do well.

Who owns the store accounts and the code?

You do. The apps are published from your own Apple and Google developer accounts, under your company name, and the source code is handed over in full. We do the submission work for you.

How are updates released?

Each new version is tested on both platforms and submitted to the App Store and Google Play, where users get it as a normal update. Content, prices and messages are changed from the admin panel or your ERP, with no new release needed.

Can the app connect to our ERP?

Yes. The app talks to a back end, and the back end reads and writes ERP records through the ERP API, with the permissions each user has. We build and support ERPs ourselves, so one team covers both sides.

Request a quote

Tell us what you are building.

A senior engineer replies within one working day.

  1. 1An engineer reads it. Not a sales desk.
  2. 2A short call. To understand the scope and what you run today.
  3. 3A written estimate. Scope, team and timeline on paper.
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