iOS and Android app development

Who it is for

Founders and early teams whose product needs to live on a phone: something people use every day, on the move, or with phone features such as the camera, location, or push notifications.

• Founders launching a first app who want it in the App Store or Google Play, with one critical workflow done well.
• Teams with a web product whose users keep asking for an app, and who need to decide what the app should do first.
• Teams with an app people struggle with, where the core flow needs to be reworked and rebuilt.
• Companies adding an app to an existing product, working with their own engineers on the systems behind it.

The case studies on the work page include iOS app design for health, travel, and wellbeing products, each starting from the problem people had.

The problems it solves

• Websites dressed up as apps. A website inside an app shell feels slow and out of place on a phone. Choie builds real applications for iOS and Android.
• Choosing native or cross-platform blind. The right choice depends on the phone features you need, the budget, and who maintains the app later. It is decided in the written scope, with the trade-offs explained, before any code is written.
• Two platforms before anything is learned. Building iOS, Android, and web at once multiplies the cost before you know what users want. The scope names which platforms ship first.
• Store surprises at the end. Permissions, notifications, payments, and store review each follow the platform's own rules. They are planned from the first week instead of being discovered at launch.

What you get

• A production app for iOS, Android, or both, covering the workflows named in the written scope.
• Flows and interface design for every screen and state, following each platform's conventions where they matter.
• The platform work the app needs to launch, such as permissions, notifications, and sign-in, when the scope names it.
• Submission to the App Store, Google Play, or both, then fixes to whatever gets in users' way after launch.
• The source code and the designs, yours once each deliverable is paid for.
• Thirty days of free fixes for defects in our own work after launch.

How it runs

A mobile build follows the same four to six week shape as every build at Choie.

1. Before day one. A 30-minute intro call, then a written scope within two days that names the platforms, the workflows, the date, and the price.
2. Weeks 1 to 2: decide. Flows, hierarchy, and what ships first. The first version to use goes out on the first Friday.
3. Weeks 2 to 5: build. Design and code move together, with a new version to use every Friday. Design sign-off is the second payment milestone.
4. Final week: ship. Store submission and launch, then we watch real people use the app and fix what gets in their way.

Apple and Google set their own review times, so the schedule leaves room for them. AI and our own kit make the build fast, so details like motion and touch feedback don't get cut for time. Senior people review every line before it ships.

Price and timeline

A mobile app build starts at $19,000, with no tax added on top, and takes four to six weeks. It is paid in three steps: at the start, at design sign-off, and at launch.

Platforms move the number most. One platform is the smallest first release; iOS and Android together add screens, testing, and a second store submission. Integrations such as payments and sign-in add to it as well. The written scope fixes one total before work starts.

Apple and Google charge their own developer account fees, which they bill to you directly. To test the core flow before a build, a one-week coded prototype is a fixed $4,900 and is credited in full to a build that starts within 60 days.

When not to hire Choie for this

• The app has to ship on iOS, Android, and the web at once, with complex integrations. That is several products in one release, and a larger agency or an in-house team is better placed for it.
• The job needs neither the stores nor phone features. A responsive web application may be a cheaper first release, and we will say so on the intro call.
• You want app maintenance billed by the hour. Ongoing work at Choie is a monthly engagement with one priority at a time, not an hourly support desk.
• There is no clear first release. An app with no agreed first workflow cannot be given a fixed price or a fixed date.

Common questions