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Mobile App Development Services That Turn Ideas Into Apps People Use

AngleBrackets is a mobile app development company that designs and builds iOS, Android and cross-platform apps for startups and growing businesses in the US, UK, Canada and UAE. We work in Swift, Kotlin, Flutter and React Native, and pick the stack that fits your budget and your users, not our habits. Senior engineers, a working build every two weeks, and an app you fully own from the first commit.

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FROM IDEA TO APP STORE

Our Mobile App Development Process

Six clear stages with a working build on your phone every two weeks, so you always know what's done, what's next and what it costs.

discover

01

Discovery & Workflow Mapping

We mapped how design teams actually models were actually good at.

strategy

02

UX Design and Prototype

Wireframes and a clickable Figma prototype, tested with real users before any code.

design

03

Architecture and Tech Stack

Native or cross-platform, backend and cloud, chosen for year three, not just launch day.

develop

04

Agile Development

Two-week sprints, each ending with a new build installed on your own phone.

integrate-test

05

Testing and QA

Real devices, automated tests, security checks and a beta round on TestFlight and Google Play.

launch-scale

06

Launch and Support

Store submission, crash monitoring and monthly updates as your users ask for more.

In-App Payments & Commerce

Payments have to work every single time. This is the part of an app where a small bug costs real money, so we build it on the platforms Apple, Google and your customers already trust.

Apple In-App Purchase

Apple's system for digital goods and subscriptions on iPhone. We set up products, free trials, upgrades and receipt checks, so revenue isn't lost to edge cases.

Google Play Billing

The Android side of the same job: subscriptions, one-time purchases and promo codes, with server-side checks so purchases can't be faked.

Stripe

We integrate Stripe for most payment and subscription billing work; it's reliable, well-documented, and the standard most SaaS products are built on.

PayPal

For markets or customers who specifically expect it, we add PayPal alongside Stripe, so checkout doesn't lose a sale over payment method preference.

Paddle

For SaaS products sold internationally, we also work with Paddle, which handles global tax compliance as the merchant of record, so you don't have to worry about that complexity.

RevenueCat

One place to manage subscriptions across iOS and Android, with trial, churn and revenue analytics, so you don't build that plumbing yourself.

Frequently Asked Questions

We are proud of the great projects AngleBrackets has taken part in. Here are some of the most asked questions.

Let's build together

Ready to Build an App People Actually Use?

Tell us what you want to build and who it's for. Our mobile app development team will show you the fastest honest path from idea to an app in both stores, and build it with you.