United Kingdom · Agentic mobile development

Mobile App Development for iOS and Android in the United Kingdom

Neither store dominates in the United Kingdom. StatCounter puts mobile operating system share for September 2026 at 53.11% Android and 46.88% iOS, so an app that launches on one platform first leaves close to half its audience waiting. The harder planning sits around the code: a digital consent age of 13 that the Secretary of State can now change by regulations, a new PECR exception for analytics, and CMA oversight of Apple and Google whose rules for developers are still being settled.

Curiosive is an Ankara, Türkiye studio: we build iOS and Android apps from one React Native codebase, with AI coding agents producing the volume and a senior engineer reviewing every change. The studio's working day opens three hours before a UK morning in winter and two hours before it in summer, which is why handoffs are written rather than left for a call. Agents draft the screens. Engineers own the parts that can hurt users: tokens, payments, permissions and the privacy declarations stores review.

Start a partnership From $2,000 per month

24: published portfolio projects
5+: years building for production
12: countries the work runs in
100%: of code read by a senior engineer
1 day: to hear back, from the engineer

Android and iOS in the United Kingdom: one React Native codebase

With the split that close, a single React Native codebase is usually the sensible starting point: one set of business logic, two store builds, platform code only where the device demands it. Each store still has its own gate. Since 31 August 2026, new apps and updates submitted to Google Play must target Android 16 (API level 36) or higher, and every app published on Play must complete the Data safety form, which covers data collected or shared through third-party SDKs. On iOS, uploads to App Store Connect need a privacy manifest declaring approved reasons for each required-reason API the code uses. Our work for a client in the United Kingdom includes Roblox Den (robloxden.com), a reference site with 100,000+ game codes, a browser extension and mobile apps. Other React Native apps of ours are TrendinChat (trendin.chat), shipped in two weeks, and the Coffict (coffict.com) ordering and loyalty app.

Article 8 of the UK GDPR sets 13 as the age at which a child can consent to an information society service; below 13, a holder of parental responsibility has to give or authorise consent. Since 29 April 2026, a power added by the Children's Wellbeing and Schools Act 2026 lets the Secretary of State move that age anywhere from 13 to 16 by regulations, including different ages for particular services. We keep the age threshold as configuration, not a constant scattered across screens. Since 5 February 2026, Schedule A1 to PECR lets a service store or read information on a user's device without consent when the sole purpose is collecting statistics about how the service is used, with a view to improving it. The user must get clear and comprehensive information about that purpose and a simple, free way to object, and must not have objected. The statistics may be shared only to help improve the service, so each analytics SDK is checked against that limit.

App store competition rules for developers in the United Kingdom

On 22 October 2025 the CMA designated Apple and Google as having strategic market status in their mobile platforms, with the designations lasting 5 years. Final commitments from both companies, covering the app review process, app store ranking and data safeguarding, were published on 1 April 2026. In June 2026 the CMA consulted on proposed conduct requirements that would let developers steer users out of the app, including to complete transactions on fair and reasonable terms. It published the consultation responses in August 2026. Those requirements are still proposals, not settled rights, so we keep purchase logic behind one entitlement service on the server. If steering to a web checkout becomes allowed, the app reads the same entitlement whichever way the customer paid, and only the paywall screen changes.

What coding agents build and what engineers own in your app

Agents scaffold screens, navigation, list rendering and form validation, write tests and draft store metadata. Token storage (Keychain on iOS, Keystore on Android) stays with engineers, as do auth refresh, server-side receipt and entitlement checks, offline and reconnection behaviour, permission prompts and the privacy declarations for review. Store rules add to that list: an iOS app that supports account creation must let users start deletion inside the app, and Google Play also requires a web link for deletion requests. Accessibility goes in from the first screen. UK public sector websites and mobile apps must meet WCAG 2.2 AA and publish an accessibility statement, and every UK service provider must make reasonable adjustments under the Equality Act 2010, or the Disability Discrimination Act 1995 in Northern Ireland.

Proof

Published project examples

TrendinChat

Coffict

This is HCD

MoneyCare

Appster

Release Coach AI

AI-accelerated development

from$2,000

per month

Senior engineers building your product with AI coding agents: web, mobile, SaaS or browser extension, reviewed before anything ships.

Web, mobile, SaaS and browser extensions
AI-assisted delivery under senior engineer review
Scope and capacity agreed in writing, renews monthly

AI-accelerated development, billed monthly. We confirm scope, capacity and start date in writing before checkout.

Questions

The things people ask before starting.

Do UK apps need parental consent for children under 13?

Yes, if the app relies on a child's consent. Article 8 of the UK GDPR sets 13 as the age at which a child can consent to an information society service, and below it a holder of parental responsibility must give or authorise consent. Since 29 April 2026 the Secretary of State can change that age by regulations to anywhere from 13 to 16.

Does a UK mobile app need consent for analytics?

Not always, since 5 February 2026. Schedule A1 to PECR allows device storage without consent when its sole purpose is collecting statistics on how the service is used, to improve it. Users must get clear information and a simple, free way to object, and the data may be shared only to help improve the service. Whether a given SDK qualifies is worth confirming with a lawyer.

Can UK app developers send users to a web checkout instead of in-app purchase?

That depends on rules the CMA is still working on. In June 2026 it consulted on proposed conduct requirements that would let developers steer users out of the app to complete transactions on fair and reasonable terms, and it published the responses in August 2026. We build entitlements on the server so either route can be supported.

How much does it cost to build an iOS and Android app for the UK market?

Work runs as AI-accelerated development, starting from $2,000 per month, with scope agreed in writing. That is the studio's single offer, AI-accelerated development billed in US dollars, and a discovery call comes first so scope and capacity are written down before work starts. iOS and Android come from one React Native codebase, so both stores share the same build effort, and there is no long contract to begin.

Solutions

Locations

What happens after you write to us.

01
You describe the product
One paragraph on what you are building, roughly when you need it, and who it is for. No brief, no form with fifteen fields.
02
You get a reply within a day
From the engineer who would do the work, not a sales team. If we are not the right fit we say so, and where possible we point you somewhere better.
03
You get a scoped plan
Scope, price and timeline in writing before anything is committed. You decide with the numbers in front of you.

No long contract to begin, no lock-in to our tooling, and the code is yours from the first commit.

Start a conversation

Contact

Looking for an engineering partner for the long haul?

A short note about the product, the timeline and who it is for is enough to start. You will hear back from the engineer who would do the work, not a sales team.

hello@curiosive.com See what we have shipped

Ankara / Türkiye · Working across European and US time zones

Mobile App Development for iOS and Android in the United Kingdom

Android and iOS in the United Kingdom: one React Native codebase

App store competition rules for developers in the United Kingdom

What coding agents build and what engineers own in your app