Mobile app development for iOS and Android
that ships and gets used.
We build mobile apps for startups and enterprises: native iOS, native Android, and cross-platform with React Native and Flutter. Apps like our smart parking automation platform (AU), Sharewear (NFC medical wearable), and E2P SEND (UK EdTech). Built properly. Maintained long-term.
Fixed-price, scoped to your build, no hourly billing surprises. Get your number →
8 years · 600+ projects · Fiverr Vetted Pro · US/UK/EU/AU clients
Why teams come to us for a mobile app
Most conversations start with one of these. Here is how we handle each.
Field teams work off paper or texts, and the office finds out hours later.
An offline-capable field app. Job details, photos, signatures, and status from site, syncing when there is signal. It is the pattern behind our smart parking automation platform in Australia.
A previous app got shipped, then abandoned, and now it breaks on new OS versions.
We take it over and maintain it. An audit of the codebase first, then a straight call on rebuild versus continue, plus a retainer so OS updates never blindside you again.
You have a web platform, and customers keep asking for an app.
A companion app on your existing API. React Native or Flutter against the backend you already run, so you are not maintaining two separate products.
The app needs to talk to hardware, and quotes keep coming back vague.
We scope the hardware path properly. BLE, NFC, and IoT integration priced against the real device behaviour, not a line item to resolve later. We built Sharewear, an NFC medical wearable app.
Mobile apps across every category
We build mobile apps that do real things, not apps built to satisfy a checkbox in a pitch deck.
Cross-Platform (React Native & Flutter)
One codebase, two platforms. React Native for teams who want JavaScript on both ends and tight integration with a React web app. Flutter for apps where pixel-perfect custom UI matters most. We have shipped both at scale and will recommend the right one for your project.
Native iOS & Android
Swift for iOS, Kotlin for Android, for when you need deep platform integration, hardware access, or performance that cross-platform can't match. We build native when the use case genuinely calls for it, not as a default upsell.
SaaS Mobile Companions
Mobile interfaces for web-based SaaS products: field crew apps, client-facing mobile portals, and manager apps that surface the data operations staff need on the go. Our smart parking automation platform is a good example: the operator web dashboard and the driver iOS/Android app share the same API.
IoT & Hardware-Connected Apps
Mobile apps that talk to hardware: Bluetooth, NFC, barcode scanning, GPS tracking, and sensor data. Sharewear uses NFC to surface medical information from a wearable. Our smart parking automation platform connects to parking barrier hardware. We've done both sides: app and hardware integration.
Consumer Apps with AI Features
Mobile apps with AI at the core, image recognition, personalised recommendations, voice interfaces, and LLM-powered features. Mebag uses computer vision in the mobile app for product discovery. AI features that are actually useful, not demos that break on real-world inputs.
EdTech & Healthcare Apps
Regulated mobile applications with specific data-handling requirements, client-directed data handling, consent flows, accessibility standards, and the audit trails institutional clients require. E2P SEND (UK teachers and SEND coordinators) and COMPASS for Autism are examples.
Built by AI-native engineers, so on-device and API-driven AI are a feature, not a rebuild
We architect the app and its backend so language-model and vision features slot in later without a rewrite. It is how our own products, Tully AI and Mebag, were built.
Natural-language help and search wired into the app flow, backed by your own data.
Scan, classify, and read documents or objects with the camera, on-device where privacy matters.
Turn a photo or a voice note from the field into structured records, with verification.
Shipped with prompt versioning, evals, and guardrails. See how we build AI →
From concept to App Store
Platform decision: native vs cross-platform
The first decision is the most consequential. We look at your target users, the features the app needs, your existing tech stack, and your timeline. Most of the time React Native or Flutter is right. Sometimes native is. We make the call honestly and explain the reasoning, we don't recommend what's most billable.
UX design: mobile has different rules
Mobile UI design follows platform conventions, iOS Human Interface Guidelines and Android Material Design exist for good reasons. One-handed use, gesture navigation, touch targets, OS typography, we design to the platform, not to a web page shrunk to phone size. Every flow prototyped in Figma before a line of code is written.
API design: the app and the backend together
Mobile apps are only as good as their API. We design the backend and the app together, not as separate projects that need to figure out how to connect later. Offline support, conflict resolution, push notifications, and background sync all have implications for both sides of the system.
Development with real device testing
We test on real devices, not just simulators, across iOS and Android versions. Two-week sprints with testable builds on TestFlight and Google Play internal testing at the end of each sprint. You can install the build on your own phone and test it, not just watch a screen share.
App Store submission and post-launch
App Store and Google Play submission, review management, and the screenshots, descriptions, and metadata that affect discoverability. 30 days of post-launch support included. Most mobile apps need continued development as users find edge cases and suggest features, retainer engagements available.
OS updates and store compliance
iOS and Android ship major releases every year, and store policies change with them. On a maintenance retainer we test each OS beta, keep SDKs and privacy manifests current, and handle the submission rule changes that would otherwise block your next release.
What we build mobile apps with
What mobile app development costs
We don't quote without a scoping conversation. Every build is fixed-price, never hourly, here's what we've delivered at each tier.
Estimate your project cost →Mobile app cost guideFlutter vs React Native
A focused cross-platform app (React Native or Flutter) with core features, auth, and the backend API. iOS + Android from one codebase. 10–16 weeks. Right for validating an idea before committing to the full product.
- Cross-platform (iOS + Android)
- Core features + auth
- Backend API
- App Store submission
A complete mobile app with full feature set, offline support, push notifications, payments, third-party integrations, and the admin dashboard your team needs to manage it. 16–28 weeks.
- Full feature development
- Offline + sync support
- Push notifications
- Payment integration (Stripe)
- Admin web dashboard
- Analytics integration
Native iOS and Android separately, or complex cross-platform apps with hardware integration, enterprise SSO, compliance requirements, or high-performance real-time features.
- Native iOS + Android
- Hardware integration (BLE/NFC)
- Enterprise auth (SAML)
- Compliance architecture
Mobile apps we've built
Smart Parking Driver App
React Native apps for iOS and Android, the driver interface for an automated parking system at a national ambulance service and Australian hotel chains. The constraint: the app had to work reliably under poor lighting, one-handed, in under three taps. Connects to parking barrier hardware and handles real-time bay availability.
Read the case study →Sharewear: NFC Medical Safety App
A mobile app that reads NFC tags embedded in a medical safety wearable to surface critical health information for emergency responders. Built for real emergency scenarios, works without an internet connection, readable within seconds, with the right information shown in the right order without cognitive load on the reader.
Read the case study →E2P SEND: Teachers & SEND Coordinators
A mobile application for UK teachers and SEND coordinators to manage student support plans, track interventions, and collaborate with parents and specialists. Data handling built to UK GDPR requirements, offline capability for use in schools with patchy connectivity, and accessibility-first design for users with varying digital literacy.
View portfolio →What people ask about mobile app development
Straight answers on native vs cross-platform, App Store submission, timelines, cost, and ownership.
React Native or Flutter, which should I use?
React Native if your team already works in JavaScript/TypeScript or you're building alongside a React web app and want to share logic. Flutter if pixel-perfect custom UI is critical and you're not tied to a JS ecosystem. Both are production-grade. Our smart parking automation platform is React Native; we've shipped Flutter apps for clients who needed near-native rendering performance. We'll recommend based on your specific situation.
How long does it take to build a mobile app?
A cross-platform MVP with core features and a backend API: 10–16 weeks. A full product with payments, push notifications, offline support, and an admin dashboard: 16–28 weeks. Native iOS + Android separately adds 30–40% to the timeline. These are working estimates, the actual timeline depends on feature scope, integration complexity, and design readiness. We provide a week-by-week breakdown during scoping.
Do you handle App Store and Google Play submission?
Yes, we handle submission for both stores, including screenshots, descriptions, privacy policy requirements, and review responses if an app gets flagged. App Store review can be unpredictable for certain categories (healthcare, finance), we have experience navigating review for regulated apps and will flag risks before submission, not after rejection.
Can you build an app that works offline?
Yes, offline-first architecture is something we've built for apps used in environments with poor or no connectivity. It requires thinking about conflict resolution (what happens when offline edits sync with server data that changed), local storage limits, and background sync timing. Sharewear and E2P SEND both have offline requirements. It's a design decision that affects the entire data layer, not something you add on after.
Will you maintain the app after it launches?
Yes, most clients stay on a monthly retainer for continued development. Mobile apps need more maintenance than web apps: OS updates change behaviour, App Store guidelines change, and devices your users actually have don't always match the devices you tested on. We've maintained apps for years. It's not optional if you want the app to keep working.
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What I love about Team7 is that they always say: No worries, we can find a solution. This is the mindset of builders, creators, people who do not have fear, the partner you need if you want to excel.
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Ready to build your mobile app?
Tell us what you're building.
30 minutes. No slides. We'll look at your idea, recommend the right platform, and give you an honest estimate of scope and cost.