1. 01DesignScreens shaped around one clear job, before a line of code.
  2. 02BuildFlutter for iOS and Android, with the backend, payments and AI behind it.
  3. 03ShipTestFlight, store review and launch day, then the updates that keep it alive.

No templates. No app builders. No drag-and-drop shortcuts. Every app we ship is designed and engineered from scratch, by the people you actually talk to, and the same team has apps live on the App Store and Google Play today.

25+ years · one team · nothing offshored

Six apps.

Designed and built in-house

Mobile app development for iOS and Android, from a travel eSIM store and a VPN to parcel collection, EV charging and dating.

  1. 01SimplySIM
  2. 02SimplyRoam VPN
  3. 03SimplyTrips
  4. 04HolaParcel
  5. 05Wattly
  6. 06Off The Sofa
Live iPhone & iPad Android

SimplySIM

Travel eSIM app

Travel data for 190+ destinations, bought and installed without leaving the app. Travellers search for where they are going, compare local, regional and global plans, pay in a few taps and install the eSIM with one tap. Live data usage and a native help centre keep them connected once they land.

  • Search 190+ destinations across local, regional and global plans
  • Buy in a few taps, then a one-tap eSIM install
  • Live data usage for every eSIM
  • A native help centre with guided fixes and device checks
  • Saved plans, on iPhone, iPad and Android

Flutter Dart Riverpod REST API Stripe

Download on theApp Store (SimplySIM, opens in a new tab) Get it onGoogle Play (SimplySIM, opens in a new tab) Visit site (simplysim.co.uk, opens in a new tab)
SimplySIM app, eSIM plan detail
SimplySIM app, home screen with destination search
SimplySIM app, explore destinations
Live iOS Android

SimplyRoam VPN

VPN app

One idea, done properly: sign in, pick a country and tap Connect, then watch the tunnel draw across an animated world map. Under the hood it runs WireGuard by default with OpenVPN as a fallback, across servers in 43 countries.

  • WireGuard by default, with OpenVPN fallback
  • Servers in 43 countries
  • The tunnel drawn live across an animated world map
  • In-app speed test and a live session timer
  • Subscriptions via in-app purchase on mobile, Stripe on the web

Flutter WireGuard Next.js TypeScript MariaDB Stripe

Download on theApp Store (SimplyRoam VPN, opens in a new tab) Get it onGoogle Play (SimplyRoam VPN, opens in a new tab) Visit site (simplyroam.co.uk, opens in a new tab)
SimplyRoam VPN app, choose a country
SimplyRoam VPN app, connect screen with recent locations
SimplyRoam VPN app, welcome screen
iOS Android

SimplyTrips

Trip countdown & planner

A trip planner from the SimplySIM family that counts down to your next holiday and keeps everything for it in one place: a day-by-day itinerary, a prefilled packing checklist and the weather for your dates.

  • A live countdown, with home-screen widgets
  • Day-by-day itinerary and a prefilled packing checklist
  • Weather for your travel dates
  • Schengen 90/180 calculator, travel stats and a passport wall of visited countries
  • Trips stay on the device, with iCloud backup

Flutter Widgets On-device storage iCloud backup

Visit site (simplytrips.co.uk, opens in a new tab)
SimplyTrips app, welcome screen
SimplyTrips app, trip countdown and Schengen tracker
SimplyTrips app, weather for your dates
Beta iOS Android Web

HolaParcel

Parcel collection app

Parcel collection for golf resorts and residential communities in Spain, launching at Condado de Alhama, Murcia. Residents get a Hola ID address to give couriers, an alert when a parcel lands, and collect it with a six-digit code or a QR. Partner shops run the other side of the same app.

  • A Hola ID collection address to give couriers
  • SMS and email alerts when a parcel arrives
  • Collect with a six-digit pickup code or QR
  • Counter mode for shops to receive, shelve and hand over parcels
  • Eight languages, pay-as-you-go or the monthly Residente plan

Flutter Next.js TypeScript MySQL Drizzle Stripe

Visit site (holaparcel.com, opens in a new tab)
HolaParcel on the web, mobile view of the home page
HolaParcel, find your parcel with a Hola ID or pickup code
HolaParcel on the web, mobile view of plans and pricing
Beta iOS Android Web

Wattly

EV charger sharing app

Book a neighbour's EV charger, or earn from your own. The Flutter app for iOS and Android is in testing, built on the Wattly platform that is already live on the web at wattly.co.uk.

  • A live map of home chargers and 160,000+ public chargers
  • Clustering, filters and battery-aware route search
  • Hosts set their own prices and hours
  • Stripe Connect payouts to hosts
  • Session tracking from the charger API

Flutter Next.js TypeScript MapLibre Stripe Connect

Visit site (wattly.co.uk, opens in a new tab)
Wattly, live charger map with clustering and filters
Wattly on mobile, find a charger near you
In development iOS Android Web

Off The Sofa

Dating app

A dating app built to get people onto real dates, not into endless chat. Instead of a blank message box, matches answer up to five preset questions, and either person can ask for a date.

  • Up to five preset questions instead of endless chat
  • Either person can ask for a date
  • An availability planner finds times you are both free
  • Exclusive matching until the date, with date-day quick messages
  • Post-date reviews, and inclusive from launch

Flutter Dart PHP MySQL JWT

Off The Sofa app, pick your questions
Off The Sofa app, discover people near you
Off The Sofa app, it's a date

The lineup.

Six apps. One team. All built from scratch.

Every app on this page side by side: spin the ring, or pick one to jump to its chapter.

Also built on the web side.

Web apps, PWAs and platforms by the same team, shown at our sister studio, Digital Wizards.

Industries

Travel & eSIM Privacy & VPN Logistics & Parcels EV & Green Tech Dating & Social Telecoms

What we build.

From the first screen to the store listing, every layer of your app.

iOS and Android app development in Flutter, app UI and UX, backends and APIs, payments, AI features, store launch and ongoing support.

iOS & Android Apps

Native-feeling apps for iPhone, iPad and Android, built in Flutter from one codebase, so both platforms launch together and every update lands on both.

Flutter Dart Riverpod iOS Android

App UI & UX

Screens shaped around the one job each user came to do. Flows, prototypes and final designs that feel at home on iOS and Android, from onboarding to the last settings toggle.

UX flows Prototypes UI design Motion

App Backends & APIs

The part users never see: APIs, accounts, databases and admin tools, built in Next.js and TypeScript or PHP on MySQL and MariaDB, secured with JWT.

Next.js TypeScript PHP MySQL Drizzle

Payments & Subscriptions

One-off payments, subscriptions and marketplace payouts: Stripe and Stripe Connect where the stores allow it, in-app purchase where they require it.

Stripe Stripe Connect In-app purchase

AI Inside Apps

AI that does a job in the app: conversational help, smart search and features that understand what users type, powered by large language models through the app backend.

LLM APIs Search Assistants MCP

Launch & the Stores

TestFlight and Google Play testing tracks, store listings and screenshots, privacy details, app review and release day, with the developer accounts in your name.

TestFlight Play testing App review Store listings

Support, Updates & App Rescue

Updates for new iOS and Android versions, fixes and new features after launch, and a clear plan to stabilise and finish apps that have stalled elsewhere.

Updates Fixes New features App rescue

AI, in your pocket.

Features that do a job, inside apps people already use.

Pipeline: tap, understand, model, decide, notify Tap Understand Model Decide Notify

AI Features in Apps

AI that earns its place on a small screen: features that understand what a user types or photographs, summarise, sort and suggest, built on large language model APIs (Anthropic, OpenAI and others) called from the app backend, so keys and rules never ship inside the app.

LLM APIs Flutter Backend Guardrails

Conversational & Search

Help that answers in the app instead of a support inbox, and search that understands what people mean, not just what they typed. Answers stay grounded in your own content and data, with clear rules for what the assistant can and cannot do.

Assistants Smart search RAG In-app help

Apps Inside AI Assistants

Your app does not have to wait to be opened. SimplySIM for Claude is a Claude plugin and public MCP server with 12 tools: an AI assistant can search destinations, compare plans, build a basket, check device compatibility and hand over a Stripe payment link, while card details never touch the chat. See it on GitHub (opens in a new tab)

MCP Claude 12 tools Stripe

Automation Behind the App

The work that happens when nobody is looking: push notifications fired by real events, payments and payouts settled through Stripe, and webhooks that keep the app, the backend and your other systems in step, so nobody has to copy anything by hand.

Push Payments Webhooks Integrations

What we wire up behind the app

  • Push notifications — triggered by orders, bookings, arrivals and reminders
  • Payments and payouts — Stripe checkout, subscriptions and Stripe Connect
  • In-app purchase — store subscriptions alongside web payments
  • Webhooks — keeping the app, backend and third-party systems in step
  • Email and SMS alerts — sent alongside push where it helps
  • Live data from other systems — charger, map and network APIs

AI we build into apps

  • Conversational help inside the app, grounded in your own content
  • Search that understands intent, not just keywords
  • Features that read text or images and fill in the details
  • Summaries, suggestions and smart defaults for busy users
  • MCP servers that let AI assistants use your service safely
  • AI calls routed through the backend, so keys never ship in the app

One team.
Hands-on.

App Wizards is the app studio of Digital Wizards: the same in-house UK team that has been building for the web since 1999, focused here on one thing, mobile apps for iOS and Android.

We design and build apps from scratch, mostly in Flutter so one codebase serves iPhone, iPad and Android, and we build what sits behind them too: the backend and API, accounts, payments and subscriptions, push notifications and AI features.

Our lead developer brings 25+ years of full-stack engineering experience, and the team has taken apps through TestFlight, Google Play testing and store review to release. SimplySIM and SimplyRoam VPN are live on the App Store and Google Play today.

Nothing is offshored. You talk to the people building your app, you own the code, and the store accounts are in your name. We work with start-ups and established businesses alike, always with a personal, hands-on approach.

Work with us

Sister studio

Need a website, software or SaaS?

That's Digital Wizards, our sister studio. Same team, same standards, since 1999: everything on the web side is built there.

  • Bespoke web developmentWebsites and web applications built from scratch.
  • Software & SaaSPlatforms, APIs and products with paying users.
  • eCommerceCustom stores, checkouts, stock and fulfilment.
  • AI & automationAI workflows and systems wired together.
  • Digital consultancyAudits, architecture, roadmaps and project rescue.
Visit Digital Wizards digitalwizards.co.uk (opens in a new tab)

Questions, answered.

Everything you need to know about building an app with App Wizards.

Cost and timelines

Every App Wizards project gets a fixed-price proposal, agreed after a free discovery call, so the price is known before any work starts. The cost depends on what the app needs to do: the number of screens and features, whether it needs a backend, accounts, payments or AI, which platforms it ships on and the timeline. A detailed proposal sets out the scope, approach and fixed price.
It depends on the scope, and the proposal sets out a clear timeline before work starts. Many apps launch faster by starting with the smallest version worth releasing, then adding features once real users are on it. App Wizards keeps you updated throughout the build, with test builds you can install on your own phone.

Building apps

For most apps Flutter is the better choice: one codebase runs on iOS and Android with native performance, so you build, test and update once instead of twice. App Wizards builds mostly in Flutter, and uses native platform code where an app needs something specific to iOS or Android, such as a VPN tunnel or home-screen widgets.
Yes. App Wizards builds iOS and Android apps from one Flutter codebase, so both versions launch together and stay in step with every update. SimplySIM, for example, runs on iPhone, iPad and Android from the same code.
Yes. App Wizards builds the whole product, not just the screens: the backend and API (Next.js and TypeScript, or PHP), the database (MySQL or MariaDB), user accounts and authentication, admin tools and the integrations the app depends on.
Yes. App Wizards takes care of the launch: test builds through TestFlight and Google Play testing tracks, store listings and screenshots, privacy details, app review and release. Store accounts are set up in your name, so the apps belong to you.
Yes. Apps can take payments through Stripe, run subscriptions, pay out to other users with Stripe Connect, or use in-app purchase where the App Store and Google Play rules require it. SimplyRoam VPN, for example, sells subscriptions through in-app purchase on mobile and through Stripe on the web.
Yes. App Wizards adds push notifications and wires them to the events that matter, such as an order update, a booking, a parcel arriving or a reminder, and sends email or SMS alongside where it helps. HolaParcel, for example, alerts residents by SMS and email when a parcel arrives.
It can. Data can be stored on the device so the app opens and works without a signal, then syncs when it is back online. SimplyTrips, for example, keeps trips on the device with iCloud backup. Which parts work offline is agreed during the discovery call.
Yes. App Wizards adds AI features to apps through large language model APIs called from the app backend, such as conversational help, smart search and features that understand what a user types or says. The same team built SimplySIM for Claude, a Claude plugin and public MCP server that lets an AI assistant search, compare and hand over a secure payment link.

Working with us

Yes. App Wizards is the app studio of Digital Wizards, a UK-based in-house team working with clients across the UK and internationally. Nothing is offshored, so you always talk to the people actually building your app.
Yes. App Wizards works with start-ups and established businesses alike, with a personal, hands-on approach. Start-ups get the same engineering as larger clients, from the first discovery call and the first version through to launch, with the people building the app as the main point of contact.
You do. The code is yours, and the App Store and Google Play developer accounts are set up in your name, so the app, its listings, its users and its data belong to your business. There is no platform lock-in.
Yes. Apps need updates to keep up with new iOS and Android versions, store rules and user feedback. Ongoing support, fixes and new features can be agreed as part of the proposal, so the arrangement matches how the app is expected to grow.
Yes. App rescue starts with a review of the existing code, backend and store setup, followed by a clear plan to stabilise, fix and finish the app, or to rebuild the parts that hold it back.
Nothing formal is needed: a clear brief or just an idea is enough to start. If you have them, it helps to share what the app should do, who it is for, apps you like, any existing systems it must connect to, a target launch date and a rough budget. The free discovery call fills in the rest.
Send a message through the contact form on this page or email info@digitalwizards.co.uk. App Wizards replies within 1 business day, arranges a free discovery call to understand the app, and then sends a detailed proposal with timeline, approach and a fixed price.
Yes, through our sister studio Digital Wizards (digitalwizards.co.uk). App Wizards focuses on mobile apps; websites, web applications, software, SaaS platforms, eCommerce and digital consultancy are built by Digital Wizards, the same in-house team. Visit Digital Wizards (opens in a new tab)

Still have questions? We're happy to talk through your app in a free, no-obligation discovery call. Contact us

Start your app.

Whether you have a full spec or just an idea on the back of a napkin, we'd love to hear it. Let's build something people keep.

What happens next?

  1. We review your enquiry and reply within 1 business day.
  2. A free discovery call to understand your app, your users and your goals.
  3. A detailed proposal with timeline, approach and a fixed price.
  4. Kickoff, with regular updates and test builds on your own phone.

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