We design, build and publish your app with Flutter: one codebase, two stores, a smooth and polished app. Then we keep it alive, release after release.
As an iPhone and Android developer, Devolim designs, builds and publishes mobile apps for businesses, shops and people with an app idea. We work with Flutter: a single codebase produces both the iPhone app and the Android app. We handle the design, the back end, publication on the App Store and Google Play, and the updates that follow. At the end of the project, the source code and every account access belong to you. Ten of our own apps are already live, and we reply to every enquiry in under 24 hours.
From the first screen to launch: design, development, back end and publication. One point of contact from start to finish.
Screens designed for your audience, and tested on a phone before development starts.
A single codebase for iPhone and Android, as smooth as a native app.
Sign-in, database, notifications, payments and subscriptions.
App Store and Google Play listings, screenshots, Apple and Google review.
Updates for every new version of iOS and Android, fixes, new features.
Shown here with Estimation Objet, one of our apps. Everything around it, we can build into yours.
Flutter is the technology Google created for building apps. We use it for all 10 of our apps. Here is what it changes for you, in plain terms, with the technical words for those who want to dig deeper.
The same code produces both the iPhone app and the Android app. Here, Estimation Objet, one of our own apps.
We write the app once and it ships on both iPhone and Android. One project to fund, test and develop further.
The app is compiled into real machine code for the phone. It isn't a website in disguise: it starts quickly and responds instantly.
Flutter draws every pixel itself. Animations follow the screen's refresh rate, up to 120 frames per second when the phone supports it.
Your app looks exactly the same on every phone, with your colours and your fonts, no compromises.
A new feature is built once and lands on both stores the same day. During development, every change shows up live.
Camera, GPS, notifications, Face ID, widgets, payments: whatever the phone can do, the app can use.
So when is native the better choice? For an app that relies almost entirely on one very specific phone feature, such as advanced augmented reality or a smartwatch. If that is your case, we will tell you from the very first conversation.
The app on the phone is only the visible part. Behind it, a server holds the accounts and the data, sends the notifications and does the processing. That is the back end, and we build it too.
The back end
Already have software or a server? We connect the app to it through an API, so it can read and write your existing data. And whichever option you choose, the back-end code belongs to you, just like the app code.
An app can make money in several ways. We help you choose the right one, then we set it up, from the buy button to revenue tracking.
Monthly or yearly, often with a few days of free trial. The most common model today.
Unlock an option, some content or a lifetime Premium version with a single payment.
The app is free for everyone, and the advanced features are kept for the paid version.
A free app funded by banners or videos, which users can remove by going Premium.
Selling a subscription in an app means handling free trials, renewals, refunds and two different stores. RevenueCat takes care of all that, and we integrate it for you.
StoreKit and Play BillingReceipt validationRemote paywallsMRR, churn, A/B testsYou have an idea for a consumer app: we build it and publish it on the stores, free, paid or subscription-based.
Appointments, ordering, loyalty cards: the app that brings your customers back.
Your customers follow their files, message you and find their documents.
Out in the field, your teams fill in, photograph and send, with no paperwork.
What we hand over at the end of the project, explained and ready to use.
Designed, built and published by Devolim, with the same method we would use for your project.
You describe your project, we ask the right questions and choose the simplest solution with you.
The key screens, clickable, so you can approve the flow before any development starts.
Test versions throughout the project, on your phone or computer, so you can see things moving.
We put your project live, then handle maintenance and new features.
Another question? Write to us or call +33 6 52 45 78 89.
You do. At the end of the project, we hand over the source code, the documentation and every access. You can carry on with us, or with anyone you like.
It mainly depends on the number of screens and what sits behind them: accounts, payments, AI. After our first conversation, we give you a precise schedule, step by step.
One codebase for iPhone and Android: one project to fund and develop instead of two. All our apps are built this way. If your project calls for native, we will tell you.
Yes: listings, screenshots, and answering Apple's and Google's questions during review. We publish our own apps the same way.
An app lives on: new versions of iOS and Android, user feedback, new ideas. We take care of the updates and new features.
Yes, on the versions of iOS and Android still in use. We test on real devices before every release.
Yes. We first review the code and the state of the app, then suggest either developing it further or rebuilding it.
An app, a tool, a website, AI or a video: tell us about your idea in two minutes.
