Flutter app development
Flutter is the right answer when you want one codebase, an interface that looks the same on both platforms, and one mobile team rather than two. It is the wrong answer often enough to be worth ten minutes of your time.
01Capabilities
Where one codebase and one design language pay off
Flutter earns its place where the interface is custom, the two platforms should look identical, and one team has to cover both. These are the four shapes that arrive, and the fourth is a budget question wearing a technology costume.
- Consumer
Consumer and operations apps
Apps where the same product has to feel consistent on iOS and Android, including ordering and fulfilment flows of the kind in our foodtech work. Flutter renders its own widgets, so consistency is the default rather than a fight.
- Interface
Custom interfaces and motion
Interfaces that are not trying to look like stock platform components. This is Flutter's strongest case: when you want your own design language, drawing your own widgets stops being a drawback and becomes the point. Where the design does not exist yet, that is product design and development before it is a framework decision.
- Companion
Companion apps onto an existing backend
A mobile client for a system that already exists, where the work is the API contract and offline behaviour rather than novel platform integration.
- Team
One team, two platforms
Where the constraint is organisational rather than technical: you have the budget for one mobile team, and two native codebases would mean two of everything, including two release calendars.
02Case studies
A Flutter build already running in production
One published build, in foodtech, where Flutter is part of the delivered stack.
See all case studies
03Fit
Situations where one codebase is the wrong bet
Flutter competes with React Native and with native code, and the honest comparison turns on your team and your device requirements rather than on any benchmark. Five of the six rows below send you somewhere that is not a Flutter project with us, and three of those send you off this site's pitch entirely. We hold no framework loyalty, which is the only reason this table can say what it says.
| Your situation | What we recommend |
|---|---|
| A custom design language that must look identical on both platforms, and no existing mobile team | Use FlutterDrawing its own widgets is exactly what you want here, and one team can hold the whole surface. |
| You already have React and TypeScript engineers shipping a web product | Different pageOur React Native page. Shared language and shared people beat a better rendering model most of the time. |
| Heavy Bluetooth, a camera pipeline, or sustained background location work | Different pageNative Swift and Kotlin, on our iOS and Android page. Plugin gaps here become your problem at the worst moment. |
| You want the app to feel like a stock platform app, matching each platform's own conventions | We argue againstLean native, or accept a standing cost keeping Flutter's widgets in step with two sets of conventions that keep moving. |
| You also want the public website out of the same codebase | We argue againstFlutter web renders into a canvas, so search visibility and accessibility both suffer. Build the web separately, as a normal page. |
| A small team with no Dart experience and a tight first deadline | Not yetDart is quick to read and slower to ship well. Easy to learn and ready for production code are several weeks apart. |
Scope
What we own is the decision and everything after it. That means the plugins you depend on, the upgrade cadence, and whether your own team can still change the app once we stop. unicrew has been building software since 2012, with 100+ senior in-house engineers across six countries. The work runs under an ISO 27001:2022 certified information-security management system. Where the honest answer is a smaller piece of work than the one you came for, you get that answer.
Flutter is a strong choice when the two apps should look and behave the same, because you are writing that behaviour once. It is a weaker one when the value of the product is in feeling native on each platform, or when you depend on hardware features that arrive late in the ecosystem. That is a product decision wearing a technology costume, and it is worth taking it as one.
Andrii BurdaSenior Engineering Manager, unicrew04Delivery
Keeping the two apps identical after launch
One codebase does not stay one experience by itself. Four things we do early, because each is expensive to retrofit once feature work has spread.
- Prove the risky platform integration firstWhatever is closest to the metal, camera, Bluetooth or background work, gets a spike in week one. Plugin limitations discovered in month four are the main way Flutter projects go wrong.
- Fix the state and navigation modelDecided once and written down, before feature work spreads across the codebase. Flutter offers several reasonable options and a codebase using three of them is the usual inherited mess.
- Set up both stores immediatelySigning, provisioning and a real build through both review processes before there is much to review. It removes the two most common late surprises.
- Test on real devices, not simulatorsA device matrix covering the older Android hardware your users actually have. Flutter's consistency claim holds well on modern devices and less well three generations back. Every build goes through the same QA and test automation practice we use on our own projects.
05Stack
The neighbouring choices this page keeps naming
The four decisions the table above sends you to, each with a page of its own.
06Questions
What buyers ask before committing to Dart
Answered the way we would answer them on a call. If yours is not here, it is a good first message.
You can bring our engineers onto your team. What we will not do is supply Flutter developers to a project where Flutter is the wrong choice, which is a real risk when the framework gets picked before the requirements are understood. Design review comes from an architect outside the delivery team, under the same QA and test automation practice as our own projects. Team extension is managed teams; handing over the outcome is mobile app development.
Mostly a question about your existing team. If you already have React and TypeScript engineers, React Native lets them contribute immediately and keeps hiring simple. If you are starting fresh and want a custom interface that is identical on both platforms, Flutter's own rendering engine is the stronger foundation. Anyone who tells you one is simply better has not asked about your team.
Yes, with one caveat worth stating plainly. Your dependency on plugins for platform features is a real maintenance obligation, and a stale plugin becomes a risk the week a new OS version lands. We keep a written inventory of which plugins matter and which are actively maintained, and we plan the upgrade cadence rather than discovering it at the next platform release.
Technically yes, and we would usually advise against it for the public web. Flutter web renders into a canvas, so search visibility, accessibility and text selection all behave differently from a normal page. For an internal tool that can be a reasonable trade. For anything that has to be found in search or read by a screen reader, we build the web separately as a web application.
A scoping call with an engineer. If the app exists we want the repository and the crash data first. If it does not, we want to know the hardest thing it has to do on the device, because that decides whether Flutter is the right call at all. You get back a written recommendation with the reasoning. Most engagements start within two to four weeks.
Three shapes, and which one fits depends on how settled the scope is. Time and materials is billed hourly and quoted per project, which suits work still moving. Fixed price is outcome based and quoted per project, offered once the first read is done. Team extension is billed monthly per engineer. The rate depends on the seniority mix the work needs, so it is quoted rather than listed.
Want the two apps to look and behave the same?
Tell us what the app has to do and what your team already knows. You will get a straight recommendation. That includes the cases where we would not choose Flutter.