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Mobile app UI/UX design

We design the flows and screens of a mobile app before we build them, then implement the design as a Flutter theme and component set rather than a static mock-up. The result is an interface that follows Material on Android, feels right on iOS, and stays consistent as the app grows.

Deliverables
User flows, wireframes, screen designs, Flutter theme and components
Platforms
Android (Material) and iOS (Cupertino conventions)
Includes
Onboarding, empty states, errors, dark mode, accessibility, localisation
Evidence
Editor, batch and inspector interfaces in our published apps
Discuss your app See our work

User flows before screens

Most usability problems are flow problems, not visual ones. We start by mapping the main journeys: first launch, the core task, the paid upgrade if there is one, and recovery from errors. Only then do we design screens, so each screen has a known job in a known sequence.

What a UI/UX engagement covers

  • Onboarding that reaches the first useful result in as few steps as possible
  • Navigation structure: tabs, drawers and flows chosen for the app's size
  • Screen designs for every state: loading, empty, error, offline and success
  • Editor and tool interfaces, such as canvases, sliders, brushes and batch lists
  • Subscription and paywall screens that follow store rules
  • Dark mode, dynamic text sizes and colour contrast
  • Localisation-ready layouts (our MetaClean app ships in English, Spanish and Urdu)

Design implemented as a Flutter design system

Because we build what we design, the hand-off is a Flutter theme: colours, typography, spacing, component styles and reusable widgets. That keeps screens consistent, makes dark mode a theme switch rather than a redesign, and means later features inherit the design instead of drifting from it.

Interface patterns from our own apps
PatternWhere we used it
Single-screen tool flow: import, adjust, preview, exportCropFlow
Canvas editor with brush, loupe and before/after compareBG Remover AI
Batch selection and progress for many filesPhoto Compressor & Resizer, HEIC Converter Pro
Frame timeline editor with per-frame controlsGIF Maker
Risk scoring, inspector and audit views for technical dataMetaClean

Accessibility and platform conventions

We test at larger text scales, check contrast, label controls for screen readers and respect platform gestures such as back navigation on Android and swipe-back on iOS. Some of our apps include automated smoke tests at larger text scales for this reason.

Evidence: mobile app ui/ux design in our own apps

These are CarrySo's own products, published on Google Play under our developer account. Figures are taken from Google Play when this site was built; each card links to the case study.

Frequently asked questions

Do you design in Figma?

We can work from your Figma files or produce flows and screen designs before the build. Our final deliverable is always the implemented Flutter theme and components, because that is what users see.

Can you redesign an existing app?

Yes. We review the current flows, analytics and store reviews, identify where users stall, and redesign in stages so improvements ship without a big-bang rewrite.

Should the app look the same on Android and iOS?

The brand and layout should be consistent; platform-level details such as navigation transitions, pickers and alerts should follow each platform. Flutter lets us do both from one code base.

Mobile app development

Mobile app development from idea to app store: Flutter apps for Android and iOS, SaaS mobile apps, MVPs, UI/UX, backend APIs, store deployment and maintenance.

Flutter app development

Flutter app development for Android and cross-platform apps: architecture, state management, Firebase, on-device processing, testing and store release.

MVP app development

Launch a focused mobile MVP with Flutter: tight scope, real users on the app store, crash reporting and remote config, so you learn fast and iterate.

SaaS mobile app development

Mobile apps for SaaS businesses and mobile-first SaaS products in Flutter: subscriptions, auth, onboarding, dashboards, payments, push, APIs and admin panels.

Tell us what you want to build. We'll reply by email with questions, and then with a proposed scope and estimate.

Start a project Email carrysoofficial@gmail.com