Fintech
Sr. Pago
Native Swift and Kotlin apps with Bluetooth to an MPOS-type card reader, OneSignal and a transactional backend.
- Bluetooth
- MPOS reader
- OneSignal
- Notifications
- iOS+Android
- Native
PXL MOBILE
Most requested
Mobile apps people actually use.
We design and build native or cross-platform iOS and Android apps (React Native and Flutter), ready to scale from day one. Experience design, production code and post-launch support included.
- 2 to 6 months
- Typical duration
- Team depends on scope
- Team
- PXL Project, PXL Dedicated or PXL Flex
- Model
What's included
Everything needed to launch a serious app.
We do not hand over the binaries (IPA/APK) and disappear. We hand over a product with support, observability and a route for it to evolve. If you have not validated the problem yet, we recommend starting with PXL Discovery.
Discovery and product design
User research, flow mapping, information architecture and a navigable Figma prototype before touching code.
UI design for iOS and Android
A design system, components and dark mode. Pixel-perfect on both platforms.
Native or cross-platform development
Swift / Kotlin when performance matters, React Native or Flutter when time-to-market and a single codebase are what is critical. You decide, with our recommendation.
Backend and API
If your app needs it, we include the backend: Node or Python, PostgreSQL, authentication, push notifications and media storage.
Integrations
Payments, analytics, CRMs, ERPs, corporate SSO, wallets, biometric signature. Complex integrations with hardware or legacy systems.
Publishing to the stores
We handle App Store Connect and Google Play Console: assets, descriptions, privacy policy and the review process.
QA and testing
Unit, integration and E2E tests. Testing on real devices, canary releases and automated rollback. For hardening and pentesting.
Support and evolution
5-month warranty after delivery or launch. Optional continuity with PXL Flex and PXL Dedicated.
Who it's for
Is PXL Mobile what you need?
We'll help you decide quickly. If we are not the right match, we point you to who is.
This is not for you if…
- You need a clone of an existing app, "exactly the same and as cheap as possible"
- You only want the binaries (IPA/APK) with no product strategy and no post-launch support
- You have not defined the problem you are solving (that is where it starts)
- You are looking for the cheapest supplier rather than the team that builds it right first time
This is for you if…
- You have a validated idea and need to turn it into a usable app within a few months
- Your current app no longer scales, or is rated below 4.0 in the stores
- You need a corporate mobile app with complex integrations into your backend
- You are launching in several markets and need multi-language and multi-region support
- Your internal team needs senior support while it builds its own mobile unit
Problem
What it costs when a mobile app is built badly.
Many companies build mobile apps with the logic of a website, without considering the constraints and opportunities unique to the channel. The result is apps that get installed but not used, get rejected by the stores, collapse under real traffic, or need rebuilding in 12 months. On mobile the margin for error is smaller: if the app crashes or loads slowly in the first session, the user deletes it and does not come back.
A rating below 4.0 in the stores, eroding organic discovery
Intermittent crashes on specific devices or versions that nobody can reproduce
App Store or Google Play rejections that delay launches by weeks or months
Apps that look good on the flagship but fail on the devices the market actually uses
Day-30 retention below 25% because the onboarding does not hook in the first screens
Outcomes
Impact on installs, retention and revenue.
A well-built mobile app stops being "one more channel" and becomes the main point of contact with the customer. It increases retention, generates predictable revenue, reduces support cost and captures behavioural data no other surface gives you. The difference between an app opened every day and one forgotten on the second screen lies in architecture, design and product decisions taken before the first line of code.
Apps with good reviews that bring organic installs without spending on ads
Fewer crashes in production, and support tickets that fall month after month
A new direct revenue channel: subscriptions, in-app purchases and native commerce
Real behavioural data informing product and marketing decisions
Code that scales to millions of sessions without having to redo the architecture
Process
From idea to the main marketplaces in 4 clear steps.
Discovery
Sessions with your team, user research, information architecture and an agreed product document.
UI/UX Design
A navigable Figma prototype, a design system, and usability testing with real users before coding.
Development
Iterative sprints with regular demos and builds installable on your phone via TestFlight and Firebase App Distribution.
Launch
Final QA, publication to the stores, monitoring, documentation and handover to maintenance with PXL Flex and PXL Dedicated.
Related case studies
Projects where this service played the leading role.
Consumer / Pets
DigiPet
Flutter app for vaccination records, medical history and lost-pet alerts, with subscriptions via in-app purchases.
- Flutter
- Cross-platform
- RevenueCat
- Subscription management
- In-App Purchases
- Recurring payments
IoT / Consumer
Alxedo
Native Swift and Kotlin apps, with Stripe payments and remote control of the smart water purifier.
- IoT
- Hardware + app
- Stripe
- Subscription
- iOS+Android
- Native
Stack | Tools | Standards
The technologies we use on PXL Mobile.
Native when the case demands it, cross-platform when it makes sense. A stack proven on apps with thousands of active users.
- iOS
- Swift
- Xcode
- Android
- Kotlin
- Android Studio
- React Native
- Flutter
- Dart
- TypeScript
- JavaScript
- Node.js
- Express.js
- GraphQL
- PostgreSQL
- MySQL
- Redis
- Firebase
- AWS
- Google Cloud
- FCM
- APNs
- Mixpanel
- Amplitude
- Sentry
- Stripe
- Conekta
- Auth0
- Fastlane
- GitHub
- App Store
- Google Play
- RevenueCat
- OneSignal
- TestFlight
- Firebase Crashlytics
- SwiftUI
- Jetpack Compose
- Maestro
Frequently asked questions
What almost everyone asks.
Native, React Native or Flutter? Which suits me?
It depends. If graphical performance or access to very specific operating-system APIs is critical (AR/VR, live video, deep banking integrations), we recommend native. For 80% of the products that reach us, such as SaaS, standard fintech, e-commerce or internal management, React Native and Flutter give indistinguishable quality in half the time with a single team. In discovery we give you our recommendation with the technical and economic arguments, and you decide.
What does an average app cost?
It depends on the number of flows and whether it's native (Kotlin on Android, Swift on iOS) or cross-platform (React Native or Flutter). In terms of time, a typical build takes between 2 and 6 months depending on scope.
Do you publish the app on my Apple and Google accounts?
Yes, we publish under your developer accounts so app ownership stays with you from day one.
What happens after launch?
We offer ongoing support and maintenance (bug fixes, OS updates, new versions) through our PXL Dedicated or PXL Flex models, depending on how constant a level of support you need.
What if I already have an app built by another supplier?
We start with a short technical audit through PXL Audit Technical to understand the real state the code is in, before proposing whether it's better to build on that base or rebuild critical parts.
What devices do you develop for?
Beyond smartphones and tablets on iOS and Android, we build components for smartwatches (Apple Watch and Wear OS), Apple TV, and Android TV, and we can integrate with CarPlay and Android Auto when the project requires it. We also publish to Huawei's AppGallery when a project needs it.
Related services
An app in production needs three more things to avoid breaking.
PXL EXPERIENCE
PXL Experience
UI/UX Design. Design based on behaviour and conversion, validated with real users.
PXL CLOUD
PXL Cloud
Cloud architecture. Infrastructure that scales with you, not against you. AWS, GCP and Azure.
PXL SECURITY
PXL Security
Security & pentesting. Hardening, compliance and vulnerability auditing. Because building well is not enough if it is not secure.
Ready to put your app into production?
A free 30-minute exploratory call. If there is a match, you have a proposal within 5 working days.