Mobile app development for iOS and Android

Apps people keep on their home screen, from the first store release to years of OS updates.

  • Kotlin
  • Swift
  • Android
  • iOS
  • Firebase

What we build

Mobile apps we design, build and publish

We do not only build apps for clients, we publish and run our own: Sera, a private cycle tracker on iOS and Android trusted by thousands of users, an app that records from DJI wireless microphones over Bluetooth, and games on Google Play. So we know the whole road, from choosing between native and cross-platform to store review, privacy rules and keeping an app working through every new version of iOS and Android.

  1. 01

    Consumer apps for iOS and Android

    Polished public apps built for ratings, retention and reviews, published under your own developer accounts.

  2. 02

    Internal apps for teams in the field

    Tools for technicians, sales and service staff that are quick to use on the move, even with a weak signal.

  3. 03

    Apps for Bluetooth and connected devices

    Pairing, streaming and control of hardware over Bluetooth, the same kind of work as our DJI Mic Recorder app.

  4. 04

    Privacy-first apps for sensitive data

    Health and personal data kept on the device where possible, encrypted where it travels and never shared by default.

  5. 05

    Backends for mobile apps

    Accounts, sync, push notifications, analytics and admin tools, built together with the app so both sides fit.

  6. 06

    Mobile games and interactive apps

    Arcade and casual games with smooth performance and store-ready polish, like the ones we publish on Google Play.

Typical problems we solve

Decisions and problems we help with

  • Native, cross-platform or both?

    We weigh your features, the device access you need, budget and future team, then recommend Kotlin and Swift, a shared codebase or a mix, and explain what each choice costs later.

  • The app works in the office but fails in the field.

    We design offline-first: data is saved on the phone, synced when the connection returns and conflicts are resolved by clear rules instead of lost edits.

  • Store review keeps rejecting releases.

    We know the App Store and Google Play guidelines from publishing our own apps, and prepare permissions, privacy declarations and review notes before the build goes out.

  • Every OS update breaks something.

    We test on current and upcoming iOS and Android versions, keep dependencies current and track crashes, so updates are routine instead of emergencies.

Own products

We ship and run our own software, too.

Products we design, build and operate ourselves, used by real people every day. Your project gets the same care.

  • Cycle and intimacy tracker

    Sera

    A private cycle and intimacy tracker built for women who value privacy. Deployed on iOS and Android and trusted by thousands of users.

  • Bluetooth audio recorder

    DJI Mic Recorder

    Records from DJI wireless microphones over Bluetooth, straight on your phone, and keeps you in control of your sound.

    Independent app, not affiliated with DJI.

  • Arcade, casual and story games

    Our games

    Pigeon Payback, Piggy Whack and MyTale: small worlds we build for fun, published on Steam, Google Play and the App Store.

How we work

From idea to the app stores, and beyond

How every engagement runs

  • Clear scope and estimate

    You know what you get, when, and what it costs before work starts.

  • Working software early

    Short iterations with results you can see and test.

  • Transparent communication

    Direct contact with the engineers, regular updates and no surprises.

  • Support after release

    We stay responsible for what we delivered.

Start a project

Questions and answers

Frequently asked questions

  • Should we build native apps or one cross-platform app?

    Native Kotlin and Swift give the best performance and full access to device features such as Bluetooth, sensors and background work. A shared cross-platform codebase can lower the cost when the app is mostly screens, forms and data. We recommend based on your features, not on habit.

  • Do you publish the app to the App Store and Google Play?

    Yes. We prepare the store listings, privacy declarations and review notes and submit the app under your developer accounts, so the app, its ratings and its users belong to you. We go through the same review process with our own apps.

  • Can the app work offline and talk to Bluetooth devices?

    Yes. We design local storage and sync for unreliable connections, and we have built Bluetooth communication with hardware in our DJI Mic Recorder app, which records audio from DJI wireless microphones.

  • What affects the cost of a mobile app?

    Mainly the number of screens and user roles, whether you need both platforms at once, offline sync, device integrations and the backend with its admin tools. A focused first version is often the best start: it reaches users sooner and real feedback shapes what comes next.

  • What happens after the app is launched?

    Apps need regular care: updates for new iOS and Android versions, store policy changes, crash fixes and new features. We offer ongoing maintenance, and you always keep the code and the store accounts.

Contact

Tell us about the app you have in mind

Share the idea, the platforms you need and any deadline. We will reply with concrete next steps and the questions that matter most for your app.

What happens next

  1. We get back to you as soon as possible.
  2. A short call to understand your goals and scope.
  3. A written proposal with an estimate. No obligation.

Registered office

Děčínská 552/1, 180 00 Praha 8

Capabilities

Other services

  • Websites

    Fast, search-friendly websites that explain what you do and turn visitors into enquiries.

  • Web applications

    Customer portals, internal tools, dashboards and workflow systems on backends built for real load.

  • Desktop programs

    Cross-platform desktop applications for demanding workflows, specialized hardware and data visualization.

  • Embedded software

    Firmware and control software for devices and specialized hardware, connected to the apps and systems around them.

  • Consulting and architecture

    Requirements, technology choices, architecture review and delivery planning, so you invest in the right thing from day one.

  • Maintenance and support

    Updates, fixes and new features after launch, for software we built and for systems you already run.