Offline-first mobile apps
Your staff can work where there is no signal: data is stored on the phone and syncs as soon as the connection is back.
Mobile apps (iOS and Android)
We build apps for customers who want to order a service, book a time or track an order on their phone, and work tools for staff who spend most of the day away from the office. We connect the app to your systems and publish it on the App Store and Google Play. Later, we update it for new iOS and Android versions and add new features.
Example
Example: a fictional company and made-up data.
Customer app
Staff app
What it covers
- One app for iOS and Android from a shared codebase, with native code where it is needed.
- Customer apps: accounts, orders, bookings and notifications.
- Apps for staff and field technicians: tasks, forms, photos, signatures and maps.
- Offline work: nothing entered is lost, and it syncs later.
- Connections to the systems you already use – CRM, accounting software, online shop (System integrations and APIs).
- Publishing on the App Store and Google Play, or private distribution within your company.
Who it suits
- Your customers order by phone or email, although an app with an account, order history and notifications would suit them better.
- Technicians or other staff work on site, in warehouses or on the road, get their tasks by phone and fill in reports on paper (CRM with a mobile app for your team).
- You already have an app, but it is slow, dated or stops working when the connection drops.
How the work goes
- 1We find out what you need
- 2We analyse and propose
- 3We design the solution
- 4We build in parts
- 5We test and launch
- 6We maintain and improve
Related solutions
Examples of our work
Field technicians' app that works offline
2023–2026
Tasks, customer sites, equipment, van stock and payments – on the technician's phone, even where there is no signal.
Developed continuously since late 2023, it syncs 33 data types to the phone.
Flutter / Dart, SQLite, Node.js / TypeScript, Server-Sent Events
Helper Sync – a sync platform for apps that work offline
2025–2026
Our platform for apps: all data is kept on the device, the app works offline, and changes reach other devices in real time.
It runs at sync.helper.lt, and our own apps use it.
Rust, PostgreSQL, Flutter / Dart, Server-Sent Events
Langer – a messaging and calling app with a built-in interpreter
2026Beta
A messaging and calling app with a built-in interpreter: chats and calls are translated as you talk, so everyone can speak their own language.
The working prototype already translates chats, voice calls and face-to-face conversations, and beta sign-ups are open.
iOS and Android, speech recognition and synthesis, AI translation, real-time back end
Questions and answers
Can the app be distributed only within our company?
Yes. An app for your staff can be distributed privately, so only your employees can install it, not every visitor to the store.
Will the app be able to use the data in our existing system?
Yes. We connect the app to your CRM, business management or accounting system through an API. If the system has no API, we build one.
Got a task or an idea?
Describe it in a few sentences – we'll reply and talk through how we could help.