Apps for work where the signal drops: data is stored on the phone, work doesn't stop, and everything syncs by itself once the connection returns.
Only what the user needs for their work, and what their rights allow, is downloaded to the phone.
Tasks, forms, photos, videos, signatures and used parts are filled in just as they are online.
Changes are written to a local database and queued until they can be sent.
Once the connection returns, the changes are sent by themselves, without the user pressing anything.
When several people changed the same record, rules agreed in advance apply: nothing disappears silently, and the history shows who changed what.
With a connection, updates reach the phone at once; an urgent task, for example, arrives with a push notification.
Example: a simplified diagram.
The app on the phone
Changes go up in batches
Only new data comes down
Sync server
Conflicts resolved on the server
Other devices
Get the changes in real time
SQLite on the phone, a change queue, conflict rules and access rules for each user.
The day's work is available offline too.
Fields are checked on the phone itself, so mistakes are caught at once, even offline.
Saved on the phone and sent once the connection is back.
Calls to customers are logged against the task, and push notifications flag important changes.
A payment link can be sent to the customer straight from the app.
Products, equipment and documents are recognised with the phone's camera.
Devices are configured over Wi-Fi or Bluetooth straight from the app.
Flutter is added to an existing iOS or Android app step by step, and a web app can run inside a native shell that updates without a new store release.
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
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
We set a rule in advance for each type of data: for example, the latest change wins, different fields are merged, or a person decides. Nothing is lost silently, and the history shows who changed what and when.
Yes. We build the app with Flutter, so one codebase serves both platforms and the features are the same on iPhone and Android.
Yes, step by step. We add offline work in stages, so the app doesn't have to be rewritten, and users get the new features with their usual updates.
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