Sync & reminders
Offline sync & reminders on the app
Offline todo sync on iPhone/Android — work without network, push reminders, one account across devices.
What you'll learn
- Sign in with one account on mobile and web
- Work offline on your phone and sync when online
- Enable push reminders for tasks
- Understand repeat and calendar sync (Premium)
Before you start
| Platforms | iOS (TestFlight) · Android — primary guide. Web/desktop: footnote at end of section if different. |
| Install | iOS: TestFlight (board link). Android: APK / Play internal when available. |
| Plan | Mixed — offline sync on Free; repeat/calendar sync Premium |
| Prerequisites | Signed in to the app; allow notifications when prompted. |
Free: Mobile offline sync, basic reminders.
Premium: Task repeat, time/duration, external calendar sync (up to 2 accounts).
Steps
1. One account, all devices
Sign in with the same email in the iOS/Android app. Tasks, habits, and goals sync via cloud — changes on your phone appear on web (and vice versa).
2. Offline on mobile
Without network, you can still view and edit tasks on the Home tab. The app stores locally; when online, changes merge to the server.
3. Enable task reminders
Tap a task → Task detail → Reminder → pick a time (e.g. 30 min before due). Allow notifications on iOS/Android if prompted.
4. Repeating tasks (Premium)
Long-press a task → Repeat (daily, weekly, etc.) — Premium feature. On Free: create tasks manually or use habits for recurring work.
5. External calendar sync (Premium)
Go to More → Settings → Calendar sync, connect Google or another calendar (up to 2 accounts). Events and tasks can appear together on Calendar.
Mobile tips
- Check notification permissions on iOS/Android if reminders don't arrive
- Quick Add on Home adds tasks fast — syncs when network returns
- Don't share passwords; use your own account for personal workspace
On web/desktop: Right-click → Repeat; desktop Quick Add ⌘⇧Space.
How sync works
DonDon stores your tasks, habits and goals in the cloud, so the phone and the web show the same data. Sign in with the same account on each device and changes appear everywhere. On mobile, the app stores data locally as well, which lets you keep working without a connection.
Working offline
Without a network you can still view and edit tasks on Home. When the connection returns, your changes merge into the server. This helps on a train or in a lift: capture the task now and let it sync later.
Getting reminders to arrive
- Allow notifications for DonDon in your phone settings.
- Give the task a due date and time, then add a reminder.
- Keep the app signed in so scheduled reminders are known to the device.
If a reminder does not arrive, check notification permissions first, because that is the most common cause.
Premium sync features
Repeating tasks, time and duration, and external calendar sync are Premium. You can connect up to two Google calendar accounts, so events and tasks appear together on the calendar.
Tips
- Sign in on a second device and check that a new task appears. It is a quick test that sync works.
- Do not share your password; use your own account.
Common mistakes
- Using two different accounts and wondering why data differs.
- Expecting offline edits to appear on the web before the phone is online again.
Related guides
Try DonDon on your phone
Install on iOS (TestFlight) or Android — your account syncs with web. Sign up free if you don't have an account yet.
Frequently asked questions
- Does DonDon work offline?
- Yes — mobile supports offline sync; changes merge when you're back online (Free and Premium).
- Are task reminders on Free?
- Basic reminders are on Free. Task repeat and some advanced time options need Premium.
- What does external calendar sync need?
- Premium — up to 2 external calendar accounts. See [Calendar & time block](/guides/calendar-time-block/).
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