On the phone

The Android app “Undan” shows the same archive — the files that Syncthing brings to the phone. There is no server and no account: what you change on the go comes back to the desktop as a file.

At the bottom there are four places.

Files#

The folder tree. A tap on a folder expands it, a tap on a file opens it:

• Notes and text files in the editor — the same as on the desktop, with a bar of characters above the keyboard (checkbox, bullet, heading, bold, indent). Save writes the file; Back asks if anything is still unsaved. The arrow on a [[Verweis]] opens the note behind it.
• PDFs and images are shown by the app itself. Zoom in with two fingers.
• Everything else shows the text the search knows. Open with … hands the file to another app.

New note at the top creates a note in the notes folder (Settings).

Long press on a file or folder opens the actions: Rename, Move to …, New folder inside, Move to trash. Afterwards, the bottom of the screen says what happened, with Undo. The phone keeps its own journal in the archive: on the desktop you see the steps in the History, deleted items are in the trash there, and bookmarks and open notes follow a rename by themselves. Every save in the editor leaves a version that the desktop can restore — for as long as set on the desktop under Settings → Retention (default 30 days). Cleanup happens only on the desktop.

Search#

Full text across the whole archive, with the same rules as on the desktop. A hit opens the file. The phone doesn't read (OCR) anything: it finds what the desktop has already read. Re-index picks up what Syncthing has just brought; at startup this happens by itself.

Tasks#

The views Today, Upcoming, Week, Due, All, Done — and Projects: areas, below them the projects with the number of their open tasks. A project shows its tasks in the order of the note, under their sections.

• Swipe completes (in Done: reopens). The checkbox in the note is ticked as well.
• Tap shows the details and, with Open note, takes you into the note.
• Tap at the bottom to create — a sentence like on the desktop: “Vito-Schein Freitag nachmittags #auto”. The task then is in the Inbox.

Calendar#

At the top the month, below it the selected day as a list. A dot under the number means: something is on that day, in the calendar's color. Swiping flips the month, ☰ hides and shows calendars, ↻ refreshes.

Without anything further, the calendar shows the tasks. For events from Google, connect the account once on the desktop (Calendar); the credentials are stored encrypted in the archive. On the phone, Settings → Calendar → Unlock with the vault passphrase is then enough (the computation takes a few seconds).

Editing events: tap an event, then Edit — title, time, calendar, location, notes, alerts. Changing the start moves the event: the end moves with it. Event above the day list creates a new one on the selected day. Events with attendees and calendars that are only read are not changed by the app — the sheet then says why. For writing to work, the account must have been (re)connected on the desktop after 18 September 2026.

Alerts: the phone notifies you at the set time — for events as set in Google, for tasks with a time 30 minutes before, for tasks with a deadline at 9:00 on the day. Turn them off under Settings → Calendar. Two things you should know: the phone syncs hourly in the background and alerts you about what it knew at that point — an event that someone adds shortly before can be missing. And for Google events, Remember on this device must be checked when unlocking the vault; otherwise the phone only alerts you about tasks.

Join conference: as on the desktop, 10 minutes before an event with a video conference a button appears at the bottom right — above every place (above the bar at the bottom) and above an open file, and above the keyboard when it is open. It stays until 10 minutes after the end. A tap opens the conference — in the provider's app if it is installed (Zoom, Teams, Meet), otherwise in the browser. The × closes this button until the app is closed; rotating doesn't change that. Which events get a button and where the link comes from is described under Calendar, “Join conference”. The phone only reads what the calendar has already fetched — it doesn't ask Google separately.

Dictation probe#

An experiment, not dictation yet: Settings → Dictation probe measures how fast and how well two recognizers transcribe on this phone — Nemotron inside the app and the system recognizer (Google's on a Pixel). Both hear the same German sample (15 seconds of Kafka) or the microphone.

• Download under Nemotron fetches the model once (682 MB, preferably on Wi-Fi). It is stored in the app's own storage, not in the archive; Remove frees the space.
• Download German appears when the system recognizer lacks the language pack; the system then asks by itself.
• Choose Sample or Microphone, then Nemotron, System or Both. With the microphone, speak and tap Stop. For the system recognizer the app asks once for the microphone, also for the sample.

Under Results each run shows when the first word came, how far each word lagged behind what was spoken, how long it took after the last word, the word errors (sample only), memory and computing load. Share sends them as a file. Stay on the page while something runs.

Setup#

The app needs All files access, because the archive lies outside its own folder; the path is in the settings (⚙), where you can also browse for it.