Apps

Sigelith apps for Windows, Android and Wear OS

Stamp and verify on your computer, keep the @beat on your phone and on your wrist.

WindowsSigelith Desktop · Sigelith Backup AndroidBeatTime · Sigelith Courier · Sigelith Delivery Wear OSBeatTime Watch Face

On your Windows computer

Windows app

Sigelith Desktop

Sigelith Desktop timestamps files without uploading them, verifies proofs offline, watches the public log’s witnesses and hands over files with proof of delivery.

Download from the Microsoft Store: Sigelith Desktop
Manual, tips and screenshots
Companion app · Windows

Sigelith Backup

Sigelith Backup makes versioned, optionally encrypted backups of your folders on an external drive — and with Sigelith Desktop it also keeps every stamped document exactly as it was stamped, together with its .beatproof file.

Download from the Microsoft Store: Sigelith Backup
About Sigelith Backup

BeatTime for Android

Android app & widget

The @beat clock on your home screen.

A live @beat clock widget with swappable watch faces, a second dial for your local time, and a built-in time ↔ beat converter. No account, no ads, works offline.

Get the Android phone app on Google Play Get the watch face pack for your Wear OS watch

On Google Play, our Android apps are published by Konveria, an independent company in Kraków with no personal or capital ties to us; it also runs the second key server and one of the cosigners.

Watch faces

A whole set of built-in faces. Pick a global default in the app — or set a different face per widget (long-press a placed widget → configure).

@523BEATTIME
Dark
@523
Minimal
@523BEATTIME
Accent
@523 · 14:21
Dual
@523BEATTIME
Light
@523
Big
Ring (live)
@52314:21
Ring + time
@52314:21
Dual ring
Orbit
@52314:21
Ticks
@523
Tick clock
@523
Outline

Sigelith Courier for Android

Android app for couriers

Sigelith Courier

Proof of handover confirmed by the recipient’s key and completed by a public stamp. Recipients confirm on their own phone, in any browser — nothing to install.

Google Play · coming soon
How it works and how to use it

Sigelith Delivery for Android

Android app for recipients

Sigelith Delivery

Hold your phone to the courier’s and confirm with your fingerprint. The shop gets a confirmation signed with your own key, and its fingerprint is stamped in the public Sigelith log.

Get it on Google Play
How it works and how to use it

On your wrist

Second app · Wear OS

A real watch face for Wear OS — a separate app that lives on the watch itself. 13 styles, picked in the watch's own face editor. Requires Wear OS 4 or newer.

Get the watch face pack for your Wear OS watch
BeatTime Watch Face — a separate listing on Google Play.

The facts — the app in brief

Why the Android app

Works offlineThe clock keeps ticking from your device clock and syncs to the server when online.
A face per widgetPlace several widgets, each with its own look — Dark, Light, the live Ring and more.
Built-in converterTranslate any local time to @beat and back, right inside the app.
No tracking, no adsNo account, no analytics, no data collection. Just time.
Server-accurateSyncs to our NTS-backed server, so the beat you see is the real one.
Google CalendarAdd @beat to your meetings so every guest sees the one universal time.
Full-screen clockA big @beat clock for your desk — or the cover screen of a flip phone.
Speaks your languageAvailable in 11 languages — follows your phone, or pick one in the app.
FreeThe app, the widget and the API are free.

More than a clock

Living in .beat comes with things no timezone app can honestly copy.

The BeatOnce a day, one moment for the whole planet — drawn provably from the sealed weekly Merkle root. Opt-in only; the notification is scheduled on your phone, not pushed.
Beat handshakeTwo phones co-sign one @beat with device keys — a meeting sealed forever in the public proof log. Who you met stays on your phones.
Meet at @beatInvite with a link or a QR card — everyone sees the same moment in their own local time. Pick a date, or just say 'the next @750'. See an example
Time capsuleWrite a message to the future. It opens at the @beat you choose — and its timestamp is provable from day one.
Focus in beatsA work timer that counts in .beat: 20 beats in, 5 beats out. No notifications, no account.
Beat collectionCatch @000, the triples and the elusive mirror beats — plus badges for handshakes and The Beat.

Stamp your photos with @beat

Give every photo its moment in universal time — the @beat is embedded in the file, and optionally drawn on the image.

A collector coin in a capsule, photographed on fabric — the kind of photo worth stamping.
  • Embedded in EXIF — Invisible metadata, readable by any photo tool.
  • Optional watermark — A subtle @beat drawn on the photo.
  • Share from your camera — Take a photo, tap Share → BeatTime — it stamps it and saves it back.
  • Verifiable proof — The photo's SHA-256 is recorded in the public proof-of-existence log — timestamped, signed and anchored to Bitcoin. See proof →
  • Any file, not just photos — PDF, video, archive: hashed on your phone and stamped in the same public log.
The @beat clock  ·  Developer API →