Since Us: Anniversary Counter and Relationship Calendar

Since Us is a calendar and agenda app by DerDieDasLian that counts the time you have spent with a partner and surfaces upcoming anniversaries. The app addresses a common need among couples who want a tangible, always-visible measure of their relationship duration without relying on social media reminders or manual date calculation. It solves this by combining a persistent counter—down to the second in live mode—with scheduled notifications for monthly, yearly, and numerically significant milestones, all stored locally on the device with no external accounts required.

Key features

• Displays relationship duration in days, weeks, months, hours, and a live counter that increments every second.
• Schedules customizable reminders for monthly anniversaries, yearly anniversaries, and milestone day counts such as 100, 200, 500, and 222.
• Stores personal moments with a note and photo, with optional yearly reminder support for events like a first date or trip.
• Allows selection of a couple photo with single-finger framing adjustment and supports adding multiple photos for a slideshow.
• Provides two widget types: a love card showing names and days together, and a compact counter that adapts to system color theming.
• Includes a poly mode for managing multiple relationships, each with its own starting date, plus a discreet mode displaying only initials.
• Supports local backup export and peer-to-peer data sync via QR code pairing, with encrypted file transfer that requires no central server.

How to install

1. Tap the download button on this page to obtain the APK file (size: 5.2 MB).
2. When prompted by Android, allow your browser or file manager to install apps by enabling the 'Install unknown apps' setting for that app.
3. Open the downloaded APK file from your notifications or file manager.
4. Tap Install and wait for the process to complete.
5. Open the app; it requires a device running Android 8.0 or higher.

Since Us is built for couples and polyamorous groups who want a private, ad-free tool to track relationship milestones and shared memories. It suits technically inclined users who appreciate open-source software, local data storage, and direct device-to-device sync without cloud intermediaries. Those who celebrate monthly anniversaries or enjoy counting down to quirky numerical milestones like 222 days will find the customizable reminder system particularly useful.

For users who switch devices often, periodically export a backup from the app settings and store it in a safe location. When setting up poly mode, use the discreet mode toggle to keep the home screen widget showing only initials if privacy is a concern in shared spaces.

Since Us delivers a focused, privacy-respecting way to track relationship time without commercial noise. For anyone who values data ownership and clean design in a personal milestone tracker, it stands out as a thoughtfully engineered tool.