Schussel

Schussel is German for a scatterbrained, forgetful person: the one who drives off with the lights still on. This app is the antidote. You build a checklist, tie it to a Bluetooth device (typically your car), and when your phone connects, Schussel nags you only if you left something unticked.

You keep one or more checklists. Each list is linked to the Bluetooth device(s) that should trigger it. When your phone connects to a linked device:

* if everything on that list is ticked, you get silence;

* if anything is still unticked, you get a reminder naming exactly what you forgot.

It works even when the app is closed, and optionally sounds an alarm that repeats until you dismiss it.

Features:

* Optional daily reset (per list) — automatically untick everything at a time you choose, with a live "resets in HH:MM" countdown. Lists without a reset time keep their state.

* All data stays on your device — no network, no accounts, no analytics.

How it works:

1. Tap Add list and add the items you tend to forget.

2. Open the list's ⋮ → Settings and choose the Bluetooth device(s) that should trigger it. Optionally name the list, set a daily reset time, and enable alarm mode.

3. That's it. Next time your phone connects to that device with items left unticked, you get a reminder.

Requirements:

* Android 10 (API 29) or newer.

* A phone with Bluetooth, paired with the device you want to trigger on.

Privacy: Schussel stores everything locally and never sends data anywhere — no network, no accounts, no analytics.

Note on background reliability: manufacturer battery optimizers (Samsung, Xiaomi, Oppo, Huawei, …) can delay or drop the connect broadcast; exempting Schussel from battery optimization helps.