Bloopsik

Bloopsik is a 2 in 1 app. It is a smart reminder app that will help you setup reminders about a specific Bluetooth device. If you leave your home and forget this specific device, you will get notified. This app simultaneously also works as a Bluetooth device scanner and can help you find your lost Bluetooth devices.

The second part of this app is free (with ads). The first part has a 7 day trial period (no monthly subscriptions and no credit card information is needed, just a small one-time payment.)