Free Trial Guardian by Loomwood Digital

Free Trial Guardian watches for free-trial signup pages and offers to track the trial with one click. It reminds you two days before the trial ends and again on the end date, so you never get silently charged for a subscription you forgot to cancel.

Everything runs entirely on your device. There is no account, no login, and no data ever leaves your browser -- trials are stored locally and reminders fire from local alarms.

The free tier tracks up to 3 trials at once. A one-time unlock (from the Loomwood Digital store) removes the limit for unlimited tracking.

Features:
- Automatic detection of free-trial signup pages
- One-click tracking with a smart guess at the trial length
- Reminder notifications 2 days before and on the trial end date
- Manual add for trials it didn't catch
- 100% local: no account, no tracking, no data collection