If your Apple Reminders are not syncing with Gestimer, there are a few things you can check:
Check Internet Account: Make sure that Gestimer and your other devices are using the same internet account, such as your iCloud account, to sync reminders.
Synchronization Time: Reminders may take a few minutes to synchronize. Since Gestimer writes to the Reminders database, it has no control over when reminders are synchronized. Please wait a few minutes and check if the reminders have synced.
Sync Settings: Double-check that you have the “Sync using Reminders” option enabled under Gestimer’s settings. You can access this by clicking on the Gestimer menu bar icon and selecting “Preferences.”