Subscriptions do not auto-renew. For any package that you purchase, you would gain access to Simply Log Pro for the package’s stated duration.

You are allowed to “stack” your subscriptions through making multiple purchases.

For example:

  1. You made the first purchase for a 1 month package on 01 June 2020 at 0000z. The package expiry is now on 30 June 2020 2359z.
  2. on 07 June 2020, you decide to extend your package. You make a second purchase for a 1 month package. The new package expiry is now 30 July 2020 2359.

To manage your Simply Log Pro Subscription, you can go to the “More” tab and click on “Manage Subscription”.

Take not that subscriptions are tied to your App Store account (which may or may not be the same iCloud account).