aCalendar+ paid app VS in-app purchases (IAPs)

aCalendar offers a complete package with all features and no ads as aCalendar+ or you can upgrade single features as IAP (in-app purchase).

All purchases are one-time payments (no subscriptions) and valid on all your devices with no time-restriction.

Currently, there are 5 single features, which combined are equivalent to aCalendar+ (Ad-free, Tasks, Business Features, Colors, Holidays).

aCalendar+ is usually only offered as a separate paid app, which has two advantages:

  • smaller APK size, as the libraries for IAPs and ads are not required) 
  • access to Google Play family library (for purchases after July 2, 2016)

Under certain circumstances (e.g., prior purchases of single features or sales), we also offer aCalendar+ as IAP. You can always purchase aCalendar+ as a paid app at Google Play

Upgrading to aCalendar+ as IAP gives you no access to the paid app aCalendar+.

Purchasing aCalendar+ as paid app, does not unlock features in the regular version. App settings are imported at first start of aCalendar+, then the free version can be uninstalled.

When reinstalling the app, please make sure to install the correct version (aCalendar+ if you purchased the paid app or aCalendar if you made IAPs).


If your prior purchase is not detected, make sure to use the same account as you used for purchasing the app. You can check all your purchases from a Google account in Google Pay or in Google Play Order History

Sometimes a new purchase takes some time before it is available on other devices. Resetting the storage of the Google Play app on the other device may speed this up

If you cannot solve the issue, please contact our support with details and the Google account used (or the Google Play order number).

Prior purchase at Amazon App Store

If you purchased at Amazon App Store before, you need to reinstall from Amazon App Store - you cannot transfer licenses between Amazon and Google.

We only offer aCalendar+ at Amazon App Store.

Huawei App Gallery

aCalendar and aCalendar+ are also available at Huawei App Gallery - you cannot transfer licenses between Huawei and Google.