You can get this ALL FREE APPS from https://f-droid.org/

Offline Calendar Screenshot_2015-06-16-18-01-05 Offline Calendar Screenshot_2015-06-16-18-03-02 Offline Calendar Screenshot_2015-06-16-18-03-06 Offline Calendar Screenshot_2015-06-16-18-04-00

https://sufficientlysecure.org/index.php/android-apps/

 

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