The paid version of SafeInCloud app for Android (it has a Pro badge on it's icon) has a complete functionality (see Pro features) right away. You purchase this version once and can install it on any number of your Android devices. Here is a link to the paid version:
Free version with the in-app purchase
The free version of SafeInCloud app for Android has a complete functionality for first two weeks. Then you should make an in-app purchase to keep using the Pro features. After that purchase there are no differences between this version and the paid version. However, if you purchased the Pro features from inside the free app, then you cannot install the paid version (for Google Play Store these are two different apps). You should always install the free version on your Android devices and the Pro features will be enabled automatically:
The upgrade of the free version is not sharable with your family. You can do that only with the paid version.