The app behaves exactly like 'PrivateText' but it is enriched to fulfill a goal completely different from the simple management of daily notes.
The app has been equipped with a completely hidden activity that allows the owner of the smartphone to detect and archive each physical movement of the device and each screen-on/screen-off event, by collecting the respective date-time of the events (motion is represented by start-moving and end-moving events), letting, indeed, the owner quantify the frequency and the duration of each period of time in which the smartphone is handled by anyone.
The app, beyond the possibility to explore all the logs archived, allows to rely on the exportation of the entire set of logs in a form of a unified log file, whether the needs to communicate with the authorities occurred.
The app, indeed, helps collecting the evidences of a possible unsolicited attention directed by some one to your smartphone.
YourFriend, just like PrivateText, presents the same enhancement to the (premium) level of use, in the form of an in-app purchase product, that allows the exportation as a unique text file of the whole content written by the user (all the daily notes).