I made a library that, when a log function is called, logs an entry in a list. If you want to view previous entries, simply tap the yellow button in the corner and your entries become visible.
You can use it in a number of ways. The way I use it is this:
The main function inside of the library is called logEvent. When you do that, you change the default print function to log. Then, every time you use the print function, you are using the log function instead. Logging an entry is as simple as printing.