As of revision 30, you can store personal notes for each verb. Verbs containing personal notes would be marked by the N symbol right after them colored in green:
For your convenience and at your preference, you could switch to having the note displayed directly instead of only having the mark, by tapping Menu -> Options and then ticking the Show my notes mark:
Then on the browsing screens the note will be displayed at the bottom. If it is too long it will be cut to fit in the current screen size:
How to manage your notes
To manage a note, you need to open the desired verb. To create a new note tap on the note icon (circled in red in the image below):
A box will open asking you to enter your note. Type whatever you have in mind and click Save. The verb card will be updated showing your note:
Note is preceded by N symbol.
To edit the note just tap on the text of the note. If you wish to remove it, use the red cross button on the right.
Notes will be included in synchronization, which means you will have them on all of your devices.