I'd like to use this app and looks fine.

Concerns are:

1. Is this app still open source ?
2. How to verify any backdoor / sending my data to a remote location.

I think the app is good and gonna purchase it, but I need to confirm the above.

Thanks,

Learning vocabulary.

Old or new puzzles are ok. Needs solutions in the app.

Some people require too much time for even simple tasks.Its not because they are lazy, but they just enjoy it like masturbation. The more time taken to finish, the more pleasure.