Hi there!
I'm Sr233/Sulti/Siarhei Saltanovich and I glad to see you in here! I hope, this app will help you to learn language faster!
Rules of txt file
This is an example how you can put your words in your txt file:

A first word is word from another language, a second word in your language.
Stars means how much time you have been answering correct.
How to play
You must write your word answer such as it in your txt file:

After that, if your answer is correct, you will receive:

Then congratulations!
But if your answer wrong it will show you an answer, and then set to zero your stars. It means you must repeat your word so much time as you need.
You must select how many stars do you need in there:

Then you must wait for a new word.
How can I save words?
You have 2 different buttons for saving:

"Save learned words" means you can save your learned words file.
"Save rest of words" means you can save your updated words file. You can see in the file updated words and new stars (if you answer is right)
This is a video of manual, how you can use an app:
Put your .txt file there: