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Your app made my day.
I'm learning as I go and the 3 factors that are crucial to my ease of learning fast are: simplicity, clear instructions and intuitiveness. I am impressed.
It took me less than 5 minutes to completely set it up and test it.
Interestingly, I tried using 3 other apps before I got to yours. I had to abandon them quickly to shorten the learning process.
Thank you.