This is really interesting well I'm not a big fan of apple so I'm using an android and i bet so many people here using that operating system too, i guess it's gonna be awesome if you make this available on the Android version, not only ios. Love this idea when people can earn token by being active in the app, hoping that the minimum withdrawal is low. On the other hand if you want to make this project successful you might give some airdrop like you've mentioned in the op and promotion on the internet, just my thought.
Thank you very much for your feedback! An Android version of the app is by far the most popular request at the moment, the good news is it's currently under development!

It should be available in about a month from now!
The withdrawal token amount is currently set to 250 tokens, which represents about a week of being active a few times a day. I am planning to distribute up to 100 tokens to each airdrop participant when it is launched.
Any suggestion about internet promotion is welcomed, I've got a few clues but everyone's ideas are always surprising and helpful!
A few days ago I just got some tokens in my eth wallet... didnt know what it is... googled it a little bit and found their telegramm group... quite a nice way of promotion... just send people who dont have dozens of different tokens a few and then I bet they will find their way to you... just my 2 satoshi.