1. It's not appropriate to charge without giving the user a peep on how the app functions.The payment is very cheap ... its not about the payment the method that you need to collect the money is not good .... because how can I pay you before you didn't even show the trial version ....First of all, your work is good, be strong, but don't try to copy some things from other people's mistakes and explore others.
2. And also you gotta put a notice on play store if your app contains adds or contains purchases.It is a good idea for an app but asking for payment without having given a demo or trial version is typically insane.
3. I personally want to know what i am paying for.A great app, but a trial version should be possible.
4. Additional app theme should be added.Too greedy! You have got to give the user a taste of what you got before asking for money.
5. That's why there's such a thing as Trial Version.
6. What is the meaning of Ethiopia, the country of black people? Fix it, the picture is not written as you get it from others.The app is one of the best.
7. Thank you.Even though it needs minor editing, some additional updates and graphical contents its worth its price.
8. It's a great app but as it is a pro version, it still have some features to be updated; 1.
9. You just locked the entire thing out unless the user pays.
10. What's the user paying for? We don't even know you got what we want.
11. But if it is possible, it will be much more useful if you guys can add the other parts of the book you used to develop the app.