I only got this app to write a review to tell you that your translations are wrong. Not in a mean way, just so you can better your apps. Buenas Dias would be おはよう(ございます), not 今日は (which, by the way, is konnichiwa [こんにちは], not こんちは or こにちわ or any other variant you created). Even as a first year Japanese student, I know that those are wrong. Please try to fix those things, so learners of Japanese may learn it properly. Thank you !