Proofread & edit text for spelling, grammar, vocabulary, syntax and punctuation

Num. of words: 1428
Topic: Mobile App Description
Tone: Formal/Professional
Extensive research needed: no
Extra notes: Hi,
The file is attached. It is a description and content of an android app that is to be published shortly.
I think it is almost perfect!
Just want a pair of expert eyes to have a look at it and improve before it is published on play store.
I specifically need suggestion on making 8 titles (for example; 1. How much you are using your mobile phone?) and their descriptions uniform. I mean that all these 8 points and descriptions sound harmonious. I will also appreciate if these sections, including title can be shortened without affecting the meaning.
Need it in next 15 hours.
Please apply only if you can provide the highest quality service within this timeline.

Best Regards,
Savitri