Some issue with review Assignment#2 (Help: review it again pls)

Hi!
Could you help me by peer reviewing my assignment on Coursera?

My name is: Gregory Kolosov

The subject of the assignment is: Unit Conversion App

Here is a link to the review: https://www.coursera.org/learn/objective-c/peer/I943h/peer-review-assignment-2-unit-conversion-app/review/eC6Ef5l0EeeuPhL2ByDlUA

Thanks!