Not reliable

We use the app often because we would like to enjoy the buy 5 get 1 free for the coffee and frappe offer except every time we get to 4 or 5 the app resets and we NEVER seem to get one free. Very disappointing considering that is the offer. Seems like a big scam considering it is not just my phone and my wifes phone that it happens to our families have had the same issues. App needs a lot of work.

Abbie pucker puss about McDonald's, v5.5.0