I take my previous positive review back. Chegg tried to outsmart and screwed a good app with the sync option. Syncing cannot figure out when the latest changes where made and overwrites. This just wasted all the time I spent to correct mistakes; now everything is back to its erroneous state! Even if I try to make changes on the device I created the decks on, idiotic syncing changes it back. So basically you cannot make changes and be sure they are going to stay in the way you wanted. Great job, Chegg! What happened to the simple backup? If you cannot make something working correctly, then dont do it. At least with the backup option I was in control; I would be swearing to myself instead of Chegg now. Dont use this app, try another one. Unfortunately its going take a lot of time to recreate existing decks in another app. I hope that one doesnt screw up too. Be cautious if you try another app by this company.