100% save data corruption
Normally I dont write negative reviews based on performance issues. As a game developer myself, i know how many different devices and OS setups are out there are and how many fringe cases can happen. A lot of times a 1-star review can be written based on an unreproducible crash which can be frustrating for developers.
However out of the hundreds of apps Ive played, this game has the most egregious fully reproducible bug Ive ever seen in a paid app, and I think its objectively unacceptable. A game in progress cannot be saved twice. If you close the app and return to your game once (whether because you didnt have time to keep playing or due to one of the many many crashes in the game), you can return to your game state with no problem. However if you do this a second time, your save data will be corrupted and deleted 100% OF THE TIME. No matter what, you can never quit and return to an in-game progress twice. For a game that is relatively long and full of crashes (where you have to quit and restart) this completely breaks the game and sadly, no one should buy it. My setup is iPhone 6 and iOS 10. It *could* be a new issue with iOS 10 (I didnt play the game on earlier versions), but based on this issue I believe it would be a 100% consistent bug on all configurations. PLEASE FIX THIS BUG. Even if you dont feel you owe it to your customers, you owe it to the Catan brand. If this is not in fact 100% reprodcible on all iOS configurations, I would modify the review. It deserves the 1-star only if this bug is as widespread and blatant as I think it is. I dont even mind the crashes. But the loss of your save data makes it completely unplayable even for the most devoted fan.
LORD WALDER FREY about
Rivals for Catan, v1.3.0