If you are using iPhone 6 Plus / iPhone 6, there is a bug in the latest version of RainbowNote (v.2.9.10) that causes crash when showing a calendar. We have registered the fix version for it and it is waiting for Apple’s review. We are sorry for the inconvenience.
How to avoid the problem on current version
If RainbowNote always crash on launch because of the problem, please set “Reset Last View State” switch on and relaunch. How to do is below.
【Online Help: When you fails to launch RainbowNote】
If you usually use calendar view, you should change the sort order of the note list from updated (list view default) to created (calendar view default). How to do is below.
【Online Help: Sort your notes】