A quick Google lead to the below instructions. Give it a try.
Thank you but tried 10 times, doesn't work, also only weather app doesn't work, others are fine.
Check your calculator app as we'll I had this same problem and the only way I got it fixed was to update to 7.1.1 when I got a new iPhone
Updated to 7.1.1, no more crashes
Now just avoid installing appcake and having this issue on the new OS and jailbreak lol.