Great App.
When you have lots of calculations, being able to go back and check your work is super important. This application makes that possible. Thanks.
Purchased now have to pay again
I have been using this app for a long time. Why do I have to repurchase it. It seems going to iOS 15 it’s gone.
False advertising—Only lets you use free version for a short time...
...before it stops working unless you upgrade to paid version.
