Laggy
I used to love this app and use it all the time on my iPhone 6. For some inexplicable reason it has become super laggy to the point of being very frustrating and unusable. I tried deleting and reinstalling it which helped for awhile, but it soon began lagging again. It still works fine on my iPad Mini though. Seems like perhaps its due for a maintenance update of some sort.
jeffitz about
Calcbot 2, v2.1.2