On a basic level, the marginal benefit of this calculator over the standard Apple calculator is more than $0. So you can’t complain on the price. Don’t need to buy new colors if you don’t want to.
Issue 1: When you open the app, it keeps your last set of calculations up and running. So if you are starting a new calculation, the first step you have to do is clear the line. An extra step. Annoying. I can see how that would be nice if you wanted to continue your operation, but that’s hardly ever the case for me, and I found my self getting frustrated by this action based on my use. To make it worse, the last operation remains when I force close the program (swiping the app up after double-clicking the home button). That’s really annoying. Every calculator I’ve used has reset to 0 when turning it on. Yes, I can adapt, but I don’t use it that much for me to really think about it. Beyond that, the true genius of design is build something that “just works." (Note: there is a history page, so you could swipe over, select the last transaction, and keep going if you needed. They just assume (wrongly for me) that I want to continue more often than not.) So 3.5 stars for the annoyance factor.
Still, I used it more often than not because of the operational features. Until…
Issue 2: I got curious why it wants access to cellular data. I shut off access as part of a larger privacy cleansing, and now when I open the app, I get an annoying pop-up that says “Cellular Data i Turned Off for “Numerical” / You can turn on cellular data for this app in Settings.” What?
Why. On. Earth. Does my calculator need cellular access? Why does it pester me about it? It seems to work just fine with it off. Well, except for that annoying pop-up which has me a) very curious as to what’s going on behind the scenes and b) deleting the app from my phone.
cactakla about Numerical²