Downloaded this about 8 years ago and love it. Being an app it has outlasted my physical version where the markings wore off the buttons and the some buttons stopped working because of thousands of key presses. Also I almost always have it even when I forget my physical calculator, I almost always have my phone.
Some people are complaining they didn’t get all the features, but I thing they just need to rotate the device to landscape where it switches modes to expose them all.
My one complaint is that since I had a recent iOS upgrade on my iPad now the digital display is above the window. Still works, just awkward, and annoying. Doesn’t happen on my iPhone just on the iPad.
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