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[–] 102 points 2 years ago (3 children)

I have mixed feelings here. I legitimately paid ($1, once, a decade ago) for a calculator app and feel it was a great value (I still prefer it to this day). But then again the free version was fine too and the one-time payment was essentially a donation to the developer for a great app that unlocked... Themes...

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  • [–] 9 points 2 years ago* (1 child)

    F-Droid has an Android port of the Unix maxima, which is a whole free and open-source computer algebra system, that handles all my heavier lifting. And I'm pretty sure that every phone that I've ever seen ships with at a software package that can act as a five-function calculator, if someone is just looking for something simple.

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