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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…
Yeah, I paid for PCalc because someone put in effort to make it, and it’s good. Don’t feel bad about that.
But I wouldn’t subscribe to one.
Yeah the subscription is mind boggling.
I like that model. You get to try the software for free and have a way to thank the developer and get something extra, rather than just a pure donation.
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.
Both of those are very different use cases from what I have, though.