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Where to get ProtonMail
(lemmy.zip)
F-Droid is an installable catalogue of FOSS (Free and Open Source Software) applications for the Android platform. The client makes it easy to browse, install, and keep track of updates on your device.
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Just a heads up, if you have a modern smart phone, Fdroid Basic is the latest and greatest official F-Droid app. The non-basic one is for older devices, now. It has to do with internally being able to use Android's newest targetsdk version.
From what I understand, that is not totally true. Basic does target the newer Android versions, but from what I understand, they are bringing the main client up to date as well. I'm using the main client at the moment, and it used to target 25, and now it's targeting 29. It's obviously still not the newest, but it has increased quite a bit, and I think it will continue to do so.