The best and most secure way to get and app is through the developer’s website. Many developers offers direct download or purchase (in case of commercial apps) of their apps. An example of commercial apps you can buy out of the play store is the very good aqua mail, or sygic navigation.
Moreover in this way you give 100% of your support to the developer and are not forced to pay the obscene 30% google tax.
I would never ever trust any online apk downloader which may temper legit apps including malware and the likes. If you want to go that way, use a pc installed apk downloader like GooglePlayDownloader for linux (which is an open source application and therefore you can trust it’s not doing anything evil).
Lastly, as may already said, F-Droid is an excellent source of free and legit apps.
Remember that going away from Google gave you may advantages, but weakened a bit your mobile phone security. If you know what you’re doing there’ll be no problems, but you must be a bit more careful about what to install and trust.
Google is useful, important to our life. On the other hand, we should think about risks if Google services are down. (Google services go down; Internet panics) Also we should think about privacy.(How to live without Google).
Amazon are, if anything, even worse than Google, who are at least honest about being evil! But by far the worst company I’ve come across was Apple. They may have cleaned their act up by now but in the early days of Itunes their T&Cs terrified the life out of me and I haven’t touched any Apple programs since. I’m not even certain if this is applicable here. Is Itunes available on Android?
I’m trying to set up DavDroid on my father’s FP1. F-Droid won’t let me install. I guess it is the Android version. Can I install an older version? Where would I get that?
Ist there another open app to sync with iCloud?