9 – #FortnightlyFOSS
#FireFox #Android

Browser that supports extensions.

8 – #FortnightlyFOSS
#TikTok

Privacy-oriented, free and open-source social media platform.

7 – #FortnightlyFOSS
#InfinityForReddit

#FOSS #Reddit client for #Android.

Multiple accounts, follow sub-Reddits without an account, custom themes, and more!

6 – #FortnightlyFOSS
#Showly

#FOSS (freemium) #TV show tracker that syncs with #Trakt

The paid features are not necessary: light theme (and system theme), news section, and the ability to change the main poster to another poster are all the paid features.

5 – #FortnightlyFOSS
#urlChecker

#FOSS and #lightweight app that gives you a pop-up to preview links before opening them. Clean a link's tracking parameters and scan it for viruses.

4 – #FortnightlyFOSS
#ReadYou

#FOSS #RSS feed reader.

3 – #FortnightlyFOSS
#StreetComplete

#FOSS #OpenStreetMap contributing Android app that gamifies contributing to OSM.

2 – #FortnightlyFOSS
#FluffyChat

#FOSS #Matrix client, similar to #Element. Available on most platforms. Has a pretty UI.

1 – #FortnightlyFOSS
#ViMusic
YouTube #Music client that caches what you listen to for offline relistening.

[I'll try to recommend a #FOSS Android app once every 2 weeks]