An uninvasive, secure Android phone can look extremely fancy, thanks to the awesome Open Source Android dev community! Here are personal recommendations
LibreTorrent is a Free as in Freedom torrent client for Android 4 and later, based on libtorrent. Download and share files directly on your device.
This is a privacy oriented and deblobbed web browser based on 
Mozilla Firefox technology. It enables many features upstreamed by the 
Tor Uplift project using preferences from the arkenfox-user.js project.
Beautiful, minimal, and fast weather app that uses the OpenWeatherMap API. (Requires Android 6.0 or later)
OpenWeather
Geometric Weather is a light and powerful weather app that provides you with real-time temperature, air quality, 15-days weather forecast, and accurate time-sharing trends.
AccuWeather, Openweather
Comments
I won't call all of them beautiful but these are nice apps. I discover new once that look good so I'll update my list with them thanks ^^
Edit : Birday is better looking in my opinion as is also FOSS
[Edited by justarandom, September 08]