App Store

App	Open Source	Source Code
F-Droid	Yes

Date/Time

App	Open Source	Source Code
Chibe	Yes	Source Code

Development

App	Open Source	Source Code
FastHub	Yes	Source Code
MGit	Yes	Source Code

Email

App	Open Source	Source Code
K-9 Mail	Yes	Source Code
K9 Material	Yes	Source Code

Finance

App	Open Source	Source Code
My Expenses	Yes	Source Code

Messaging

App	Open Source	Source Code
ChatSecure	Yes	Source Code
Serval Mesh	Yes	Source Code
Signal	Yes	Source Code
Silence	Yes	Source Code
Wire	Yes	Source Code

Multimedia

App	Open Source	Source Code
AntennaPod	Yes	Source Code
	No
LibriVox Audio Books Free	No
Timber	Yes	Source Code

Networking

App	Open Source	Source Code
I2P	Yes	Source Code
LibreTorrent	Yes	Source Code
Orbot	Yes	Source Code
WLANScanner	Yes	Source Code

Productivity

App	Open Source	Source Code
Markor	Yes	Source Code
Simpletask Cloudless	Yes	Source Code
Wunderlist	No

Protect Your Eyes

App	Open Source	Source Code
f.lux	No
Red Moon	Yes	Source Code
Simply Solid	Yes	Source Code

Reference

App	Open Source	Source Code
Survival Manual	Yes	Source Code

Security

App	Open Source	Source Code
Google Authenticator	Yes	Source Code
OpenKeychain	Yes	Source Code
ProtonVPN	Pending

Social Media

App	Open Source	Source Code
dandelion*	Yes	Source Code
Tusky	Yes	Source Code