AIDA64

Hardware and software information utility for Android based devices. Based on the extensive hardware knowledge of the AIDA64 for Windows application, AIDA64 for Android is capable of showing various diagnostic information for phones, tablets, smartwatches and TVs.

Sensors Multitool

Sensors Multitool: the ultimate tool for the sensors of your smartphone. Information about all sensors supported by your phone.Support for show information of WIFI networks and GPS.All data accompanied by graphics in real time.Collect on a single application: altimeter, metal detector, compass ...

Network Analyzer

Network Analyzer can help you diagnose various problems in your wifi network setup, Internet connectivity, and also detect various issues on remote servers thanks to the wide range of tools it provides.It is equipped with a high-performance wifi device discovery tool, including all the LAN device's addresses, manufacturers and names. Further, Network Analyzer contains standard net diagnostic tools such as ping, traceroute, port scanner, DNS lookup, and whois. Finally, it shows all neighbouring wi-fi networks together with additional details such as signal strength, encryption and router manufacturer to help discovering the best channel for a wireless router. Everything works with both IPv4 and IPv6.

Blokada

Blokada efficiently blocks ads, tracking and malware. It saves your data plan, makes your device faster and protects your privacy. It's free, open source and secure.

• Blokada.org
• F-droid.org-blokada

F-Droid

The F-Droid Repository is an easily-installable catalogue of free and open source apps for Android. With F-Droid, it's easy to browse and install apps on your device, and keep track of updates. You can also browse the repository with a web browser, and download the app directly from there, if you can’t or don’t want to run the F-Droid client on your device.

• F-droid.org 
• Alternativeto.net-F-droid