You could use Termux-DeepSpeech and configure Android to use that instead of the "OK Google" voice assistant. It's offline and open source since it's based on Mozilla's DeepSpeech.
Do note however, that you have to define the voice commands yourself. For example:
WORDS="$(speech2text)" # This will listen to the microphone for (by ...
Looking at https://www.guidingtech.com/k9-mail-app-alternatives-android/ I find the curiously named Tutanota.
Weird name but awesome email client and one of the few names in the market that can give ProtonMail a run for its money. Another open-source email client with a presence on both Android and iOS, Tutanota also uses end-to-end encryption but misses ...
I use Automate to do something very similar - change a setting on the phone when arriving at a location.
This app, which is free to use, essentially provides a scripting language whereby you can set triggers and actions. The language also supports looping and branching so that you can do more than simple if a then b commands.
The app uses less power than ...
Llama and Tasker, described at your second link, could certainly accomplish this.
A slightly easier method for a newbie would be to use IFTTT. Something like this applet -- "If you enter an area, play music."
To create your own applet, go here after signing up and installing the app on your device.
I would highly recommend Draw.io, it's a web-based application and you can sync to Dropbox, OneDrive, or export projects and save them anywhere.
It has templates to get you started or to use as examples and is great for mind-mapping, flowcharts, UML diagrams, etc.
You can export them as HTML, PDF, XML, PNG, JPG, and a few more formats.
Well, FastHub does. FastHub was created in 2017. The idea of a FastHub creator is due to the fact that most of the few GitHub client apps are either don't have many features, look good, or buggy.
The development is also active by creators and contributors from time to time make FastHub better. Now FastHub almost has many features as on the GitHub website.