Athena VS mollyim-android

This setup can be used to create a 'push button' assistant (which is in fact what I am in the process of setting it up for) where you quickly record your command, and once finished it runs through the whole processing pipeline. I will be releasing more python/java scripts to do just this, and eventually turning it into a native Android app once I've formalized some of the design. I figured it was something people in this sub might be interested in. You can get the APK, the sample launching script, and the setup instructions on my Github. If you're interested in following the project you can do so at r/SapphireFramework

This project is still in early but you could like it https://github.com/Tadashi-Hikari/Athena

Google Assistant: Dicio is already on F-Droid but it won't get what you are saying. Possible actions are limited. There's also Athena that's in development, though it is not ready for any kind of use. Depending on whether you need some sort of an accessibility service, you can get away with ditching Ok Google / Alexa / Cortana / Bixby. TalkBack should help with it too.

Along with what you said, the Athena project also seem like interesting - even though you have to build it. Yet this video indicates that the developer knows what he is doing

Athena - intends to completely replace Google assistant,

Athena and the Sapphire framework

You may be able to install something like https://github.com/mollyim/mollyim-android in the EU ... eventually.

Haven't used Signal FOSS, but as it happens Molly bas just implemented OSM support, perhaps when it lands you might have better luck with it. Anyway, is there no issue tracker for that fork? I tried looking in their repo and found it disabled

Signal, Molly, Session

The shared preferences path remains the same, but signal is plaintext vs Molly which is encrypted https://github.com/mollyim/mollyim-android/wiki/Data-Encryption-At-Rest