@Sii, You say that you do not want a web browser, but do not make it clear why… I take it to mean you don’t want to have any way of navigating the web on your device at all?
But without a little more context for why these are the limitations you are imposing on the problem, the idea that anything is too “obvious” to need stating is difficult to square.
For what it’s worth, I use Vivaldi on my android devices and the “Add to Homescreen” feature which gives me a nice little application icon on my device which opens directly to my wiki as if it were an application (without a url box, etc)
I don’t know if this would work with a standalone, but I don’t see why not. I can say with certainty that it works with tiddlyhost.com as it’s the method I used before I started self-hosting.
However, this may not meet your requirements since it is technically a browser… though technically any solution you use would be acting as a browser, as already pointed out.