I have the Kagi android app, but I don't use it for searching, I use my browser for that and I set Kagi as my default search engine there. Instead, the feature I want from the app 9 times out of 10 is the Assistant.
It would be very useful if the app could be made to open directly to the Assistant mode as a default. This seems small but honestly it's pretty important as I use my assistant app regularly, and most of them open straight to a dialogue prompt, no switching contexts required, so from a UX perspective you get used to it being frictionless.
As for implementation, it would just need an option under the general settings for selecting the default mode to be in when the app starts.
There would be a dropdown menu in the general settings, listing all the modes Kagi can be in; Search, Assistant, Translate, Summarize, etc. The user selects one, or Search is the default otherwise, and Kagi opens in the selected mode when started.