Comment by HexDecOctBin

Back when I was on Android, there used to be a launcher by Nokia called Z Launcher. The idea was simple: the home screen could only show the six apps. However, you could draw a letter on the home screen with your finger, and it would be recognised and used as a beginning of the search query for app names. Of course, you would only get six search results, but you could always draw the next character to get better results.

And there was some basic ML to learn which app was more likely to be used at which time, location, etc. so that the right app could be shown at the right time without having to scribble anything. It was the most efficient way to launch apps I have ever used.

According to Wikipedia [1], it got removed in 2018 which is right before I switched to iOS. I do remember trying to replace it with KISS Launcher[2], but it just wasn't the same.

[1] https://en.wikipedia.org/wiki/Z_Launcher

[2] https://kisslauncher.com/