For your UI or app select a typeface with clean distinctive characters (Il1 test), open shapes, little contrast, and set it legible (no caps), so it works in tiny sizes.
How to pick a Typeface for User Interface and App Design?
![](https://vakgroep.cmd.hr.nl/algemeen/inspiratie/wp-content/uploads/helvetica-vs-lucida-grand-mac-os-10-10-yosemite.gif)
For your UI or app select a typeface with clean distinctive characters (Il1 test), open shapes, little contrast, and set it legible (no caps), so it works in tiny sizes.