Android
Threema applies the system-wide font size settings (“Settings > Display > Display size and text > Font size”). If desired, it can also be adjusted directly in the Threema app: tap on the three vertical dots in the top right, select “Settings > Appearance > Font size,” and choose the desired option.
iOS
Threema applies the system-wide font size settings. Under iOS, they can be adjusted under “Settings > Display & Brightness > Text Size.” If desired, the font size can also be configured per app (as described in
this support entry).
