Product used : [together group TT] THESuperpower font
01. Download [iFont] at the App Store.
02. Go to the location where the font file is saved.
Mostly, it’s in the [Downloads] folder in the ‘Files’ app. (OTF⎜TTF)
If the file is zipped, unzip the file by clicking it.
03. Click the file hard → [Share] → [iFont]
04. Check the font. → [Install]
05. Open [Settings] → [General] → [VPN and Device Management] → click the font.
06. [Install] → Enter the password. → [Install]
07. Use the font in the apps.
Fonts can be used in the apps like Goodnotes, Keynotes, and Procreate!