Here’s a memo on how to embed external fonts in iOS apps for iPhone/iPad.

Default Installed Fonts

Site to check fonts installed on iOS ・iOS Fonts

How to Embed External Fonts in iOS Apps

・iPhoneアプリへの外部フォントの埋め込み | Albatrus Blog

・ゆず屋: [フォント] iPhone & iPhoneアプリのフォント

That’s all from the Gemba.