Simple Design Ltd.

Simple Design Ltd. is the developer behind two Android apps covered here: a period-tracking calendar and a font and keyboard customizer.

Period Calendar Period Tracker sits in the calendar apps category and was last updated on October 16, 2026.

Fonts Keyboard Themes & Emoji is filed under font apps, and its latest update is dated October 10, 2026.

More about the developer is on its website at https://simpledesign.ltd/.