MiniTimer for iOS, by Ninebuzz - Super-Fast, One-Tap Timer Apps. Get One Free.

Fastest Alarm Setup App — One-Tap Alarm Clock for Daily Use

Stagetimer.io Explained in 2 Minutes | Free Online Countdown Timer

Create a countdown timer to share and/or display with others quickly and easily.

Create a Countdown Timer App || MIT App Inventor || Clock/Timer Component

Creating A Countdown Clock

Countdown Timer App in MIT App inventor | countdown timer| MIT App inventor tutorial

HopHopClock - beautiful and simple countdown timer for families