Hourglass - Hourglass is the most advanced simple countdown timer for Windows.
WOD - A beautiful HIIT workout app for people on the go
Free Countdown Timer - Free Countdown Timer is a free, full-featured and user-friendly countdown timer for Windows
KetoFoodist - The Keto Food search engine
SnapTimer - SnapTimer is a simple, free, portable countdown timer for Windows.
HIIT (Watch) - A very simple interval timer engineered for Apple Watch