HIIT Timer - Simple Timer

An interval timer app, perfect for HIIT training, with a large timer display and simple controls to help you stay focused.

A simple timer app, perfect for HIIT training

With an ultra-large full-screen timer display, you can instantly see your remaining time even in the middle of your workout. No complicated features—just the essential functions you need to keep your training smooth and focused.

Main Features • Large, easy-to-read full-screen timer display • Automatic alternation between work and rest intervals • 3-second countdown before each start so you’re ready • Clear color coding: blue for work, orange for rest • Simple controls for pause, resume, and skip • Banner ads displayed on the home and timer screens

Customization Options • Work time: freely set from 1 second to 15 minutes • Rest time: freely set from 1 second to 15 minutes • Sets: up to 99 sets supported • Dark mode & light mode • Available in both Japanese and English

Training Records • Automatically saves completed sessions to history • Check up to your last 100 records • Stay motivated with visible training progress

Designed for Usability • Runs in the background without interruption • Accurate timekeeping even with screen lock • Full accessibility support • User-friendly design to prevent misoperation

Recommended for everyone—from beginners to advanced athletes—who wants to start HIIT training. No complex setup required. Download now and start your workout today!

Privacy First All data is stored locally on your device and never shared externally.