Simple Interval Timer

Content rating
Everyone
500+
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Content rating
Everyone
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About this app

⏱️ Simple Interval Timer – Perfect for Every Workout

The easiest way to time your workouts on your Android phone or Wear OS watch. Designed for athletes who want results, not complications.

💪 What It's For

HIIT training, CrossFit WODs, boxing rounds, Tabata workouts, circuit training, gym sessions, running intervals, and any sport requiring timed work/rest periods.

⚙️ Super Simple to Use

* Set your warmup time
* Choose work and rest durations
* Pick number of rounds
* Add cooldown period
* Press START and train

🧠 Smart Features

* 🎨 Color-coded phases (never lose track of where you are)
* 🔊 3-2-1 countdown beeps and a signal at every phase change
* 📳 Vibration cues too: choose sound, vibration or both
* 📱 Keeps timing with the screen off or while you use another app
* 🔔 Live countdown in the notification
* ⌚ Wear OS: always-on display, rotating crown support
* 👀 Large, clear timer display
* 🛠️ Customizable for any workout style
* ✈️ Works offline, no account needed
* 🚫 No ads, no distractions

The app adapts to your device language and is available in multiple languages. Translations are provided via Google Play to make the app accessible worldwide.

(If you want to help fix errors in translation, please write to info@celest-watches.com)

❤️ Why Athletes Love It

Clean interface. No learning curve. Just open, set, and go. Perfect for when you need to focus on training, not your timer.

⭐ Get fit. Stay simple. Install now.
Simple interval timer for HIIT, CrossFit, boxing and all workout routines.
Updated on
Oct 25, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • No data collected
    Learn more about how developers declare collection

What’s new

Keeps timing with the screen off or another app open
Live countdown in the notification, plus a paused state
Vibrations now work even with touch feedback turned off
Back no longer ends a workout
3-second phases get the 3-2-1 countdown
Better with large fonts, on tablets and in landscape
Screen stays on only during a workout
Themed icon support
Fixed a crash on Android 7