Seconds Interval Timer

What It Does

Seconds is a powerful interval timer app designed for HIIT, Tabata, EMOM, circuit training, and any workout built from timed intervals. Featured by Apple and used by fitness influencer Joe Wicks (The Body Coach), Seconds allows you to create custom workout timers that run on iPhone, iPad, and Apple Watch. The app calls out each interval by name, keeps running with the screen off, and integrates seamlessly with your own music and Apple Health.

Who It's For

Seconds is perfect for fitness enthusiasts, personal trainers, athletes, and anyone following structured interval-based workouts. Whether you're doing strength training, cardio, stretching, or even using the Pomodoro technique for studying, Seconds adapts to your needs with flexible timer configurations that range from simple to complex.

Key Features & Capabilities

• Flexible Timer Builder: Start from HIIT, Tabata, or circuit templates, or build custom timers from scratch with sets, rounds, and intervals of varying lengths
• Chain Timers: Link multiple timers together so warm-ups flow into main sets and cool-downs automatically
• Voice Cues & Audio: Intervals are called out by name with warnings before transitions; play your own music per timer or per interval with automatic audio ducking
• Apple Watch Support: Run timers independently on Apple Watch with sync from iPhone, plus Quick Intervals for building basic circuits on the watch itself
• Full-Screen Display: Color-coded intervals visible across the room in portrait or landscape mode; iPad utilizes the entire screen
• Background Operation: Timers continue running with the screen off or while using other apps
• Apple Health Integration: Save workouts and mindful sessions; estimate calories burned with heart rate monitor data
• Additional Tools: Built-in stopwatch with lap tracking and countdown timer with preset durations

Typical Workflows

Create a custom HIIT workout with exercise names, color-code each interval (choose from 10 colors), set up voice announcements with text-to-speech, and add your favorite playlist. During your workout, the app displays a clear full-screen timer, announces each move, and automatically manages your music volume. The lock button prevents accidental pauses, and everything syncs to your Apple Watch so your phone can stay in your locker.

What Differentiates It

Seconds stands out with its one-time purchase model (no subscription required), extensive customization options, and robust Apple Watch integration. The app is free to try with unlimited timer building—each timer locks after one use until you make a single in-app purchase to unlock everything forever. Users consistently praise the affordable one-time fee and the app's versatility for both simple and complex workout structures.