Mobile App
The Seconds Interval Timer app trains anywhere — on iPhone, Apple Watch, and Android. Voice cues, offline support, and the same workouts you know from the web.
4.7 on the App Store · 71,160 ratings
The Seconds Interval Timer app trains anywhere — on iPhone, Apple Watch, and Android. Voice cues, offline support, and the same workouts you know from the web.
HIIT, Tabata, EMOM, circuits, and anything you can dream up. Mix intervals, sets, and rounds without leaving the app.
Voice cues call your intervals out loud. Keep your eyes on the bar, the bag, or the gym floor.
Run your playlist alongside the timer. Cues duck the music; your playlist plays the rest of the time.
Run on iPhone, Apple Watch, or Android. Workouts you build on one device are ready on the others.
Send a timer to a friend in one tap. Color-code every interval so you know what is coming before the beep.
Big tap targets, screen-on lock, background playback. No account, no ads, no friction.
From phone to watch, every screen in Seconds is built for the moment you actually need it — mid-rep, mid-rest, eyes down, hands busy.
Build and run your intervals on iOS, with a dedicated layout that uses the full screen on iPad. Voice cues, background audio, and your own music all come along.
Seconds runs right on your wrist — leave the phone behind. Quick Intervals lets you build a basic circuit on the watch itself, and timers you edit on your phone sync over so you can run them without it nearby.
The same interval workouts on Google Play — free as Seconds, or one-time-paid as Seconds Pro. Looking for the Seconds Pro APK? You don’t need a sideload: get Seconds Pro safely from the Play Store.
Download Seconds for free and build anything — HIIT, Tabata, EMOM, circuits, custom sequences. Nothing is held back: voice cues, background audio, Apple Watch, timer sharing, and color-coded intervals are all there from the start.
The one limit: each timer locks after you run it once. A single in-app unlock removes the lock on every timer you make — no subscription, no per-timer fees. Prefer to skip that step? Seconds Pro is the same app, paid once up front, with nothing to unlock.
Searching for the best interval timer app? Skip the top-ten listicles and use an honest checklist instead. Judge any app — this one included — against what actually matters when you’re tired and sweating:
The best timers call your intervals out loud so you can train with your eyes off the screen — mid-rep, hands busy.
Cues and alerts should keep playing when the screen sleeps or you switch apps. A timer that stops when you look away is no use on the gym floor.
Look for sets, rounds, and intervals of different lengths in one timer — not just one work/rest pair repeated.
A native watch app lets you leave the phone behind. Bonus points if it runs intervals standalone, without the phone nearby.
You shouldn’t need a login or a signal to start a workout. The timer should just open and go.
Nothing should interrupt a set. Check that the free version is usable and the paid version is a clean, one-time unlock — not a subscription.
“I’ve gone through quite a few fitness apps in the past. The one I use more than everything though is Seconds Interval Timer.”Joe Wicks — The Body CoachRead the article
Infinitely customisable to make any workout you want / combination of different workouts. Eg I use a compound timer with a set warmup routine ‘circuit’ including spoken exercise names, which then flows into some tabata timers and then a simple set timer to finish. Ideal!DanReckons — Australia
Infinite options of adding workouts, run timers etc. whether HIIT, Tabata, interval running, a straight out timer, whatever. Easy to edit existing workout timers or add new ones. Can repeat an interval if you get interrupted. Never leave home without it.Ush_antia — Australia
As a personal trainer I’ve tried a number of apps and this one does it all. Easy to learn, times tabata, circuit and more. Love the half way alerts. The display is easy to see from a phone at a distance for small group training and even better with my iPad. Love it!Mary the Reader — United States
I like using the timer for stretching-to make sure I hold each stretch long enough. The interval timer works great for that. The "3-2-1" countdown is an added bonus. Also makes it easy to set up my own HIIT workout. I like that you have several options to customize the timers for different workouts.jwn717 — United States
I’ve used seconds pro for my high school teams in 3 different sports over the last 8 years. Keeps me on time and moving in the right direction. The voice over alerts kids when, where and what to transition to. I really don’t remember what I did without it.jennernest — United States
I’ve had SecondsPro for years now and I love how I can take a described workout (e.g., book, article, YouTube) and convert it into a talking coach pushing me through the reps. Works like a champ! I have sessions for flexibility, strength, aeorobic, and mixes. Keep it going!Iwannamango — United States
Seconds has been used aboard the International Space Station. How many interval timers can say that?
Browse Astronaut WorkoutsView on InstagramDownload the Seconds Interval Timer app for iPhone, Apple Watch, and Android — free as Seconds, or one-time-paid as Seconds Pro.