Solo
For training on your own.
- Work, rest and rounds routines
- 3·2·1 and a sound at every phase change
- History and widget with Pro
- No ads, no account
INTERVAL TIMER
One timer forthe whole class.
On the coach's phone, on every student's phone and on the gym TV, to the same second. Or just on yours, if you train alone.
I have a room code →ONE APP, TWO MODES
Groups
For coaches, boxes and gyms.
- The whole class on the same second: phones, browser and TV
- Students join with a code: no app, no account, nothing to pay
- The gym TV becomes your wall clock and whiteboard
- Tabata, EMOM, AMRAP and station circuits, run from your phone
HOW IT WORKS
From routine to class in a minute
Solo
- 1
Build the routine
Warm-up, work, rest, rounds and long rest. Or start from the routines the app comes with.
- 2
Tap Start
Each phase's colour, the 3·2·1 and a sound at every change guide you without looking at the screen.
- 3
See your progress
Every session is saved on your phone: minutes this week, streak and history.
With a group- 1
Build a session from blocks
Tabata, EMOM, AMRAP, station circuits, ladders, warm-up and rests. Or start from a template.
- 2
Open a room
A 6-digit code and a QR. Temporary for one class, or fixed for every week.
- 3
Students join
From the app or the browser, with just the code and their name. No account, nothing to pay.
- 4
Run the class
Start, pause, skip, +15 s or repeat from your phone. Everyone sees it on the same second, the TV too.
FOR GROUPS
The whole class, one timer
From the coach's phone to the gym TV and every student's phone, to the same second. No wall clock, no whiteboard, and nothing for students to install.
Block builder
Each block with its colour and length. The bar on top is the whole class.
Waiting room
The code in big type, the QR and students arriving live. Tap a name to remove them.
Controller
Big buttons for a sweaty hand. Stopping everything takes a 1-second hold.
Student, live
The same second as the coach, on a phone or in a browser. If the connection drops, it keeps going.
Tablet per station
Each circuit station shows which group is there now and which one is coming.
The gym's TV
Readable from 10 metres. No text, blackout or a flash at each change, as you like.
FOR BOXES AND GYMS
The TV you already own becomes your clock and whiteboard
Skip the €300–800 wall clock. With the Studio plan, every coach at your gym gets Groups in one payment: 24,99 €/month with 3 coaches, and your logo on the TV.
Try it free for 30 days →AND ALSO
Up to 30 per room
24-hour temporary rooms or fixed ones, with a name.
Stations and groups
Up to 4 colour groups rotating around the circuit.
Class sounds
Whistle, horn or boxing bell. Plays on the coach's phone and the TV.
If the network drops
The timer never stops; it resyncs when it's back.
Templates
Yours and HIIT Timer's. Save a class with the adjustments you made.
PRICING
Pay only for what you use
To train on your own, a single payment. To run classes, Groups. Students never pay.
SOLO
Free
To get started
0 €
- 3 routines
- Full timer with sounds and 3·2·1
- Join any room as a student
Pro
To train on your own
4,99 €one-time
- Unlimited routines
- History
- Home screen widget
- Yours forever, no subscription
GROUPSFOR CLASSES
Groups
For coaches and gyms
5 €/month
Billed 59,99 € a year, with 14 days free. Or 7,99 € a month, or 149,99 € once, forever.
- Everything in Pro
- Live rooms, up to 30 per room
- Block builder and templates
- TV and station tablets
- Coach account with photo and name
Studio
For boxes and gyms
24,99 €/month
or 249 €/year · 30-day trial, no card
- The TV you already own, instead of a €300–800 clock
- 3 coaches included
- +6 €/month for each extra coach
- Everything in Groups: rooms, blocks, stations and TV
- Fixed rooms, logo and templates owned by the gym
- A panel to invite coaches
Prices include VAT in the euro area; elsewhere, the App Store or Google Play price applies. Groups renews automatically; cancel any time from the store.
IF YOU TRAIN ALONE
SCREENS
Made to be read mid-sweat
Big digits, one colour per phase and nothing to distract you. This is the app when you train on your own.
APPLE WATCH · WEAR OS
The timer, on your wrist
The workout running on your phone, on your watch. A glance at your wrist tells you the phase, the seconds and the round, with your phone still in your pocket.
All at a glance
Phase, big countdown, round X/Y, exercise and the progress bar under the time, in the app's colours.
Buzzes on cue
At every phase change, on the last 3 seconds and at the end. In rooms, the 3·2·1 too.
Control from your wrist
Pause, resume and skip. When training on your own or as the room's coach.
Following the class
As a room member, your watch follows the coach's timer. Just watch, no buttons.
APPLE HEALTH · HEALTH CONNECT
Your workouts, in Health
Turn it on and every workout over 1 minute is saved to Apple Health or Health Connect, with its work and rest segments when there were no pauses. Live room workouts too.
- Optional: turn it on in Settings
- Workouts over 1 minute
- Work and rest segments
- Live classes too
Write only. Reads nothing.
HIIT Timer reads no health data at all: no weight, no steps, no heart rate. It only adds your workouts.
FAQ
Frequently asked questions
COACHES AND GYMS
Do students need the app or to pay?
No. They join with the code from the browser (hiittimer.io) or the app, with just a name. No account, nothing to pay.
How many people fit in a room?
Up to 30 participants at a time. Temporary rooms last 24 hours; fixed ones stay until you delete them. If you need more, talk to us: we make custom plans for studios.
Do I need internet?
To join the room and get the start, yes. Once it's running, if someone loses the connection their timer keeps going and catches up with the class when it's back.
How do I put the room on the TV?
Open hiittimer.io/tv in the TV's browser (smart TV, Chromecast or a computer over HDMI). It shows a code and a QR: type it or scan it from the app. No cables, nothing to install.
Where does the sound come from in class?
From the coach's phone and the TV, with the sound you pick (whistle, horn, boxing bell). Students' phones only vibrate, so it doesn't get noisy.
Can I try Groups before paying?
Yes, the yearly plan comes with 14 days free. Cancel before it ends and you pay nothing.
Can I do Tabata, EMOM or AMRAP?
Yes. Group mode builds sessions from Tabata, EMOM, AMRAP (counting up or into negative), station circuits, ladders, warm-up and rest blocks.
THE APP, THE WATCH AND YOUR DATA
Is Pro a subscription?
No. Pro is a one-time payment of 4,99 € and it's yours forever. Only Groups, for running classes, is a monthly or yearly subscription (or lifetime with a single payment).
Does it work on iPhone and Android?
Yes, both. And students can follow the class from any browser.
What do you do with my data?
Your workouts are stored on your phone. In rooms only the name you type is shared; the coach has an account (Apple, Google or email) to keep rooms and the Groups plan.
Do I need my phone to use the watch?
Yes. The watch shows the workout running on your phone. If the connection drops midway, it keeps counting accurately.
Which watches does it work with?
Apple Watch (with an iPhone) and Wear OS watches (with Android). Training on your own or as a coach you can pause and skip from your wrist; as a room member, the watch follows the class.
What is saved to Apple Health or Health Connect?
Only workouts over 1 minute, with their length and work and rest segments when there were no pauses. It's optional (Settings) and HIIT Timer reads no health data.
DOWNLOAD
Start for free
Free on iPhone and Android. Students can also follow classes from the browser, nothing to install.
I have a room code: join from the browser →CONTACT
Shall we try it at your gym?
Are you a coach or run a gym and want to try it with your group? Have a question, an idea or found a bug? Write to us and we'll get back to you.
Book a democentral@brothapps.com