Interval timer apps for deaf and hard of hearing gym-goers

The timer beeps, everyone else stops, and you're still going. If you're deaf or hard of hearing, you need a timer you can see and feel: the whole screen changes colour at every switch, the numbers are big, and something buzzes, ideally on your wrist or in your pocket. Most timers are built around a sound you can't rely on, so test any app with the sound off first.

In short

Look for three things: a big, colour-changing screen, a strong vibration, and a way to feel the change on your body.

An Apple Watch is the most reliable way to feel each change, because it's on your wrist, not on the floor.

Several timers do this well already, some for free. Test any app with the sound off before you trust it in a session.

1. Why don't normal interval timers work for me?

Because most of them assume you'll hear the beep.

Many timers are designed around sound: a beep for "go", a different beep for "rest", a voice counting down. On screen, there's often a small number in the middle of a plain background.

That doesn't work if:

you're deaf or have significant hearing loss
you take your hearing aids or processors out when you sweat
the gym music is louder than the timer
you've got headphones in for something else

You end up staring at the phone, or guessing.

2. What should a deaf-friendly interval timer do?

Look for these features. You won't always get all of them.

Full-screen colour. The whole screen should change colour between work and rest, so you can tell at a glance from across the room. A small coloured dot isn't enough.
Big numbers. The countdown should be readable from a few metres away.
Strong vibration. A buzz at each change, ideally different for work, rest and finish.
A countdown warning. A visual or vibration cue in the last few seconds, so the change doesn't catch you out.
Watch support. A watch puts the vibration on your wrist.
Works with the sound off. Everything important should still happen with your phone on silent.

3. Will I feel my phone vibrate during a workout?

Often, no. This is the part most reviews skip.

A phone vibration is only useful if the phone is touching you. On a bench, a mat or the floor, you're unlikely to feel it mid-burpee. In a pocket or an armband, you probably will, but not every exercise suits a phone in your pocket.

So for most workouts, think of the phone as a visual timer: big colour, big numbers, propped where you can see it. For a timer you can feel, you'll want a watch.

4. Can an Apple Watch tap my wrist for intervals?

An Apple Watch uses haptics, which Apple describes as the taps and vibrations it uses for notifications, alerts and interactions. You can make those taps stronger:

On your watch, open Settings.
Tap Sounds & Haptics.
Under Haptics, choose Prominent.

You can also change this in the Apple Watch app on your iPhone, under My Watch > Sounds & Haptics.

The built-in Workout app can run a custom workout made of timed work and recovery intervals. Apple says custom workouts are available in all workout types except Multisport and Open Water Swim. To create one, open Workout, tap the Goals button for a workout type, then tap Custom and Add.

Apple's guide doesn't spell out how the watch signals each interval change, so try a short custom workout at home before relying on it in a class. Some timer apps also run on the watch.

5. Does the iPhone camera flash help?

Not much, for timers.

iPhone has a setting called LED Flash for Alerts (Settings > Accessibility > Audio/Visual). It flashes the camera light for notifications. But Apple says it only works when your device is locked, and most timers keep the screen on.

It's still worth turning on for everyday notifications. Just don't count on it during a workout.

6. Which interval timer apps work without sound?

Here's an honest comparison. We've included our own app, and we've tried to be fair to the others.

App	Cost	Screen	Vibration	Watch	Worth knowing
Seconds Interval Timer (Runloop)	Free, paid upgrade	Full-screen, colour-coded	Yes, different at end of timers	Yes, runs on the watch by itself	Mature and flexible. Lots of options to learn
Interval timer - Workout Timer (Neo Pixel Labs)	Free, paid subscriptions	Standard timer screen	Yes, "Vibrate" setting	Shows heart rate on watch	Listing doesn't mention colour-changing screens
Apple Watch Workout app	Free with an Apple Watch	Small watch screen	Watch haptics, set to Prominent	It is the watch	Nothing extra to install. Test how it signals each change
Reptyl Timer	One-off purchase	Full-screen colour, huge numbers	Yes, at every change, including with the phone locked	No, iPhone only for now	Built silent-first. Sound is optional

Prices and features change, so check each listing before you buy.

7. How do I test a timer before a real session?

Five minutes at home will tell you more than any review.

Turn your phone to silent and take out your hearing aids, or set them as you would in the gym.
Set a short session: 20 seconds work, 10 seconds rest, 3 rounds.
Put the phone where it would be in the gym: on the floor, on a bench, against a water bottle.
Do the exercise and see if you notice each change without looking for it.
Try it from a few metres away. Can you read the numbers? Can you tell work from rest by colour alone?

If you miss a change, the app isn't right for that exercise, or you need a watch.

8. What else helps in a class or gym?

A few small things make a big difference:

Tell the instructor. Ask them to give a visual cue, such as a raised hand or a thumbs-up, when it's time to switch.
Stand where you can see the instructor and the wall clock.
Watch the room. When everyone stops, you'll see it. Not perfect, but a useful back-up.
Ask about the clock. Many gyms have big interval clocks on the wall with coloured lights. Ask if they can be set for your class.

Do I need an app for this?

If you only take one thing from this guide, make it this: choose a timer that tells you what's happening without sound. Big colour, big numbers, and a buzz you can actually feel.

Seconds is a strong free starting point, and the Apple Watch Workout app is already there if you have a watch.

How Reptyl helps

Reptyl is made by a profoundly deaf developer, and Reptyl Timer was designed silent-first.

Colour and a buzz. Every change fills the whole screen with colour and buzzes the phone. Sound is optional, not the main event.
Carries on if the app closes. Lock the phone, put it in your pocket or an armband, and it still buzzes at each change. That's the way to feel it with a phone alone.
Ready-made timers for treadmill sessions, Tabata, EMOM and plank sets, plus your own.

It's iPhone only and doesn't run on Apple Watch, so if you need to feel every change with the phone on the floor, a watch-based option may suit you better. It's a one-off purchase with no subscription, no account and no adverts, and your data stays on your phone. The Timer page has the details.

For more on the formats these timers run, see Tabata vs HIIT, EMOM vs AMRAP and interval timer basics.

Quick answers

Is there an interval timer that vibrates?

Yes. Several do, including Seconds Interval Timer and Interval timer - Workout Timer. An Apple Watch also uses wrist taps for alerts, which you can set to Prominent.

Can my phone flash for an interval timer?

Not reliably. iPhone's LED Flash for Alerts only works when the phone is locked, and timers usually keep the screen on. Look for a timer that changes the colour of the whole screen instead.

What's the best timer for a deaf person doing HIIT?

The one you can see and feel in your own gym. Test it with the sound off first. A watch helps most for feeling each change; a full-screen colour timer helps most for seeing it.

Want a timer built silent-first? See Reptyl Timer