An interval timer that works with Spotify

Updated 6 November 2026

Mixing with your music is a choice each timer app makes, and not all of them make it. A timer that makes the choice badly will either cut your music off at the first beep, or play its cues at the same volume as the track so you cannot hear “ten seconds” over the chorus.

You do not need to read an app’s feature list to find out. You can check any timer in half a minute, and the steps are below.

Why some timers stop your music

Phones let one app play sound at a time unless an app asks to share. The rules differ between the two platforms, but the idea is the same.

On iPhone, an app declares how it plays audio. Apple’s documentation for the duckOthers option says it “reduces the volume of other audio sessions while audio from this session plays,” and that it implicitly turns on mixing. It also says that if an app clears that option, “activating your session interrupts other audio sessions.” In plain words: an app can lower your music for a moment, or it can stop your music, and the developer picks one. Apple adds that ducking is meant to be temporary: apps should not use it to lower other audio for more than a few seconds. For an app that makes occasional spoken announcements, such as an exercise app, Apple suggests a second option as well.

On Android, the system has a notion of audio focus: only one app holds it at a time. Android’s documentation says that when another app requests focus, the app that has it should pause or lower its volume. A short sound can ask for focus in a way that says “it’s fine to keep playing, just turn down,” and since Android 8.0 the system can do the ducking itself. But if an app asks for full focus, then on Android 12 and later the system fades out the playing app, and your music stays muted until it asks for focus again. A timer that grabbed full focus for every beep would make your music fade out and stay out.

You will not see any of this in an app’s screenshots. You see it in what happens to your song.

How to check a timer in 30 seconds

Do this before you trust a timer with a whole workout, on the phone and headphones or speaker you will use.

1. Start your music in Spotify or Apple Music, at the volume you work out at.
2. Set the timer to something short: 5 seconds of work and 5 seconds of rest, 3 rounds.
3. Start it and put the phone down. Do not touch it.
4. Listen for three things. Does the music keep playing through the first cue? Can you hear each cue clearly over the music? Does the music return to full volume afterward?
5. Lock the screen and run it again. The cues should keep coming. If they stop when the screen goes dark, the timer will fail in the middle of a workout.
6. Skip to the next track while the timer runs. Some timers lose their place when another app changes the audio.

If the music stopped at step 4, the timer interrupts rather than mixes. If it only stopped on the first cue, check the app’s settings for an option such as “mix with other audio” or “duck music”; some apps have one. If you cannot find it, that timer is not the one.

We have not run this test across every timer on the market, and results change with app updates, so treat any list that says “these ones work” with suspicion, ours included, until you have run the test yourself.

Set the voice and music so cues are heard

Even a timer that mixes perfectly can lose to a loud song. A few things that help:

• Try words instead of beeps. “Switch, ten seconds” can be easier to pick out of a song than a short tone; test both and keep what works for you. Speech is also useful when you cannot look at the screen, and you do not need to learn which beep means what.
• Keep the music a notch below your usual volume for the first session, then raise it once you know the cues are clear.
• Check the timer’s own volume. Some timers follow the media volume, some the ringer. Press the volume buttons while the timer is speaking and see which one moves.
• Choose music with a steady energy. A track with a very quiet section can make the next cue seem loud, and a drop can bury it. This is a matter of taste, not a rule.

Using it with earbuds or a Bluetooth speaker

Both work. The timer sends its sound to whatever output your music uses. On a speaker, test from where you will stand: cues that were clear from the bench may be harder to hear from across a room.

One thing to know about earbuds. The play/pause button on earbuds goes to one app at a time. When your music app is playing, the button controls the music, not the timer. If you want to pause the workout mid-session, use the timer’s own controls, such as its lock-screen pause button. On iPhone we have not verified how any timer shares the button, so test yours. Countcall is designed so its voice plays over your music; with music on, pause from the lock screen (on iOS 17 or later) rather than from the earbuds.

If you use the phone’s own Clock timer

The Clock app on iPhone gives you a countdown: you set a length and a sound for when it ends, and Apple’s guide says “the timer continues even if you open another app or if iPhone goes to sleep.” It describes a single countdown and does not mention repeating work and rest. For intervals you would have to restart it every time, so see how to set an interval timer on iPhone or Android.

Apple’s guide also describes a “Stop Playing” choice under When Timer Ends, meant for falling asleep to audio. That is useful for a sleep timer and is the opposite of what you want mid-workout, so check which end sound your Clock timer is set to.

On Android, Google’s Clock app counts down and can run several timers at once. We found no repeat or interval setting described for it. Manufacturer clock apps, such as Samsung’s, differ, so check yours.

Try it in Countcall

Countcall is built around this case. Your music keeps playing, and by default it dips while the voice speaks (a setting you can switch off). Spoken audio such as podcasts and audiobooks pauses during a cue instead of dipping. On Android, and on iPhone with iOS 17 or later, the timer sits on the lock screen. The app is not in the app stores yet, so you cannot test it today; join the waitlist below to hear when it is, then run the 30-second test on it. We would rather you check than take our word for it.