The best timer app for iPhone: five tests, not a ranking
Every timer app looks identical in the screenshots. They differ in the five minutes after you install one, so here are five tests you can run yourself instead of trusting a list. NanoTimer is ours and we will tell you where it loses too.
Why best-of lists are useless here
A timer is not a feature race. Every app in the App Store can count down from ten minutes, so a list of checkmarks tells you nothing. What separates them is whether the countdown survives contact with a real phone: locked, in a pocket, music playing, three apps deep.
That is invisible in a screenshot and invisible in a feature table. It shows up in the reviews, where the same four complaints repeat across app after app. Those four are the tests below.
Test 1: start a timer, then lock your phone
Lock the screen, put it in your pocket, wait five minutes past the end. Did it go off, and was the remaining time still correct when you looked?
This is the one that fails most often, and it is a design problem rather than a bug. An app that counts by ticking a number down every second gets suspended in the background and quietly loses time. An app that stores the end time and compares against the clock cannot drift, whatever iOS does to it. You cannot see which kind you have until you test it, so test it before you rely on it.
Test 2: play music, then run the timer
Put on a song or a podcast and start a timer with cues. Three things can happen. Your music keeps playing and dips briefly for the cue, which is correct. Your music pauses and does not come back, which is infuriating. Or the cue plays over the top at full volume and you hear neither.
In the reviews we read, ducking is both the most praised feature when it works and the angriest complaint when it does not. It is also the thing most likely to sit behind a paywall, which is why it is worth testing on day one rather than day thirty.
Test 3: use it four or five times
Not once. Four or five times, across a couple of days. This is where the business model shows up: the limit that appears after the third workout, the subscription prompt on day four, the feature you already used that is suddenly Pro.
"Misleading free" is the single most common phrase in the negative reviews of timer apps. Free-to-download and free-to-use are different claims, and the App Store listing does not distinguish them. Five uses does.
Test 4: put the phone face down and listen
Can you follow the timer without looking? A timer you have to watch is a clock. The useful version tells you what is happening: spoken cues, a clear end signal you can hear over music, something you can feel.
Beeps are the cheap version. A beep tells you something happened, not what. If you are cooking, training or working, the difference decides whether you can put the phone down at all.
Test 5: try to break it in the first thirty seconds
Set a timer for one minute, pause it, background the app, come back, resume it, reset it. Set another while the first runs. Rotate the phone. Nothing here should be exciting. If something jumps, resets or ends up at a strange number, you have found out cheaply.
Where NanoTimer lands
It is built for those five. Timing is anchored to the clock rather than a ticking counter, so locking the phone or backgrounding the app cannot drift. Your music keeps playing and dips only for a cue. Cues are spoken words, not beeps, in five languages. All of that is free, permanently: the contract behind the app names voice cues, beep, haptics and music ducking as things that can never move to Pro.
Free also covers every timer and interval type, the stopwatch, meditation, the alarm, Live Activity, the widget and up to five saved items per type. Pro is a one-time 6.99 euro for comfort: an unlimited library, deeper stats and personalisation. There is no subscription and there are no ads anywhere.
Where it loses
It is small. If you want a timer welded to a recipe app, a habit tracker, a social feed or a shopping list, this is the wrong app and we would rather say so now. It is also not in the App Store yet, so today you can only try the web tools here.
And on iOS below 26 the alarm cannot use AlarmKit, so it falls back to a notification like everyone else's. We would rather write that down than let you find out at 7am.
Run the tests on NanoTimer
Try the timer here in your browser first, or open it on your phone. The app follows as soon as it is in the App Store.
Frequently asked questions
- Is a paid timer app better than a free one?
- Not automatically, and the price model tells you less than the tests do. What matters is whether the parts you rely on, like the countdown surviving a locked screen and cues that do not kill your music, are the parts you have to pay for.
- Why do so many timer apps use a subscription?
- Because it earns more than a one-time price, not because a timer costs anything to run. There is no server behind a countdown. If an app charges monthly, it is fair to ask what recurring cost it is covering.
- What is the difference between a timer app and the Clock app?
- For a single countdown, very little, and Apple's Clock is fine. A separate app earns its place when you need several presets, intervals with phases, spoken cues, or a stopwatch and alarm that share one place. If you only ever set one ten-minute timer, use the Clock.
- Which timer app is best for the gym?
- That is a different question, because you need phases rather than one countdown, and cues you can hear mid-set. We have a separate page on picking an interval timer app.