How to Set a Timer on iPhone (Siri, Clock App, Control Center)

By Suraj Giri, Productivity Researcher · Updated 2026-05-27

To set a timer on iPhone: open the Clock app, tap Timers, choose a duration, pick a sound, then tap Start. The fastest method is Siri — say “Hey Siri, set a timer for 10 minutes.” Control Center, the Today View widget, and Apple Watch wrist gestures offer one-tap alternatives that work even when the iPhone is locked.

How Do You Set a Timer on iPhone Using Siri?

The voice route is the fastest. With Siri enabled, press and hold the side button (or say “Hey Siri” if Voice Activation is on under Settings > Siri & Search) and speak the phrase: “Set a timer for 25 minutes.” Siri confirms verbally and starts the countdown immediately. The timer runs from the Clock app even though the app never opened in the foreground.

Siri supports natural phrasing — “set a 5 minute timer,” “wake me up in 20 minutes,” and “start a pomodoro timer” all work. On iOS 17 and later, Siri can also set named multiple timers, which we cover below.

How Do You Set a Timer in the iPhone Clock App?

1. Open the Clock app (preinstalled, white-on-black icon).
2. Tap the Timers tab at the bottom right.
3. Scroll the hours, minutes, and seconds wheels to your desired duration.
4. Tap When Timer Ends to pick an alert sound from the system catalog or your Apple Music library.
5. Tap the green Start button.

The Clock app uses iOS-level scheduling, which means the alarm fires even if you lock the iPhone, switch apps, or the device enters Low Power Mode. This is the most reliable timer surface on the device.

How Do You Start a Timer From Control Center?

Control Center includes a Timer tile. Swipe down from the top-right corner (Face ID iPhones) or up from the bottom (Touch ID iPhones), then long-press the Timer icon. A vertical slider appears spanning 1 minute to 2 hours. Drag to your target, release, and the timer starts. This bypasses the Clock app entirely and is the fastest one-tap method for short cooking or interval timers.

How Do You Use the Today View Timer Widget?

iOS supports a dedicated Clock widget on the Home Screen and in Today View. Long-press an empty Home Screen area, tap the plus icon, search for Clock, and add the Timer widget. The medium-size widget shows running timers; the small size offers one-tap access to recently used durations. This is especially useful for repeat workflows like the Pomodoro timer where you want the same 25-minute interval on demand.

How Do You Set a Timer From Apple Watch on Your Wrist?

If you wear an Apple Watch paired to your iPhone, raise your wrist and say “Hey Siri, set a 5 minute timer.” The timer syncs across both devices via Bluetooth and Continuity, so the iPhone can finish a timer that the Watch started, and vice versa. The Watch buzzes the wrist with a haptic tap when the timer ends — useful when the iPhone is silenced.

How Do You Set Multiple Timers on iPhone?

iOS 17 introduced multiple concurrent timers in the Clock app. To add a second timer while one is running, open Clock > Timers and tap the plus icon in the top-right corner. Each timer can be named (“Pasta,” “Tea Steep,” “Laundry”) and assigned its own alert sound. The lock-screen Live Activity displays up to four running timers simultaneously. See our dedicated guide on how to set multiple timers on iPhone for the full workflow.

What Are the Best Timer Sounds on iPhone?

The default Clock app includes 20+ alert sounds. The most reliably audible options, based on frequency profile testing:

Does the iPhone Timer Work When the Phone Is Locked?

Yes. iOS schedules timers at the operating-system level rather than the app level, so the alert fires even if the iPhone is locked, in Low Power Mode, or on Do Not Disturb (timer sounds bypass DND by default). The only configuration that silences the timer is putting the iPhone in Silent mode with the ringer switch and volume at zero — and even then, the haptic tap remains.

Can the iPhone Timer Trigger HomeKit Automations?

Indirectly. The Clock app does not natively trigger HomeKit actions, but the Shortcuts app can. Build a shortcut that waits for a duration, then runs a HomeKit action (“turn off bedroom lights after 20 minutes”). This is the iOS equivalent of an Alexa Routine.

Frequently Asked Questions

Why doesn’t my iPhone timer make a sound?

Check that the alert sound is not set to “None” under When Timer Ends, and that the ringer volume (not the media volume) is up. Volume buttons control media by default; press them while the Clock app is open to adjust ringer volume.

How do I cancel a running iPhone timer?

Open Clock > Timers and tap Cancel. From the lock screen Live Activity, swipe the timer and tap the X. From Siri, say “cancel my timer.”

Can iPhone run a timer in the background?

Yes. The iOS Clock app uses scheduled local notifications, which fire regardless of app state. See our deeper write-up on why timers pause on mobile and the workarounds.

Is there a Pomodoro mode built into iPhone?

Not officially, but the Clock app’s multiple-timer feature lets you preset a 25-minute work timer and a 5-minute break timer side by side. For a richer experience, use our browser Pomodoro timer.

How accurate is the iPhone timer?

iOS timers are accurate to within a few hundred milliseconds — better than most kitchen timers and well within the threshold for any practical purpose.

Can I set a timer with my voice when the iPhone is locked?

Yes, if “Allow Siri When Locked” is enabled under Settings > Siri & Search.

For full citations and methodology, see our sources page.