Frequently Asked Questions
Common questions about the free Japanese interval walking timer — how the IWT method works, audio cues, wake lock, and more.
What is the Japanese interval walking method?
It's a walking routine that alternates a few minutes of brisk, faster walking with a few minutes of slower, easier walking, repeated several times. The classic version is three minutes fast and three minutes slow, repeated five times for about 30 minutes.
How does the interval walking timer work?
Press start and the timer counts down each interval, plays an audio cue when it's time to switch between fast and slow walking, and tracks how many sets you've completed and your total time — hands-free.
Is this timer free to use?
Yes, it's completely free with no sign-up, downloads, or limits. Use it for as many sessions as you like.
Will the audio cues play if my screen is off or phone is in my pocket?
Yes. The timer uses the Web Audio API so the cues sound reliably even when your screen is locked or the tab is in the background.
Does the screen stay on during a session?
On supported browsers the timer uses a screen wake lock to keep your display awake so the session doesn't get interrupted. On browsers that don't support it, the timer still runs and the audio cues still play.
Can I change the interval lengths and number of sets?
Yes. You can adjust the fast and slow interval durations and the number of repeats to match your fitness level, or stick with the standard 3-min/3-min × 5 routine.
Do I need any equipment?
No. You only need somewhere to walk and your phone or device for the timer — no special gear required.
Is my data stored anywhere?
No. The timer runs entirely in your browser and doesn't store or send any personal data to a server.
Does it work on mobile devices?
Yes, the timer is fully responsive and designed for use on a phone while walking, as well as on tablets and desktops.
Is interval walking suitable for everyone?
Interval walking is gentle and popular across fitness levels, but everyone is different. This tool is a timer, not medical advice — if you have any health conditions or concerns, check with a doctor before starting a new exercise routine.
This tool provides general information and is not medical advice. Exercise intensity should match your own fitness and health. Please consult a physician before starting a new exercise routine or training at high intensity—especially if you have any heart condition, injury, or health concern.