Complex Timer

4.5
679 reviews
50K+
Downloads
Content rating
Everyone
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About this app

Create custom countdown patterns exactly the way you like.

After trying several apps and failing to find one that suited all my needs, I decided to write Complex Timer.
Initially developed for sport climbing training: intermittend dead-hangs, fingerboard, or strength-endurance methods, it is very useful if you perform sport training methods like HIIT (high intensity interval training), cross fit, cross training, running, tabata, etc.., Also to control your pauses at work, while studying or rehearsing an exam and for cooking.

Features:
- Full German translation, credit goes to Thomas Grittner and Stefan Weber
- Russian translation
- Backup and restore your sessions
- Copy a session to use it as a template for a new one
- Group countdowns that repeat several times
- Nest a group inside another one to create complex patterns
- Move countdowns or whole groups up/down or even inside/outside groups
- Copy countdowns or groups to save time
- Goup and countdown descriptions are customizable
- Set the type of alarm that will be played before a countdown starts, so that you know if a pause or a work segment comes next
- Set an alarm to warn you before the time is up
- Choose among 9 different colors for each countdown
- Skip any particular repetition(s)
- Choose whether the session will pause when a countdown ends
- Skip backward/forward while running a session
- Keep the screen on while running a session
- See the complete session in list form to have a visual reference of what it's going to look like, and use it to skip to any particular countdown
- Run, pause and reset the session from the lockscreen notification
- Receive an alarm that indicates the whole session has ended
- Maximize the counter for better readability and use basic control gestures
- Custom notifications: choose your own sounds from your device's storage, or mute any of them
- Custom relative volume: when listening to music while using the app, you can lower the notifications volume relative to the music volume
- The total work time for each Session is displayed in the main screen
- Option to vibrate instead of/in addition to playing a sound. Good for very noisy or very quiet environments
- Add random variation to any Countdown inside the limits you establish.
- Navigate to any desired Countdown using a Seek Bar.
- Skip back/forward to any moment in the current Countdown, even while running, using a Seek Bar
- Mute the nofications while running a Session
- Use text-to-speech to know how much time is left or hear the next Countdown description in your own language (contact me if you want your language to be supported)
- Share one or more Sessions with other users via email, instant messaging, etc.
- Choose between showing the elapsed time or the remaining time for each interval.

Permissions: it needs Storage permission if you want to backup and restore your sessions.
Updated on
Mar 25, 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
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No data collected
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Ratings and reviews

4.5
636 reviews
J Tyson
May 7, 2025
I have a problem with my mind drifting off while I'm showering, so that I repeatedly forget what I've washed and then take a long time. I set this app to list off the body parts at timed intervals, so that I race against the app and shower quite efficiently. I've found that it is not worth using soap when the bar gets tiny, because it slows the shower down so much that it isn't worth the water. Also, it's quicker to lather with both hands, instead of one.
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Ryan Zerbe
July 15, 2020
Awesome simple app. I use this for a couch to 5k program. I had to add them all manually, but exactly what I was looking for. I use GPS and HR from another app, so just the timers is what I needed. If there was one thing I'd like is to add another warning timer. You only get 1 and I use that for around half way marks in my runs, but for longer runs, being able to add more say every quarter would be cool.
4 people found this review helpful
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A Google user
November 29, 2019
Really great! But for only one type of activity. I'm flabbergasted that we can only set global sound/notification settings. I don't know anyone who would use the same sound settings for library study sessions as they would a noisy gym workout routine! So surprised that we can't set sounds at the routine building level.
3 people found this review helpful
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What’s new

Compatibility with latest Android versions. Some bugs fixed.