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Circuit Timer for Custom Workouts

Real circuits don't have uniform stations. ChainFlow lets each exercise and each rest period run for exactly as long as you need, then moves you to the next station automatically.

Download Free on iPhone

Free · Pro unlock $4.99 · No account needed

ChainFlow chain builder showing a HIIT circuit with Warm-Up and Jumping Jacks, looping enabled

Why ChainFlow works for circuits

A fixed-interval circuit timer assumes every station takes the same time and needs the same recovery. Real circuits don't work that way — a heavy station might need a longer rest than a light one. ChainFlow lets you set each station and each rest independently.

Independent station lengthsNo station has to match another's duration.
Independent rest periodsGive harder stations more recovery, lighter ones less.
Loop the whole circuitRun it for as many rounds as you want without rebuilding it.
Audio cues, hands-freeDistinct sounds mark every station and rest change.

Example routine

StationDuration
Push Ups0:40
Rest0:20
Goblet Squat0:50
Rest0:15
Rows0:45
Rest0:30

How to use this routine with ChainFlow

01

Create or choose the routine

Build your circuit from scratch, station by station.

02

Set durations and order

Time each station and rest period independently, then set the order.

03

Start the chain

Press play — it moves through every station and rest automatically, looped if you want.

Questions

Do all my stations have to be the same length?

No — that's the difference from a standard circuit timer. Each station and each rest period can be a different length in the same circuit.

Can I set different rest periods between stations?

Yes. Give a heavier station a longer recovery and a lighter one a shorter one, all in the same circuit.

Can I loop the whole circuit for multiple rounds?

Yes. Turn on looping and the full circuit repeats automatically for as many rounds as you want.

Does it work with the screen off?

Yes. Audio cues mark every transition even when your phone is locked.

Is it free?

Free to download and use. A one-time $4.99 Pro unlock adds unlimited saved circuits and cloud sync.

Also great for

Build your circuit in a minute

Free on the App Store. Set your stations and press play.

Download ChainFlow