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For focus

A Pomodoro timer that runs your whole study plan.

Chain focus sprints and breaks into one sequence — classic 25/5, deep-work 50/10, or your own rhythm — and let it flow from first sprint to last break without a single tap.

Download Free on iPhone

Free · Pro unlock $4.99 · No account needed

ChainFlow running a Focus Block work interval with a large countdown

Beyond the fixed 25 minutes

The Pomodoro technique is a great start — but real focus rhythms vary. ChainFlow lets every block be a different length, so you can chain a warm-up sprint, deep-work blocks, longer breaks after every fourth cycle, and a hard stop — a full plan that runs itself.

01

Design your rhythm

Add focus and break blocks of any length. See the total planned time before you start.

02

Phone down, focus up

A gentle cue marks each transition even with the screen off — no need to watch the clock.

03

Save your plans

Keep a "deep work" chain, an "exam cram" chain, a "reading" chain, and start any in a tap.

Focus rhythms to try

MethodPatternBest for
Classic Pomodoro25m focus / 5m break × 4, then 20mGeneral study
Deep work50m focus / 10m break × 3Writing, coding, research
Sprint & recover90m focus / 20m break × 2Flow-state work
Exam cram30m / 5m × 6 with a 30m resetLong revision days

Questions

Can I customize the intervals?

Yes. Skip the rigid 25/5 — chain focus and break blocks of any length, in any order, into one plan.

Does it run in the background?

Yes. Your plan keeps running and cues each transition even when the screen is off, so you can put the phone away.

Can I save different study plans?

Save as many as you like and start any in a tap — deep work, revision, reading, and more (Pro).

Is it free?

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

Also great for

Start a focus session that runs itself

Free on the App Store. Build your study plan in under a minute.

Download ChainFlow