Nurses, traders & all shift workers

Sleep planning built for the people who keep everything running.

CircaFlow turns your shift schedule into a daily sleep plan — with clinical tracking, validated health scores, and a report you can hand to your doctor.

Night nurses. Floor traders. Pilots. Freight drivers. Anyone whose schedule fights their biology.

Coming soon on Google Play See how it works

Free to use. No subscription required to track your sleep.

9:41

Monday · Night shift tomorrow

Today's Plan

Sleep window

23:30 – 07:30

8h · High confidence

Caffeine cutoff

15:30

7-day efficiency

84%

Sleep debt

−1h 20m

ESS score 8 / Normal

The problem

Sleep apps weren't built for you.

Every sleep app assumes you go to bed at the same time every night.

1 in 5

workers worldwide on shift schedules

2×

higher cardiovascular risk than day workers

0

mainstream sleep apps built for rotating schedules

If you work nights, rotating shifts, or early starts, that advice is useless. Your body clock runs on a fixed rhythm — your schedule doesn't. You're permanently fighting your own biology. The result: chronic sleep debt, exhaustion you've stopped noticing, and doctors who don't have the data to help.

Circadian misalignment

Your brain releases melatonin at the same time every day, whether you're on days or nights.

Rotating shifts

Your body takes ~1 day per hour of shift change to adapt. Rotating schedules change before it can.

No clinical data

"I'm always tired" isn't a useful data point for a doctor. You need numbers.

The solution

A sleep planner that actually understands your schedule.

CircaFlow is built around one idea: your shift schedule should drive your sleep plan, not the other way around.

01

Shift-aware daily plan.

Based on circadian science, not generic advice.

Every day. Updated for your next shift.

02

Clinical sleep tracking.

Diary, statistics, validated questionnaires (ESS + ISI).

SOL, WASO, efficiency — numbers your doctor can act on.

03

Clinician-ready reports.

One tap to a PDF your doctor can actually use.

"I'm always tired" becomes a conversation with data.

Add your shifts. Tell us your chronotype and commute. CircaFlow calculates your optimal sleep window, caffeine cutoff, light exposure timing, and nap opportunity — every day, updated for your next shift. It also tracks your sleep clinically, scores your sleepiness and insomnia with validated medical scales, and generates a PDF report you can give to your doctor.

Features

Everything a shift worker needs to sleep better.

Core features are permanently free. No trial period, no hidden paywall.

Free Free + Pro Pro

Swipe to explore

Daily Sleep Plan

Built fresh every day from your upcoming shifts.

  • Sleep window with start and wake times
  • Caffeine cutoff
  • Light exposure guidance
  • Optional melatonin timing
  • Pre-shift nap window
  • Plain-language advisory notes

ESS + ISI Questionnaires

Two clinically validated sleep scales.

  • ESS: daytime sleepiness (0–24)
  • ISI: insomnia severity (0–28)
  • Re-takeable, trackable over time
  • ~2 minutes each

Clinician PDF Report

One tap. A document your doctor can use.

  • 30-day sleep summary
  • ESS + ISI scores with interpretation
  • Full diary table (up to 60 nights)
  • Medical disclaimer included

CSV Export

Your data, always yours.

  • Full diary history as CSV
  • No paywall on export
  • Use in Excel, Google Sheets, research
Free · Pro

Sleep Diary

Clinical-grade logging, not just hours slept.

  • SOL, WASO, efficiency, quality
  • Awakenings and total sleep time
  • Influencing factors (caffeine, stress…)
  • Free-text notes
  • 30-day history free — unlimited with Pro
Free · Pro

Sleep Statistics

Free: 7, 14 & 30 days. Unlimited with Pro.

  • Average total sleep
  • Average efficiency
  • Average quality score
  • Nights logged
  • Unlimited history with Pro
Pro

Health Connect

Wearable sleep data, automatically synced.

  • Samsung, Fitbit, Garmin, Withings
  • Any Health Connect-compatible device
  • Flows directly into your diary
Pro

Sleep Data Import

Already tracked somewhere else?

  • Import from compatible CSV formats
  • No manual re-entry
  • Bring your full history on day one

Built for clinicians too

The gap between shift worker and doctor just got smaller.

For years, getting useful sleep data to a clinician meant booking a sleep lab, keeping a paper diary for two weeks, and hoping your memory was accurate. CircaFlow closes that gap.

Whether you're a night nurse, a floor trader, or a freight driver — shift workers go years without clinical support because they don't have the data to justify it. Now they do.

Your doctor gets:

  • 30-day sleep summary with averages
  • ESS score with clinical interpretation
  • ISI score with clinical interpretation
  • Full night-by-night diary table
  • Medical disclaimer

From a beta user

"I told my GP I was exhausted for two years. First time I brought a CircaFlow report, it was a completely different conversation."

— Night shift nurse, beta user

Scientific basis

Johns MW (1991) — Epworth Sleepiness Scale Morin CM (1993) — Insomnia Severity Index IARC Monograph 124 (2019) — Shift work & cancer risk Czeisler CA (2011) — Circadian sleep-wake cycle review

Pricing

Free to track. Pro when you're ready for more.

The core features — daily plan, sleep diary, questionnaires, clinician reports — are permanently free.

Free

€0

Forever. No credit card.

  • Daily sleep plan
  • Shift schedule management
  • Sleep diary (full clinical)
  • Statistics — last 30 days
  • ESS questionnaire
  • ISI questionnaire
  • Clinician PDF report
  • CSV export
Coming soon on Google Play

CircaFlow Pro

Pro

TBA

Monthly or yearly · via Google Play

  • Everything in Free
  • Unlimited sleep history
  • Health Connect — wearable sync
  • Sleep data import
  • Automated daily plan reminders
  • Advanced rotation planning
  • Extended clinician report (90 nights)
  • Circadian alignment score
  • Smart light & melatonin alerts
Available at launch

The free plan is not a trial. Clinical tracking, diary, and reports are free forever. History is limited to 30 days on Free — Pro unlocks unlimited history.

Available in your language

Shift workers don't all speak English. Neither does CircaFlow.

The app detects your device language automatically.

English
Français
Deutsch
Español
Nederlands

More languages in development.

Questions

Frequently asked

Is CircaFlow a medical app?
No. CircaFlow is a planning and tracking tool based on conservative circadian science. It is not a medical device and does not diagnose or treat any condition. Questionnaire scores (ESS, ISI) are screening tools — discuss them with a healthcare provider, not as self-diagnoses.
Do I need to pay to use the sleep diary and clinician reports?
No. The sleep diary, questionnaires, clinician PDF reports, and CSV export are all free, permanently.
What devices and wearables are supported?
CircaFlow connects to Android Health Connect (Pro feature). This includes Samsung Galaxy Watch, Fitbit, Garmin, Withings, and any device that writes sleep data to Health Connect.
Does CircaFlow work for on-call or irregular schedules?
Yes. You can add shifts manually for any pattern — fixed nights, rotating blocks, early starts, or irregular one-off shifts. The daily plan adapts to whatever is upcoming.
Is my sleep data private?
Yes. Your data is encrypted in transit and at rest. CircaFlow does not sell your data, does not share it with third parties for marketing, and does not use it to train AI models. You can export or delete your data at any time.
Is iOS supported?
Not yet. Android is available now. iOS is on the roadmap.
Can I import my existing sleep data?
Yes. CircaFlow supports importing sleep records via CSV. If you've been tracked by another app, a wearable export, or compatible clinical software, you can bring your full history into CircaFlow without manual re-entry.
How does the clinician report work?
Go to the Records screen → tap "Clinician Report". CircaFlow generates a PDF on your device containing your 30-day sleep summary, ESS and ISI scores with clinical interpretation, and a full night-by-night diary table. Share via your device's native share sheet.
What are the ESS and ISI questionnaires?
The ESS (Epworth Sleepiness Scale) measures daytime sleepiness on a scale of 0–24. Developed by Dr. Murray Johns in 1991, it is one of the most widely used clinical tools worldwide. Scores above 10 suggest excessive daytime sleepiness worth discussing with a doctor. The ISI (Insomnia Severity Index) measures insomnia severity on a scale of 0–28, validated by Dr. Charles Morin. Both take about 2 minutes and are used in clinical practice and research. CircaFlow lets you retake them as often as you like and tracks your scores over time.
Is there a web version?
Not currently. CircaFlow is an Android app. The website is for information only.

Start tracking tonight.

Free. No credit card. No trial period. Install in under a minute. Log your first night in under 30 seconds.

Coming soon on Google Play

Android · Free to download

Follow progress on X @CircaFlow