Nadi vs CircadiaOS
A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.
Nadi compared with CircadiaOS
| Detail | 
Nadi | 
CircadiaOS |
|---|
| What it does | Your cycle as foundation for how you feel, live and work
| The thermostat schedule that learns from your sleep
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| Stage | MVP
| Not given
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| Founded | 2023
| Not given
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| Based in | GB
| US
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| Pricing model | Free trial
| Freemium
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| Pricing | Not given
| Free: starting temperature schedule, optional wearable connection, nightly sleep data and trends, no thermostat control. Premium (monthly): $12.99/month with automatic thermostat control, four-phase schedule, 14-night starting period, one-variable-at-a-time adjustment from wearable data, 14-day free
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| Key features | - No app download required
- Works with smartwatches that display calendar
- Shows all four menstrual cycle phases
- BS ISO 45010 workplace sessions
- Encrypted data storage on EU servers
- Customizable phase names
- Free BS ISO 45010 workplace scorecard
- Free resources and community newsletters
- GDPR compliant data protection
| - Four-phase overnight temperature schedule (pre-sleep, early night, late night, pre-wake)
- One-variable-at-a-time personalization held for 7 to 14 nights per change
- Wearable integration: Apple Watch, Oura Ring, Whoop, Garmin, Fitbit
- Thermostat compatibility with Nest, ecobee, Honeywell Home and 20+ brands
- 14-night starting period and reference point on Premium
- User-set temperature floor and ceiling, never below 63°F
- Why This Curve display showing where each setpoint came from and data behind it
- Best vs Worst nights comparison showing highest and lowest scoring nights
- Manual override capability with automatic resumption next night
- Referral program earning free months of Premium for every three friends who join
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| What makes it different | - Integrates with calendars you already use rather than requiring a separate app
- Plans around all four cycle phases for awareness and energy management
- Data privacy with no selling to advertisers or insurers
- Grounded in BS ISO 45010 workplace guidance for organizational support
- Built by founder from personal experience and research with 153 women
| - No new hardware required—works with your existing smart thermostat and wearable
- Software-first approach running sleep algorithms on your thermostat rather than requiring specialized cooling beds
- Personalization through one-change-at-a-time adjustments graded against your own sleep data
- Complete transparency showing where every setpoint comes from and how much data supports it
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 2 ● no change since last check | 13 ● no change since last check |
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| Trust Flow (Majestic) | 2 | 4 |
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| Citation Flow (Majestic) | 21 | 24 |
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| Referring domains (Majestic) | 11 | 47 |
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5 details filled in for both companies.
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