| What it does | Free calculators for sleep, mental wellbeing, recovery, fitness, nutrition and healthy living
| Free Four Pillars chart and analysis with auditable calculation and optional AI-powered readings
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| Stage | Not given
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| Pricing model | Free
| Freemium
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| Pricing | Not given
| Free Bazi chart with no account required. Personal Bazi Report costs $14.99 USD per saved chart, one-time payment with no subscription, available in English, Traditional Chinese or Japanese. Free summary available for saved charts.
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| Key features | - Sleep Cycle Calculator for planning bedtimes based on 90-minute cycles
- Bedtime Calculator to find sleep time based on wake-up time and duration
- Wake-Up Time Calculator based on bedtime and sleep cycles
- Sleep Debt Calculator to estimate missed sleep over a week
- Caffeine Half-Life Calculator to estimate caffeine remaining in body
- How Much Sleep Do I Need Calculator with age-based estimates
- 20 calculator hubs across Sleep, Mind, Body, Family and Lifestyle categories
- Transparent formulas showing the math behind each result
- Evidence-based references citing primary sources
- Editorial and clinical review for sensitive health tools
| - Four Pillars of Destiny chart generation
- Day Master identification
- Five Elements balance analysis
- Ten Archetypes (Ten Gods) reading
- Decade-by-decade Life Chapters
- True solar time correction
- Shareable chart with OG image
- Optional AI-powered readings for deeper interpretation
- Three-pillar analysis when birth time is unknown
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| What makes it different | - Private calculations in browser with no account required or personal data selling
- Transparent formulas and methodology for every calculator
- Evidence-based content citing primary sources not rewrites
- Regularly updated formulas with versioning and review dates
| - Calculation before interpretation: deterministic chart generation by rule, with AI only explaining results upon request
- Privacy-first approach with no required account and transparent data handling
- Based on classical Chinese texts with auditable, reproducible calculation methods
- Transparent editorial boundaries separating calculation, tradition, interpretation, and AI
- True solar time method with historical UTC offset and birth-city longitude for accurate Hour Pillar placement
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 17 ● no change since last check | 18 ● no change since last check |
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| Trust Flow (Majestic) | 0 | 18 |
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| Citation Flow (Majestic) | 10 | 25 |
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| Referring domains (Majestic) | 16 | 63 |
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WowSleepCalculator
BaziCalculator.ai