| What it does | Free birth chart calculator with AI interpretation from your birth data
| Free one rep max calculator with seven formulas and percentage charts
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| Stage | Not given
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| Founded | Not given
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| Based in | US
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| Pricing model | Freemium
| Free
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| Pricing | Free birth chart calculation with 3 AI questions. Full Reading upgrade $9.99 one-time includes complete interpretation, PDF report and 20 AI questions. Yearly Forecast upgrade $9.99 one-time. Couple Reading upgrade $14.99 one-time for synastry, composite chart and relationship interpretation.
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| Key features | - Full birth chart calculation with planets, houses and aspects
- Professional ephemeris data for accurate planetary positions
- Downloadable PDF birth chart report
- Open-source calculation engine for transparency
- Educational content on signs, planets, houses and aspects
- No guessing: omits features requiring unknown birth time
| - Seven 1RM formulas (Epley, Brzycki, Lombardi, Lander, Mayhew, O'Conner, Wathen)
- Average of all formulas as recommended result
- Percentage chart from 100% to 50% of 1RM
- Rep-max table for 1RM through 12RM
- Support for kilograms and pounds
- Exercise-specific formula defaults
- RPE adjustment for reps in reserve
- Multiple exercise categories (chest, back, legs, shoulders, arms, Olympic)
- Browser-based history with no account
- Warm-up sets calculator and rep-max table
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| What makes it different | - Open-source calculation engine allows independent verification of methodology
- AI interpretation synthesizes your entire chart rather than reading each placement in isolation
- Treats astrology as reflective language, avoids fear-based predictions
- Birth data treated as private and never sold
| - Uses seven published formulas instead of one, showing average and range for transparency
- No account, sign-up, or data storage required
- Covers dozens of exercises with exercise-specific guidance and lift variations
- Warns about formula accuracy limits and when estimates are unreliable
- Includes linked tools for related calculations (DOTS, Wilks, training max, FFMI, VO2)
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 18 ▼ −1 (down) since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 18 | 0 |
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| Citation Flow (Majestic) | 10 | 0 |
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| Referring domains (Majestic) | 36 | 0 |
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GetBirthChart
OneRepMax