| What it does | Free Four Pillars of Destiny chart calculator with true solar time
| Electronics calculators for makers
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| Stage | Not given
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| Founded | Not given
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| Based in | Not given
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| Pricing model | Freemium
| Freemium
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| Pricing | Charts and tools free. AI readings: 1 reading for $4.99, 3 readings for $9.99, 10 readings for $19.99.
| Free: $0 forever. Pro Monthly: $4 per month, cancel anytime. Pro Lifetime: $29 one-time payment.
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| Key features | - Four Pillars with hidden stems and heavenly stems and earthly branches
- Day Master calculation and analysis
- Ten Gods relationship mapping
- Five Elements distribution with visible and hidden stems
- Luck Pillars with ten-year periods and annual pillars
- True solar time calculation with longitude and equation of time correction
- Two-chart comparison showing stem/branch relations
- Export and print functionality including PDF and JSON download
- Time range input for uncertain birth times
- Bilingual interface in English and Simplified Chinese
| - Resistor Color Code: read 4, 5 and 6-band resistors or find bands for a value
- LED Resistor: pick the current-limiting resistor and power rating
- Voltage Divider: output voltage, loading effect, or solve R2 for target Vout
- RC Filter: cutoff frequency, time constant and attenuation at any frequency
- LC Resonance: resonant frequency, characteristic impedance and Q
- 555 Timer: astable frequency/duty cycle and monostable pulse width
- Battery Life: runtime from capacity, active/sleep current and duty cycle
- PCB Trace Width: IPC-2221 trace width for current and temperature rise
- Electronics Unit Converter: SI prefixes, AWG to mm², mil to mm, dBm to mW, oz copper
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| What makes it different | - All calculation rules published and adjustable, showing which rule produced each result
- Solar-term boundaries computed astronomically to the minute with historical time zone accuracy
- No prediction claims; presents charts as cultural and reflective, not scientific forecasts
- Works without birth time by showing stable and candidate pillars
- No account required for calculation; optional saving and one free AI reading after Google sign-in
| - Real E-series resistor values, not ideal numbers
- Engineering notation input and result sharing as links
- No ads, no tracking, no sign-up for free calculators
- Whole-device BOM costing and battery-life summary in Pro
- Works on phone at the bench
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 11 ● no change since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 9 | 0 |
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| Citation Flow (Majestic) | 30 | 0 |
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| Referring domains (Majestic) | 45 | 0 |
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