| What it does | Ascendant calculator for Italy and the world with IANA timezone conversion and historical rules
| Offline calculators for electricians, builders and HVAC technicians
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| Stage | Not given
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| Founded | Not given
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| Based in | IT
| US
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| Pricing model | Free
| Freemium
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| Pricing | Not given
| Free: nine calculators (voltage drop, Ohm's law, watts to amps, concrete slab, roof pitch, board feet, BTU, CFM, BTU to kW), no time limit. Pro: $9.99 per year or $19.99 lifetime (one payment, no renewal).
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| Key features | - IANA timezone conversion with historical rules for accurate local to UTC conversion
- Supports over 7,800 Italian cities and 165,000 global cities
- Shows margin of error with ±15, ±30, or ±60 minute options
- Multi-level personalized reading including base description, decan analysis, and sun-ascendant synthesis
- Daylight saving time automatically applied based on historical rules for location and date
- All calculations processed locally in browser with no data sent to external services
- Cusps warning to alert when result is near a zodiac sign boundary
- Monthly table tool for quick checks across different times and signs
- Combined moon and ascendant calculator in one tool
- Chrome extension for quick ascendant checks from the browser
| - Wire sizing and voltage drop calculations
- Conduit fill and box fill calculations
- Offline operation with no network required
- Transparent calculation steps and NEC warnings
- Job organization and PDF/CSV export
- Motor and generator sizing calculators
- Power and conversion calculators
- Building calculations for concrete and roof pitch
- No ads and no account required
- Private with data staying on device
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| What makes it different | - Transparent about uncertainty: displays margin of error and warns when result is near sign boundaries
- Uses reliable IANA timezone database with historical rules, not approximations
- Privacy-first: all computation happens locally in the browser without storing or sending personal data
- Clear explanations of calculation method, limits, and how to interpret results
- Independent project maintained transparently by a single developer
| - Works completely offline with no network or cellular signal required
- Private by design with no account, no ads, and calculations never leaving your device
- Shows exact NEC formulas and calculation steps so you can verify results before fieldwork
- Over 35 specialized calculators covering electrical, building and HVAC trades
- Tested code with automated tests against independently worked examples
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 19 ▼ −1 (down) since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 8 | 0 |
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| Citation Flow (Majestic) | 23 | 13 |
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| Referring domains (Majestic) | 53 | 1 |
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