| What it does | Electronics calculators for makers
| Snap a photo to check what something is worth based on current listings
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| Stage | Not given
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| Pricing model | Freemium
| Freemium
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| Pricing | Free: $0 forever. Pro Monthly: $4 per month, cancel anytime. Pro Lifetime: $29 one-time payment.
| Free: 1 scan per day on website, 3 scans total on iPhone app then 1 per week. Premium Weekly: $4.99 per week. Premium Yearly: $29.99 per year with 3-day free trial.
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| Key features | - 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
| - Photo identification using AI for brand, model and condition
- Real-time listings from Google Shopping and eBay
- Price range with confidence levels based on listing data
- Condition adjustment that updates price in real time
- Specialist catalogues for coins, banknotes and trading cards
- Live metal prices for gold and silver
- Up to three photos per scan for detailed matching
- Collection tracking to monitor item values over time
- Labeled rough estimates when live listings are insufficient
- Full transparency with access to actual live listings and photos
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| What makes it different | - 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
| - Uses current marketplace listings instead of AI training data or memory
- Shows confidence levels and actual proof you can verify yourself
- Filters out outlier listings to avoid inflated or deflated prices
- Covers specialized markets like coins and trading cards with expert sources
- Never invents numbers when data is insufficient
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 1 ▲ +1 (up) since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 0 | 0 |
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| Citation Flow (Majestic) | 0 | 0 |
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| Referring domains (Majestic) | 0 | 0 |
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