RF vs InductorCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RF
This app provides over 90 specialized tools for high-frequency electronics, catering to RF professionals, radio amateurs, and students. It offers calculations for PCB traces, filters, impedance, and more, with ongoing updates and new features planned.
- PCB Trace Width and Impedance
- LC/L/T/Pi Match Calculation
- Coax Cable Calculations
- Amplifier and Attenuator Cascade
- SWR/Reflection/Return Loss Conversion
- Filter Design (Butterworth, Chebyshev)
- RF Units Conversion
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Specialized on high frequency electronics for RF professionals, radio amateurs and students. RF-Toolbox is based on the popular Electronic Toolbox by Marcus Roskosch. This app contains some of the common tools of Electronic Toolbox but contains a wide range of additional tools, specialized for high frequency electronics, RF professionals, radio amateurs and students. Currently RF-Toolbox consists of more than 90 tools and like Electronic Toolbox, there are more to come over the time. Feature list: ■ PCB Trace Width (Internal and external Traces) ■ PCB Trace Resistance ■ PCB Trace Impedance (various trace types e.g. Microstrip, embedded Microstrip, Symmetric and Asymetric Stripline, Wire Microchip, Wire Stripline, Edge Coupled Microstrip and Stripline) PCB Crosstalk (Microstrip and Stripline) ■ LC L/T/Pi Match calculation ■ Coax Cable calculation (Standard and individual Types) ■ Amplifier and Attenuator cascade calculation ■ SWR / Reflection / Return loss conversion ■ Power Divider (Branchline, Ratrace and Wilkinson) ■ Capacitor Plate calculation ■ RLC Parallel, Series and Circuit calculation ■ Noise Figure conversion ■ Skin Depth calculation (various materials from Aluminum to Silver) ■ Butterworth Filter (also with plot of filter chart) ■ Chebyshev Filter (also with plot of filter chart) ■ R-C, L-C, R-L High/Low/Band-Pass Filter ■ RF Units conversion (quick conversion of frequently used units) ■ Air coil inductance calculation ■ Resistors, Capacitors, Inductors in Parallel / Series And there is much more... ■ Aktive Filter calculation tool ■ Antenna calculation tool ■ Delta Star calculation ■ Cable length / ampacity tool ■ PTC / NTC Temperature Resistance conversion ■ AC Ohms law tool ■ Zener diode circuit calculation ■ Constant current source tool ■ ASCII Table ■ Desktop calculator ■ Resistor/Capacitor/Inductor combinations tool ■ 4-20mA conversion tool ■ Passive cooling calculator ■ Audio Oscilloscope Please check out more screen shots on my website (WEBSITE Link on the left side). If you have questions, please feel free to contact me by using the Support button here, inside the App or on my website. Thank you! Marcus Roskosch
InductorCalc
Calculate essential parameters for custom inductors and coils. Input dimensions like turns, length, and diameter to instantly get inductance, Q-factor, wire length, and DC resistance. Ideal for electronics enthusiasts and students designing custom components.
- Calculate inductance (L)
- Calculate Q-factor at operating frequency
- Calculate total wire length
- Calculate DC resistance
- Supports multiple SI units
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Designing your own inductor or coil? InductorCalc makes it quick and easy to get the key parameters you need. Enter your coil’s physical dimensions — number of turns, length, and diameter — and instantly calculate: • Inductance (L) in a range of SI units • Q-factor at your chosen operating frequency • Total wire length needed for the winding • DC resistance based on your wire’s Ω/m value Simply fill in the fields, tap Calculate, and let the app do the math. Perfect for electronics hobbyists, students, and anyone building custom inductors.
Screenshots
Verdict
The clearest difference is price: InductorCalc at $0.99 against RF's $7.99. InductorCalc also leads on review sentiment (100% vs 91%). RF's advantage is update cadence (every 4 months vs every 23 months). On ads, in-app purchases, monetization model and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
RF costs $7.99 and InductorCalc $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
RF ships an update every 4 months, InductorCalc every 23 months. The most recent releases landed on September 22, 2026 and June 1, 2026 respectively.
| Parameter | RF | InductorCalc |
|---|---|---|
| Price | $7.99 | $0.99 — better |
| Rating | 4.9 (22 ratings) — better | — |
| Positive reviews | 91.1% of reviews | 100.0% of reviews — better |
| Number of ratings | 22 — better | — |
| Update frequency | Every 4 months — better | Every 23 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.1 — better | 12.0 |
| Further details — not scored | ||
| Size | 92 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | Marcus Roskosch | oskari saarinen |
Customer experience
RF
InductorCalc
In-app purchases
RF
No in-app purchases
InductorCalc
No in-app purchases









