# iSlipstick RF

> RF and electrical engineering calculators and converters for professionals. (iPhone/iPad app by Sam Virgillo.)

- Source: https://appshunter.io/ios/app/islipstick-rf/id351775311 (this page in markdown: same URL + `.md`)
- Developer: [Sam Virgillo](https://appshunter.io/developer/324560825)
- Category: Productivity, Business
- Price: Free (on sale, was $1.99)
- Rating: 4.70/5 from 3 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.6 · 43 MB
- Languages: American English
- Released: 2010-01-28
- Data updated: 2026-08-12
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/islipstick-rf/id351775311/reviews.md

## What is iSlipstick RF?

iSlipstick RF

iSlipstick RF contains all of the functionality of the standard iSlipstick plus many functions specifically for RF work.

RF Calculators included with iSlipstick RF are:

PATH LOSS – Enter all of the RF link parameters such as transmitter output power, antenna gain, cable loss, distance and frequency to find the actual RF level at the receiver.

MICROWAVE DISH BEAMWIDTH & GAIN – Enter the dish size, frequency and efficiency to find the 3 dB beamwidth and antenna gain.

WAVELENGTH – Metric & U.S.

RETURN LOSS / VSWR – Enter forward and reflected power to find VSWR, reflection coefficient and return loss.

FRESNEL ZONE – Enter link distance, obstacle distance and frequency to find the 60% and 80% zone radii.  This calculator also provides a visual display of ground clearance.

VELOCITY FACTOR (VOP) – Enter the dielectric constant of a coax to find the Velocity of Propagation and enter the cable length to find the propagation delay.  This calculator can also find the necessary cable length for a given delay and VOP.

INTERMODULATION – Enter up to six frequencies to find the 2nd, 3rd, 5th and 7th intermod products that can be created.  A 'hit' window can be set to eliminate out of band results.

I.F. FREQUENCY – Enter the incoming carrier frequency and 1st local oscillator frequency to find the resulting I.F. and whether the spectrum is inverted or normal.  This is a great calculator when working with up/down converters.

INTERCEPT POINT – Once you have determined the levels of fundamental and intermodulation tones in a system, you can enter those values into this calculator to find either IP2 or IP3.


Standard Calculators included in iSlipstick RF are:

OHM'S LAW – Find voltage, current, resistance and power.

REACTANCE – Find inductive and capacitive reactance by entering frequency and capacitance or inductance.

RESONANCE – Find the resonant frequency of an inductor – capacitor pair.

VOLTAGE DIVIDER – Enter the voltage into a resistor divider network to find the output voltage.

PARALLEL RESISTOR – Enter up to six resistor values to find the resultant parallel resistance.

SERIES and PARALLEL RLC – Enter R, C and L of a series or parallel circuit to find the impedance and phase angle.

OP-AMP – Find the gain of either an inverting or non-inverting op-amp circuit.

TIME CONSTANT - Find the first 5 time constants of both RC and RL circuits. 


Standard Converters included in iSlipstick RF are:

RESISTOR COLOR CODE – Enter a resistor value to find the color code or enter the color code to find the resistor value.

SMD RESISTOR – Enter 3 digit or 4 digit SMD codes to find the resistance value.
Also does EIA-96 conversion. 

VOLTAGE CONVERTER – Convert between RMS, average, peak and p-p values.

dB CONVERTER – Convert dBm, dBV, dBW and dBuV to absolute values and vice-versa in 50, 75 and 600 ohm load.

TEMPERATURE – Convert between four popular scales.

PERIOD – FREQUENCY – Convert waveform period to frequency and vice-versa.

LENGTH, AREA, VOLUME, CAPACITY and WEIGHT – Convert from metric to U.S. and vice-versa.  Also convert within same standard.


A help page is also available as a quick function guide.

Tested with iOS 12.0 thru iOS 15.1

## Key features

- RF-specific calculators
- Standard electrical calculators
- Unit converters
- Path loss calculation
- Intermodulation analysis
- Antenna gain and beamwidth

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/islipstick-rf/id351775311/reviews.md

### 5/5 — Great app for any RF engineer

*2012-04-25*

This is one of the most useful apps I have on my Ipad!  If you are in the broadcast engineering business, this will be an indispensible app for you!

## Frequently asked questions about iSlipstick RF

### What RF calculators are included in iSlipstick RF?

iSlipstick RF features calculators for Path Loss, Microwave Dish Beamwidth & Gain, Wavelength, Return Loss / VSWR, Fresnel Zone, Velocity Factor (VOP), Intermodulation, I.F. Frequency, and Intercept Point.

### Does iSlipstick RF offer standard electrical calculations?

Yes, in addition to RF tools, iSlipstick RF includes standard calculators for Ohm's Law, Reactance, Resonance, Voltage Divider, Parallel Resistor, Series and Parallel RLC, Op-Amp, and Time Constant.

### What types of unit conversions does iSlipstick RF support?

The app provides converters for Resistor Color Code, SMD Resistor, Voltage (RMS, average, peak), dB (dBm, dBV, dBW, dBuV), Temperature, and Period/Frequency.

### Is iSlipstick RF available on multiple platforms?

Based on the provided data, iSlipstick RF is currently supported on iPhone devices.

### How often is iSlipstick RF updated?

The application was last updated on January 29, 2025, indicating recent development and support.

### What is the user rating for iSlipstick RF?

iSlipstick RF has a strong user rating of 4.7 stars from 3 ratings, suggesting positive user experiences.

### Does iSlipstick RF have ads?

No, iSlipstick RF does not contain advertisements, as indicated by the 'hasAds' flag being false.

### What is the age rating for iSlipstick RF?

The app has an age rating of 4+, making it suitable for a wide range of users.

## Version history (last 5 releases)

### 1.6.3 — 2025-01-29

Updated graphics for larger screens.

### 1.6.2 — 2021-12-02

Fixed iPad icons

### 1.6.1 — 2021-11-13

Updated for latest iOS.  Fixed some graphic errors.

### 1.6.0 — 2020-04-27

Improved graphics and dark mode.  Fixed some bugs.

### 1.5.4 — 2020-01-29

Improved display when in Dark Mode

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## More apps by Sam Virgillo

- [iSlipstick](https://appshunter.io/ios/app/islipstick/id324560822)
- [Electrician's Helper](https://appshunter.io/ios/app/electricians-helper/id339910500)

All apps by Sam Virgillo: https://appshunter.io/developer/324560825

## Related topics

[islipstick rf](https://appshunter.io/ios/topics/islipstick-rf) · [islipstick](https://appshunter.io/ios/topics/islipstick)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-12.*