# iSlipstick

> Electronic formula calculators and unit converters for engineers and hobbyists. (iPhone/iPad app by Sam Virgillo.)

- Source: https://appshunter.io/ios/app/islipstick/id324560822 (this page in markdown: same URL + `.md`)
- Developer: [Sam Virgillo](https://appshunter.io/developer/324560825)
- Category: Productivity, Business
- Price: Free
- Rating: 5.00/5 from 3 App Store ratings · 10 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 36 MB
- Languages: American English
- Released: 2009-07-30
- Data updated: 2026-08-12
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/islipstick/id324560822/reviews.md

## What is iSlipstick?

iSlipstick is a collection of commonly used electronic formula calculators and value converters.

Included:

Ohm's law calculator

Op-Amp gain calculator

LC circuit resonate frequency calculator

Impedance and phase calculator for both series and parallel RLC circuits

Parallel resistance calculator for up to six resistors

dBm to voltage and power calculator for 50, 75 and 600 ohm loads

Convert dBV to volts, dBW to watts and dBuV to microvolts with the dB converter.  This converter will also convert the respective value to dB

Resistor Calculator for 4 or 5 band resistors and SMD types

Time Constant calculator for R - C and R - L networks.

Length, Area, Volume, Capacity and Weight converters to go to and from metric and imperial units and within the same standard.

Voltage Converter RMS to Peak and Peak-to-Peak and vice-versa.


Features:

iSlipstick's unique keyboard makes it easy to enter values without having to jump from one keyboard mode to another

Numeric input can be American or European standard

Re-orderable tables allow you to put the most frequently used functions where you will find them quickly

iSlipstick has been tested on iOS 12.0 thru iOS 15.1

## Key features

- Ohm's law calculator
- Op-Amp gain calculator
- LC circuit resonance calculator
- RLC circuit impedance calculator
- dBm to voltage/power converter
- Resistor calculator
- Unit converters (metric/imperial)

## Recent user reviews (10 of 10)

All indexed reviews: https://appshunter.io/ios/app/islipstick/id324560822/reviews.md

### 5/5 — Nice application no ads!

*2024-02-24*

Awesome! Thank you to the Developer! Great app!

### 5/5 — IOS9 Does not work

*2015-09-18*

I upgraded to IOS9 and now the program closes when you open it. Please get a fix soon!!!

### 5/5 — Wow Great app.

*2015-02-27*

This app seems very legit, as a Eet major at my local community college. This will help out a lot as we're currently covering RLC circuits.

### 5/5 — Awesome

*2011-03-12*

This is the first time I have felt compelled to rate an app. This is absolutely the best!

### 5/5 — Great work guys! Very useful app.

*2010-07-28, version 0*

Updating my update!! The latest released has fixed all 3.1.3 issues. Great work guys. Super fast response. 

Update 21st July 2010 - after deleting and reinstalling this update, it now launches on OS3.1.3 but it crashes as soon as I try to enter any values in any of the calculations. 

Update 19th July 2010 - This update of this has completely broken compatibility on my 3G with OS 3.1.3. It won't even launch now. I have deleted the app, redownloaded AND hard reset my iPhone to no avail. I have NO plans to run iOS4 on my 3G because FAR too many people are reporting responsiveness issues. 
Please fix OS 3.1.3 compatibility guys.

### 3/5 — The Best

*2010-03-05*

The best ohms law calculator out, plus many more converters!

### 5/5 — great!

*2010-02-14*

its a great app for electronics enthusiasts and the occasional mad scientist. if you do anything with electronics, then this app is worth the 2 dollars. dont know what is up with the picture of the stopwatch, though, cuz it does nothing

### 5/5 — Well worth it

*2010-01-31*

Nice app, calculations are very clean.

### 5/5 — Mr

*2009-11-09, version 0*

This is the most comprehensive app produced so far for helping with my electronics formula's.

### 5/5 — You get your moneys worth.

*2009-08-01*

14 different electronic calculators and converters. It's quite a lot of useful stuff.

## Frequently asked questions about iSlipstick

### What types of electronic formulas can iSlipstick calculate?

iSlipstick includes calculators for Ohm's law, Op-Amp gain, LC circuits, RLC circuits (series and parallel), parallel resistance, dBm to voltage/power, dB converters, resistor values (4/5 band and SMD), and time constants for RC/RL networks.

### Does iSlipstick support both American and European number input standards?

Yes, iSlipstick supports both American and European standards for numeric input, making it adaptable for users worldwide. This ensures ease of use regardless of regional conventions.

### Can I customize the order of calculators in iSlipstick?

Yes, iSlipstick features re-orderable tables, allowing you to arrange the most frequently used functions for quick access. This personalization enhances efficiency for your workflow.

### What devices is iSlipstick compatible with?

iSlipstick is designed for iOS devices, specifically iPhones and iPods. It has been tested on iOS versions from 12.0 through 15.1.

### How often is iSlipstick updated?

The latest version of iSlipstick is 1.6.1, last updated on December 18, 2021. While updates are not frequent, the app has a history of stability across various iOS versions.

### What is the user rating for iSlipstick?

iSlipstick boasts an excellent rating of 5.0 stars, based on 3 user reviews. This indicates a high level of user satisfaction with the app's functionality and performance.

### Does iSlipstick have ads?

No, iSlipstick is ad-free. Users can enjoy all its features without any interruptions from advertisements.

### Is iSlipstick suitable for beginners in electronics?

Yes, iSlipstick is very suitable for beginners. Its straightforward interface and clear calculators for fundamental formulas like Ohm's law make it an excellent tool for learning and practicing basic electronics.

## Version history (last 5 releases)

### 1.6.1 — 2021-12-18

Updated for iOS 15.

### 1.6.0 — 2020-04-29

Improved code.  Improved dark mode. Fixed a few bugs.

### 1.5.5 — 2020-01-29

Improved display when in Dark Mode

### 1.5.4 — 2020-01-13

Updated graphics look for latest iOS.  Fixed minor bugs.

### 1.5.3 — 2018-06-13

Updated for larger displays and latest iOS

## Apps similar to iSlipstick

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [WE Catalog](https://appshunter.io/ios/app/we-catalog/id1439172334) | 5.0 (1) | Free | Productivity |
| [Vacuums](https://appshunter.io/ios/app/vacuums/id1241468166) | 4.0 (1) | Free | Productivity |
| [Metis OS - Tactical](https://appshunter.io/ios/app/metis-os-tactical/id6581486072) | — | Free | Productivity |
| [Teamtrics](https://appshunter.io/ios/app/teamtrics/id6502606034) | — | Free | Productivity |
| [Desired Resistance Calculator](https://appshunter.io/ios/app/desired-resistance-calculator/id1606169404) | — | $1.99 | Productivity |
| [HiOlink](https://appshunter.io/ios/app/hiolink/id6470041579) | — | Free | Productivity |

## More apps by Sam Virgillo

- [Electrician's Helper](https://appshunter.io/ios/app/electricians-helper/id339910500)
- [iSlipstick RF](https://appshunter.io/ios/app/islipstick-rf/id351775311)

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

## Related topics

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

---

*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.*