# Pocket Slide Rule Expert

> Digital slide rule simulator and educational tool for performing complex calculations. (iPhone/iPad app by TestTubeGames.)

- Source: https://appshunter.io/ios/app/pocket-slide-rule-expert/id434331277 (this page in markdown: same URL + `.md`)
- Developer: [TestTubeGames](https://appshunter.io/developer/421890276)
- Category: Education, Utilities
- Price: $0.99
- Rating: 4.80/5 from 4 App Store ratings · 6 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.0 · 16 MB
- Languages: American English
- Released: 2011-05-03
- Data updated: 2026-09-06
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/pocket-slide-rule-expert/id434331277/reviews.md

## What is Pocket Slide Rule Expert?

When it comes to nerd street cred, having a slide rule is not enough.  You need to know how to use it!

Hence, Pocket Slide Rule Expert.  This has the style of a classic rule, including great precision, but can also show you how to DO calculations.  Learn simply by watching auto-slide-rule mode.

Select from 19 different basic operations, including:
  
-Multiplication and Division
-Squares, Cubes, arbitrary powers
-Logarithms, both natural and base 10
-Trigonometric and reverse trig functions

Think you can't perform precise calculations using a touch screen?  Not at all!  Try the newly-added "brakes" button.  By holding it down, you can move the cursor and slider with extreme precision.

Are you a power user?  Then check out the 'Snaps.'  With the click of a button, quickly save a slider position -- and reuse it time and time again.  Multiply by the square root of 2 a lot?  Make a button for it!

Speed, accuracy, and a teacher right there with you.

## Key features

- Classic slide rule simulation
- Auto-slide-rule demonstration mode
- Precise cursor and slider control
- Save and reuse slider positions ('Snaps')
- 19 basic operations supported
- Multiplication, division, powers, logs, trig functions

## Recent user reviews (6 of 6)

All indexed reviews: https://appshunter.io/ios/app/pocket-slide-rule-expert/id434331277/reviews.md

### 5/5 — Wonderful!

*2017-07-20*

Fun and easy to use. The "Wizard" feature makes it easy to learn how to use *any* slide rule. The "brakes" feature is REALLY nice and I use that feature more than I thought I would. Overall, I'm very pleased with this app. Great job!

### 5/5 — Great virtual slipstick.

*2016-03-10*

Superb App!  Has all of the functions I was hoping it would have--log, exp, trig.

### 5/5 — Mr.

*2014-03-10*

I've always missed using a slide rule. This app brings back good memories. It's accurate, easy to use, especially with a built in help wiz. I like the looks, ths speed & also the brakes. Clear graphics, easy to read, just a VERY NICE app to have on your phone to learn how things were done "Back in the day"! Thank you very much!! A++++

### 4/5 — Beautiful

*2013-11-19*

Versalog rule, lots of the best scales. Works smoothly. (Just noticed that swiping at the top moves the cursor quickly, even when it is offscreen. )

### 5/5 — Pocket Slide Rule Expert RULES!

*2012-08-01*

This is a great app for understanding how practical calculations were done back when America went to the Moon (1969).

Moving the body, cursor and slide is by touch. The Brakes button is awesome! Adjusting the rule precisely is easy with it. The slide rule has excellent clarity on iPhone 4.

Overall, Pocket Slide Rule Expert is a delight for older engineers & scientists who had to work with the real thing, as well as for anyone with nostalgia.

GET THIS APP! 👍

### 2/5 — Rechenschieber

*2011-05-21*

Ungenaue, ruckelnde Einstellungen. Als gestandener Techniker der mit echten Rechenschiebern gearbeitet hat: kein Vergleich. Trotzdem Idee ist gut..

## Frequently asked questions about Pocket Slide Rule Expert

### What operations can Pocket Slide Rule Expert perform?

Pocket Slide Rule Expert supports 19 basic operations, including multiplication, division, squares, cubes, arbitrary powers, natural and base 10 logarithms, and trigonometric functions.

### How does Pocket Slide Rule Expert help users learn?

The app features an 'auto-slide-rule' mode that visually demonstrates how to perform calculations. This allows users to learn simply by watching the operations unfold.

### Is Pocket Slide Rule Expert suitable for precise calculations on a touch screen?

Yes, the app includes a 'brakes' button. Holding this down allows for extremely precise movement of the cursor and slider, overcoming potential touch screen inaccuracies.

### What is the 'Snaps' feature in Pocket Slide Rule Expert?

The 'Snaps' feature allows power users to quickly save a specific slider position with a single click. These saved positions can then be reused repeatedly for frequent calculations.

### What is the price of Pocket Slide Rule Expert?

Pocket Slide Rule Expert is a paid application, available for $0.99.

### What devices is Pocket Slide Rule Expert compatible with?

Pocket Slide Rule Expert is designed for iPhone and iPod devices.

### How often is Pocket Slide Rule Expert updated?

The latest version, 1.9, was released on April 14, 2017. The app was originally released on May 3, 2011.

### Does Pocket Slide Rule Expert have ads?

No, Pocket Slide Rule Expert does not contain advertisements.

## Version history (last 5 releases)

### 1.9 — 2017-04-14

This update from Apple will improve the functionality of this app. No new features are included.

-Bug Fixes

### 1.8 — 2015-04-23

-Fixed the bug of the disappearing scrollbars

### 1.7 — 2013-10-31

-Cursor sliding bug fixed

### 1.6 — 2013-09-23

-Fixed a bug in the calculations that affected iPhone 5

### 1.5 — 2013-05-18

-Save a slider position you use a lot, and snap to it with the click of a button
-Name the snaps to keep 'em straight

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All apps by TestTubeGames: https://appshunter.io/developer/421890276

## Related topics

[pocket slide rule expert](https://appshunter.io/ios/topics/pocket-slide-rule-expert) · [slide rule](https://appshunter.io/ios/topics/slide-rule)

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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 2026-09-06.*