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iSlideRule

iSlideRule

Fully customizable sliderule

6 ratings
21 reviews
📚 Education
🔧 Utilities

Archived App (Last seen on 1 Feb 2026)

This is an archived listing of the app previously available on the App Store.

Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.

Details

  • Released
  • Updated
  • October 10, 2008
  • April 14, 2022

Developer

Reid Performance Designs
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iSlideRule screenshot #1 for iPhone
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iSlideRule screenshot #5 for iPhone
⭐21
Reviews↘︎
🔄6+ apps
Alternatives↘︎
❓8 answered
FAQ↘︎
📦w/o updates
Updates frequency↘︎
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About

This app simulates a fully customizable sliderule, offering a wide range of mathematical functions and nearly 100 different scales. Users can select scales for various calculations, including dimensional analysis, and customize the appearance with multiple color schemes. It supports device rotation for optimal viewing.

✓Multiplication, sines, tangents, cosines, cotangents, roots, squares, logarithms, hyperbolics
✓Nearly 100 different scales, including dimensional analysis
✓Selectable scales for top, bottom rules, and slide
✓Dynamic color scheme customization
✓Supports device rotation
✓Index end viewing and cursor color change
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What's New in iSlideRule

3.1.2

April 14, 2022

Update to correct an issue when running on iPad

User reviews

Most RecentHighest RatedLowest Rated

Nice ideas, flawed usability

This app has flexible scale configs and lots of special tick marks but it feels neglected. It needs updates to be usable on iPhones since ca. 2020.
- Scale labels are obscured by the notch or dynamic island.
- In the default portrait orientation more than half the screen is left empty. Instead, a full-height view would be useful and constitute a mild zoom feature that is otherwise missing.
- Settings and Help buttons are clipped in landscape orientation.
- The ‘Help’ button links to a non-SSL web page which prompts a security alert (disputable as those are, they deter users). This is unexpected given the large download size of already above 20MB.
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sternutatorsternutator

To the developer: Could you…?

Hello there! I, like every person that has reviewed your app, love what you have done with it!

However, allow me to suggest an improvement: Would it be possible to move/alter both the Portrait and Landscape orientation implementations so that the Dynamic Island does not intrude with the display? That would make your app a 5+ star app.
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CirciterCirciter

Great tool

I too am a slide rule collector and student. This app is very customizable and intuitive. I can set it up to match many of my grandfather’s old slide rules. Also has a great description area. But what I love most is that this app does not track any of your information. Good job!!
Old School Pilot 2Old School Pilot 2

Very well made

Makes best use of screen. All seems to work as it should. I'm a slide rule collector, so nice to have good one on mobile device. The only iPhone slide rule app I know of which has trig scales. Well done!
a satisfied usera satisfied user

If you're “into” slide rules ...

This is the best out there. Math “purists” will love it.
flitetymflitetym
See 16 more reviews

Developer apps

iSlideRuleHD
iSlideRuleHD

Fully customizable sliderule

📚 Education

(2)

$0.99
See developer apps

FAQ

What mathematical functions does iSlideRule support?

iSlideRule supports a comprehensive set of functions including multiplication, sines, tangents, cosines, cotangents, roots, squares, logarithms, and hyperbolics, making it a versatile tool for various calculations.

How many scales are available in iSlideRule?

The app offers nearly 100 different scales, including specialized scales for dimensional analysis, allowing for a wide range of applications and calculations.

Can I customize the appearance of iSlideRule?

Yes, iSlideRule features 11 selectable color schemes that can be dynamically changed by swiping up or down on the cursor, allowing for personalized customization.

What devices is iSlideRule compatible with?

iSlideRule is designed for iPhone and iPod devices, supporting rotation to take full advantage of the display.

How does iSlideRule handle different groups of scales?

You can select scales for the top and bottom rules, as well as the slide, in groups of 4. Double-tapping each rule allows you to cycle through these groups.

What is the user sentiment for iSlideRule based on ratings?

Based on 6 ratings, iSlideRule has achieved a perfect 5.0-star rating, indicating very positive user sentiment and satisfaction with its functionality.

Does iSlideRule have ads?

No, iSlideRule does not contain advertisements, providing an uninterrupted user experience for its paid features.

When was iSlideRule last updated?

The latest version of iSlideRule, 3.1.2, was last updated on April 14, 2022, indicating ongoing support and maintenance.