Circular Slide Ruler

v1.1.1

Matteo Bertini

4.40

98 reviews

10,000+
Downloads

Free

Align the inner and outer rules and find on the circle all the multiples.

4.40 · 98 reviews · 10,000+ downloads

About Circular Slide Ruler

Circular Slide Ruler is a tools app developed by Matteo Bertini.

How many times has Circular Slide Ruler been downloaded?

Circular Slide Ruler has been downloaded 11 thousand times. In the last 30 days, the app was downloaded 0 times.

What is the rating of Circular Slide Ruler?

Circular Slide Ruler is rated 4.40 out of 5 stars, based on 98 ratings.

Is Circular Slide Ruler free?

Circular Slide Ruler is free to download. The APK download size is 56.59 kB. The latest version available is v1.1.1. The last update was on April 3, 2014.

What are the requirements for Circular Slide Ruler?

Circular Slide Ruler requires Android 2.1+ or higher. The app has a content rating of Everyone. The app has been available on Google Play July 2013.

Description

Once all the pilots had a rule of this kind on the clock, knowing how to do multiplication and division quickly could save your life.

Alternative downloads for the Circular Slide Ruler app

Circular Slide Ruler compared with similar apps

Common keywords of similar apps

Multiples Rule Euros Dollars Costs Https Ruler Quickly

Keywords missing from this app

Calculator App Calculations Simple Screen Math Recent Measure Currency Tool Easy Basic User Free Addition Calculation Functions Subtraction Tip Converter Check Multiplication Division Units Unit Time Interface Support Real Length Features Margin Price Calculate Advanced Friendly Ads Mode Save Measuring Shopping Makes Create Supports Accurate Inches Centimeters Inch

Google Play Rating history and histogram

Downloads over time

Circular Slide Ruler has been downloaded 11 thousand times. Over the past 30 days, it has been downloaded 0 times.

Changelog of Circular Slide Ruler

Show changelog

Developer information for Matteo Bertini

Matteo Bertini

matteo@naufraghi.net

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Comments on Circular Slide Ruler for Android

★★★★★ Mark Lammas · Oct 30, 2025

This is very intuitive, and easy to use. The lack of complex graphics means that the screen motion is smooth with no lag. This goes into my regular set of favorite slide rules which I use often. There is space on the rule for further graduations among the early numbers; line length will be sufficient to highlight them as appropriate. With sufficient useful graduations visible, this will make a VERY high resolution slide rule when used on a large tablet. Dragging outside the circle is superb!

★★★★★ A Google User · Aug 7, 2013

Simple and useful. Does what you would expect. Circular slide rule for multiplication and division. Inner wheel is fixed. You turn the outer wheel. Two digit precision. Use for quick unit conversion (miles/km, pounds/kg), currency conversion, price discounts, DSLR focal length crop ratio. Remembers the ruler position even if you restart your phone. Search YouTube for aviation watch converting currency, for a tutorial.

★☆☆☆☆ Elliot Jenner · Jul 21, 2017

What scale is this supposed to be? If it's multiplication there is a problem, because the outer and inner don't line up correctly (ex. 10*20 gives 500, not 200). Also, why start at 10 instead of one as on most physical slide rules (obviously it's just decimal shifting but why bother)?

★★☆☆☆ Robert Bartusiak · Sep 25, 2015

Any guide available? How to use this thing? The fact that creators of this app know it does not mean that everyone else was born with this knowledge.

Google Play Rankings for Circular Slide Ruler

This app is not ranked

Technologies used by Circular Slide Ruler

Circular Slide Ruler is requesting 0 permissions and is using 0 libraries.

Permissions

No permissions found

No known libraries used.

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More apps

Price	Free to download
Total downloads	11 thousand
Recent downloads	0
Rating	4.40 based on 98 ratings
Ranking	Not ranked
Version	v1.1.1
APK size	56.6 KB
Number of libraries	0
Designed for Android	2.1+
Suitable for	Everyone
Ads	NO ads