Align the inner and outer rules and find on the circle all the multiples.
Not recently updated — last update was on 2014-04-03.
This app may no longer be actively maintained.
About Circular Slide Ruler
Circular Slide Ruler is a tools app developed by Matteo Bertini.
Download Statistics
Circular Slide Ruler has been downloaded 11 thousand times. In the last 30 days, the app was downloaded 0 times.
User Ratings
Circular Slide Ruler is rated 4.40 out of 5 stars. The rating is based on 98 ratings.
App Information
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.
Technical Requirements
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.
Today planes rely on very different technologies but the rule is still useful whenever you want to do operations without having to type. Just line up the two numbers to get quickly tabs on all their multiples.
Very useful for travel, just set the exchange rate, for example, if 1 U.S. Dollar is worth 0.75 Euros, how many U.S. Dollars costs a 40 Euros backpack? Just look at the Ruler to see it costs about 53 U.S. Dollars, without doing math!
Join the Google+ Community Android Development https://plus.google.com/communities/105153134372062985968 and opt-in https://play.google.com/apps/testing/it.slug.circularsliderule to test new betas!
Recent changes: What's new:
- Orientation is now fixed - Optional dark theme - Use better the screen space (slightly bigger radius) - 10 is painted in swapped colors for better identification
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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
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Technologies used by Circular Slide Ruler
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