Digital Slide Rule 4.06.08
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Free Version
Publisher Description
Four different types of slide rules with dozens of scales plus working models of historic slides
The slide rule was used for over 400 years as a calculating/estimation tool. Abandoned with the advent of hand-held calculators, computers and smart phones, their elegant simplicity is still a thing of wonderment. This program replicates the most common types of slide rules: Straight, circular, spiral and cylindrical. Dozens of scales are included and numerous features that could never exist on a physical slide rule are also included, such as color options, numeric displays of the values under the hairlines, and so on.
Slide rules were used to go to the moon and to build bridges, skyscrapers, tunnels, aqueducts and nearly everything else. Slide rules were simple to use and accurate enough for most occasions.
Also, note that this program is processor-intensive and with heavy use, will probably drain your battery quickly. Every effort has been make the program efficient, but nevertheless, some functions take a few moments to occur, including initial load, which can take three or four seconds, or perhaps a little longer. Nearly 30,000 "nibs" are created during this time, as well as over 3,000 labels, so please be a little patient! Because of all the detail, it looks best and runs best on a large-format machine such as a tablet. Also because of all the detail, the 30-loop spiral slide rule converts to a low-rez "bitmap data image" while you move it, then back to a "vector based image" as soon as you release.
Includes a brief side show slide show of famous and interesting slide rules, most of which are in the author's collection. Two are public-domain photographs of antique slide rules.
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Notes on usage: Program features include "two-finger pinch/zoom." Slide rule slide show images can also be rotated. Enlarge an image by double-tapping in the same place. Tapping three times in the same place will return the program to the home position. Tapping four times will bring up an intro-screen message which requires tapping anywhere to remove.
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This program was first released in 2016 and is the product of a lifelong love of numbers (and 30+ years of programming experience!).
Special thanks to the Oughtred Society for their member's invaluable help in evaluating the earliest versions of this program.
Oct 30, 2017
Version 4.06.08
This app has been updated by Apple to display the Apple Watch app icon.
Faster setup time after program is loaded (as much as 50% faster); streamlined internal processing (especially of Cylindrical Slide Rule); corrected "Display Estimated Hairline Values" for several of the alternate scales.
About Digital Slide Rule
Digital Slide Rule is a free app for iOS published in the Kids list of apps, part of Education.
The company that develops Digital Slide Rule is Ace Hoffman. The latest version released by its developer is 4.06.08.
To install Digital Slide Rule on your iOS device, just click the green Continue To App button above to start the installation process. The app is listed on our website since 2017-10-30 and was downloaded 2 times. We have already checked if the download link is safe, however for your own protection we recommend that you scan the downloaded app with your antivirus. Your antivirus may detect the Digital Slide Rule as malware if the download link is broken.
How to install Digital Slide Rule on your iOS device:
- Click on the Continue To App button on our website. This will redirect you to the App Store.
- Once the Digital Slide Rule is shown in the iTunes listing of your iOS device, you can start its download and installation. Tap on the GET button to the right of the app to start downloading it.
- If you are not logged-in the iOS appstore app, you'll be prompted for your your Apple ID and/or password.
- After Digital Slide Rule is downloaded, you'll see an INSTALL button to the right. Tap on it to start the actual installation of the iOS app.
- Once installation is finished you can tap on the OPEN button to start it. Its icon will also be added to your device home screen.
