iSlideRuleHD

This is a wonderful introduction into what a slide rue can do and it is a great way to have one with you without the risk of it being damaged. Slide rules are not cheap today, as if the really ever were. Carrying one about can be a risk. Mine are very important to me. I do not want anything to happen to them so having one in the iPad is a significant boon. No it isn’t perfect, but then, it’s FREE!

This is a beautifully done app, very professional looking. It basically allows you to transfer almost any combination of slide rules to the iPad, from the simplest ones to the most complicated log-log rules as well as to invent your own unique rules. the interface is very simple and elegant and is actually even easier to use than a physical slide rule. it looks stunning on the retina display. About the only feature I would like to see added is the ability to remember the slide rule state (cursor and slide positions) when reopening the app. Kudos to the developer. I have seen many slide rule apps over the years and none even approaches the look and utility of this one. it allows you to do things that would be cumbersome to program on a calculator and the displaying of the decimal values alongside the cursor makes it very practical for real-world calculations.

I have most of the slide rule apps. This one has much to recommend it. The size makes it easy to see and enhances the accuracy. I also like the numeric readings at the hairline. It is fully customizable to match most rules out there and it seems accurate. The problem is the slide is independent of the body. I move the slide to where I want it, then move the body and the slide doesn't go with it! You have to move the cursor to keep the slide in position. It's just not natural. When the body is moved, the slide must move with it. Period. Fix that and I'll give it five stars.

This is a great product for those who love slide rules and the slide rule's ability to enhance the learning process for mathematics. The ability to customize so many different (70+) scales in groups of five is very impressive. The attention to detail for the gage points (key constants such as pi, e, unit conversions, etc.) shows a deep appreciation for the art.

Stop being lazy, and learn how to visualize numbers with a slide rule!