I loved the amazing functionality of this app. Virtually every calculation can be accomplished with the high accuracy and precision of the scales provided. However, I have noticed an error in the markings on the left side of LL2. Although the tick marks for 1.11 and 1.2 are placed correctly, the tick marks in between and the label of 1.15 are inaccurately placed. Other than this caveat, the slide rule is amazing as well as visually pleasing. The simple design with a well-thought-out color palette make the app pleasing to the eye. Additionally, the zooming and locate cursor functions make the app more accessible and ergonomic. I would highly recommend this app, but please fix the tick mark placement on LL2.

This is a great app! Not a fault I can find. No ads! The rule is gorgeous and, unlike actual slide rules, very easy for me to see. You can even zoom in. My son is getting married today and I was trying to figure out last night during set-up if we had enough places sat for guests expected. I opened up the calculator app on my phone then thought “wait! I’ll use my slide rule app!”

It’s cleverly designed so you can actually use it from your phone. It includes integrated tutorials which actually teach you how to use a slide rule. Haven’t found any other SOS which do the same. Is great!

This app implements a slide rule very well and its usability is excellent. Zoom and reversals are intuitive and pleasant to use.The scale arrangement (especially the LL scales) are a bit unusual, but this is secondary to demonstrating the principles of the slide rule.