Nice Toy, Poor Tool Clumsy, imprecise controls mar what might have been a better slide rule app. Graphics are very nice, have the feel of an old-school laminated wood slide rule. Even uses a reversible slide for trig functions (gets an extra star for that). But it's too jumpy for any degree of precision. Great for spitballing and ballpark figures, but not much use beyond that. Add some precision adjustment tools and this would be a contender with style and functionality.

Works... Wrote developer. Cd used better "help" & either label scales or indicate what type rule he's using. I rate 3 stars bc it at least works on my Galaxy Note 2 ,+ I add 1 star for developer effort. But cd use more clarification.

Great scale - but it jumps around when touched and doesn't slide smoothly. Could be great if this was fixed

Yuck on Samsung G4 Clumsy interface and rule won't stay put.

What kind of measurements are these?

Bad