Please add this! I use GoodNotes to take notes in maths and this would make my life a hell of a lot easier. A ruler and protractor. If that's not possible then could you put a lock on the page? What I mean is a lock to stop the page moving while I'm trying to use a real protractor or ruler on the page and I accidentally hit the screen with my finger and it moves so I don't get the precise measurement I want.

Will be very helpful indeed

Agree to this! I have been having trouble drawing proper lines even with the help of the shape tools

+1 a ruler would be a huge benefit for this app

Please combine votes with other ruler suggestion. This is very popular.

And angles (protractor)

+1 for a good ruler :)

Duplicate of http://feedback.goodnotesapp.com/forums/191274-goodnotes-ideas/suggestions/9893523-ruler-similar-to-apple-notes-app-ios9

+1 for a ruler in GoodNotes. The app is one of my go-to apps on the iPad pro and a ruler would complete the functionality.

Would like to add to this feature, that the ruler should give me the ability to not only draw lines, but also measure and draw lines or calculate measurements between object and have a scalable ruler.

I like this idea. GoodNotesis already great and this features will be simple to implement.

A protractor or ruler would be greatly appreciated. This would be very useful for simple engineering sketches. I now use template A4 paper. It would be great that the ruler relates to the true template dimensions, or that you can somehow scale it to those dimensions.

Great idea.

I would add another idea - allow "Align to Grid" where the page template is the grid.

A ruler would be a really handy addition to this app. Currently if I want a straight line drawn where I want it, I actually use a real world wooden ruler. I tried using the shapes setting to give me a line but I can't align the line before I start/finish it, so a ruler makes more sense, is more accurate and is a once-only rather than multiple attempt solution. Thanks in advance for your consideration.

Yes a ruler is really a necessity and a protractor would be amazing.

A protractor is good, too

Please add a ruler like the existing one in Apple's Notes. For example drawing graphs the existing auto shape function isn't perfect for that.

A ruler in goodnotes would be awesome for me too! Please could you add it???

This would make GoodNotes nearly perfect.

This would be extremely helpful for using the graphing paper that they already gave us!! There's no point in graphing paper unless you can draw a straight line!