Ruler®

This app is ingenious, in particular the camera function. You place a credit card (or some other universal, standard object) on or near the object you wish to measure. The credit card provides a standard unit/scale upon which to base accurate measurements of the object you're measuring. You then take a photo of the credit card and object. Once the photo is taken, you plot a 'calibration line' along the edge of the credit card on the touch screen of your iPad or iPhone, which tells the app the scale of the dimensions in the pic. You can then plot as many measurement lines as you wish to measure any aspect of any object in the photo. Using this ingenious method you can achieve a level of accuracy which would be tricky to match using a conventional ruler/tape measure, especially when measuring large and/or awkward objects.

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The ruler app used to display centimetres as well as inches. Suddenly it wanted me to pay to upgrade to pro version of the app and be able to use centimetres. It was only 99p so I did upgrade. Yet the next time I came to use it again it won’t let me use centimetres and is again asking me to upgrade to the pro version.

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Been using this for years, it was always simple, neat and functional, but since the last update you can no longer show cm unless you pay to upgrade to pro version, it now measures inches only. I wish I could go back to the last version which was perfect, but since apple removed all the apps from itunes I no longer have an older version of the app to install. Avoid this app unless you only want inches or you want to pay money to upgrade.

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Completely a waste of time in my opinion. Easier to use a Tape Measure. You have to calibrate the tape measure using a coin, then draw lines to measure the object, then, you have to be at exactly 90 degrees of the ojeject, then you have to re-read the poorly written instruction and after all the you then have to delete the app, once you realise... far too complicated. Why create a tool that makes the job harder, makes no sense.

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I’ve had this app for years and use it all the time. Went to use it today... it had updated and taken away the metric measurements from the ruler leaving only inches!!!! I clicked a new button which looked like it would switch to metric and it asked for £0.99 pence to see a metric ruler. Very disappointed. Will be uninstalling