A free app for Android, by Dirk Farin.
ImageMeter is the easiest way to take pictures of anything and make it measured with a simple tap. Just hold your device to the object and snap a picture.
If you want to have a professional-looking image, use advanced drawing tools to draw the measurements on it.
The image will be automatically converted to the appropriate format and measurement units for your device.
The measurement units are metric (cm, mm, inch, ft, and nmi) and metric and imperial (mm, inch, cm, fts, and nmi).
This makes it very convenient to use for taking pictures of anything.
It is also very easy to use and intuitive.
It is compatible with the latest Android devices and works on tablets as well.