Camera measure: Partometer is a good, easy to use and handy app for object size measurements (length, width), for angles and area estimation. It can be used as a ruler, tape measure or planimeter. A must have tool for accurate measurements on pictures or photos or using camera of your device.

Modes:

Length-Mode - measure and divide an object in certain ratio or mark length on the object using ratio ruler (slider).
FreeHand-Mode - measure an object in any direction and compare sizes to each other.
Angle-Mode - measure length, area and angle on an object in any direction and compare sizes to each other.
Area-Mode - area calculator, measure area of different shapes
Circle-Mode - measurements on circular objects: radius, arc, sector, area, angle.

Partometer can be handful if:
- moving in and need to measure size of your room quickly
- buying furniture and want to estimate its size
- measure baggage size
- when buying glasses and need to measure Pupillary Distance (PD)
- measure fabric or cloth area and size
- measure trees
- need to measure out some distances on objects (handcraft, woodcraft, etc.)
- outdoor and want to know size of a big object that practically impossible to measure with a ruler or tape measure.

For example, you can measure:
- height of a house using sheet of paper as a reference object.
- small objects just by placing them on A4 or Letter sheet
- or compare height of a person
- or compare objects to each other
- use as pitch gauge
- spark plug gap
- bearings, roller bearings, nuts, rings.
- any internal feature or free, irregular shape area on X-ray if you have a reference, useful for dentists
The app has metric and imperial units: meters, centimeters, millimeters, inches, feet

Features: flashlight, autofocus, Save and Share results.

Depending on the distance to object with this camera measure app you can achieve sub mm resolution