Planimeter is a tool for all kinds of measurements on Google Maps. Regularly updated with new unique or requested features.

Google Play: https://goo.gl/1YQ6Do

More about the app: https://goo.gl/S2MQK2

FeetMeter is quick and simple way to measure both feet length and check your shoe size by taking measurements from a picture.

UPDATE: Android early version is available now:

https://play.google.com/store/apps/details?id=com.vistechprojects.shoe_size_meter

Pupil Distance Meter is accurate Android solution for pupillary distance (PD) measurement with camera.

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Telemeter is a tool for quick distance and height measurement using device camera and sensors. You can also check height of your camera from known size object on the bottom surface in Calibration-Mode.

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Tool for accurate pupillary distance measurement using device camera, a standard size card (gift, store, credit, id, etc) and a vertical mirror. The app is intuitive and guides you from taking a picture to accurate PD result step-by-step. Just follow the instructions thoroughly and you will get accurate PD from one measurement.