This camera app has a feature of pedometer.
Taking a picture with this app, step count at that time is written to the picture.
Also you can tweet the picture with step count.
Using with PictMap iPhone app, you can also view pictures of a day on a map.
I recommend you to use this app when you take a picture in your walking.
This app is for device with M8 like iPhone 6.
This app uses open-iconic under MIT license and material design icons under CC BY 4.0.
https://github.com/iconic/open-iconic
https://github.com/google/material-design-icons