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Terra Rater

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Don't be an Earth Hater, use Terra Rater!

Terra Rater (TR) is an app that employs the sensors in your Android device to periodically collect data along with a location and time of measurement.  When aggregated with other users' measurements across Earth, this data can be used for scientific modeling and/or visualization.

TR does not collect any data about the user.  TR takes measurements four times per day and the energy used is miniscule.

TR is currently a work in progress - for now, only magnetic field detection is enabled.  Other sensors in the list are greyed-out but may be enabled in a future update.

If you are interested in using this data for a science project or would like to develop a similar, custom app, please don't hesitate to contact me at  Thanks for using Terra Rater!

iPhone related for Terra Rater

Terra Rater was developed for Android by Ernest G Freund

Package name : org.egf.terrarater

System permissions : 6 Click here to show/hide list
  • android.permission.ACCESS_FINE_LOCATION
  • android.permission.SET_ALARM
  • android.permission.INTERNET
  • android.permission.WRITE_EXTERNAL_STORAGE
  • android.permission.READ_PHONE_STATE
  • android.permission.READ_EXTERNAL_STORAGE

I am the developer of this Application !

Discussion(s) about Terra Rater in our forum

Comments and Ratings for Terra Rater

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by A Google User the 10/15/2011

Love the fact I'm contributing to the progress of science, are there any other apps like this out there?

by A Google User the 9/6/2011

It's nice to know that I'm contributing to scientific measurement. 5 stars!

Terra Rater for Android was rated by Android Market Users on : 5.0/5


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