Trackpa

Send location updates via SMS to another phone with the option of encryption

Using Trackpa you can:

-Track a location from another phone by sending sms to a given number

-Encrypt the sms that are being sent to avoid leaking your location.

-Use Trackpa Receiver (https://play.google.com/store/apps/details?id=com.vaslabs.trackpa_receiver) that generates encryption keys and visualises the locations that are being received.

It is recommended that you have a package with unlimited SMS messages to avoid high costs.

Source code is available at:

https://github.com/vaslabs/trackpa

How to:

http://blog.vaslabs.org/2016/01/trackpa-never-lose-your-grandparents.html