QR-Time.com

Take a picture of the QR-code on your phone screen showing current time with your DSLR and use the photo to calculate time difference between camera and phone GPS when geotagging photos.

Time time reference images are supported by development version of gpicsync software: http://code.google.com/p/gpicsync/

Tags: qr time android, qrtime, www.qrtime.com.