Do any of u guys have been using this app?
And can this help you to find the best way of waking up for WBTB or other techniques? And what is important in the statistics for those techniques?
Link: Link to vendor removed. 
Grtz
Do any of u guys have been using this app?
And can this help you to find the best way of waking up for WBTB or other techniques? And what is important in the statistics for those techniques?
Link: Link to vendor removed.
Grtz