What day do you start testing?

Jen • Mom to one very cute little boy conceived with the help of Glow! Avoiding baby #2 for a few years
Last month I just waited for my AF to show and didn't test. I kinda thought I would always just test if my AF ended up late or didn't show. But this month I am curious. I read that DPO11 is kinda the standard. If I am to believe my dr I am DPO11 today... Although glow thinks I am DPO6 based on my BBT. When do you ladies start testing?