Factors Glow uses when telling to test?

Chelsey • 27, happy wife of 4 years and I love my job! Due 5/28/15 with #1!
I read that Glow tells us to test at 12DPO, is there anything else Glow considers? Like what if we didn't BD during fertile window? (We did, just wanting to know) What about bbt, CM, or cervical feel and position? Would Glow not tell you to test depending on those factors? Very curious, thank you!