Is there any Heart Rate app that uses red LED in S5 instead of flash (other than S Health)?

[AC Question]

I was wondering, is there any heart rate app that uses red light instead of flash?
S Health uses this red light, but all other heart rate apps that I found in Google Play use the flash.

I just want to save the flash lifetime, that's why I am looking for heart rate app that uses red light like S Health.

Thank you!