Silly question

This may be a silly question so don’t judge lol just say yes or no but is there an app I can download to hear my babies heartbeat? Ugh I haven’t heard it since 7 weeks and I’m currently 11 weeks and I don’t go see my OB until the 9th and I’m so anxious to know it’s still alive. I’ve been reading so many stories of women going in to get a ultrasound only to see that they baby heart stopped and they stopped growing. That’s so scary to me and it makes me a little anxious. Plus I stopped having symptoms. The only symptoms I have is obsessive saliva and I’m hungry a lot more but I don’t feel nauseous or anything else like I did before.