A phone app to know when the ball bounced out?

Hey tennis friends,

We are building this phone app for amateur tennis players around the world. It is called the Line Call Tennis App. What are your thoughts? Would you use it?
Down the road the app would also give you serve speed and specific stats about your game. It could even keep score for you and sync to your smartwatch in case you have a doubt.

We understand simplicity of use and accuracy are super important and we will deliver that as our #1 priority.

Looking forward to getting a conversation started. We also have a survey we would humbly ask for fellow amateur tennis players to fill out, but I'm not sure we're allowed to a link to a google form on a forum post here.