I am a parent but don't currently have a need for this. Looking at your site I would currently not subscribe if I did have a need. It's unclear how much processing will be done on device and how much will be done in the cloud. It's also unclear what data retention policies you have. I don't want to read the privacy policy to figure this out. I'd expect an explanation on the overview of what data will be stored, how long, and how it will be managed since this will involve recordings of my child. I also think a third party audit of your code and privacy practices would be helpful, but I understand this isn't something you may want to do initially while the app is changing significantly in early development.