All I can say that notification sounds are definitely being considered in our discussions, though I can’t give a promise if or when it happens.
We do think notifications are one of the most important ways users interact with Blink. We have been making notifications better and consistent through recent upgrades in terms of delivery and organization.
For example on Android we recently added notification bundling - You will see your motion clips bundled together per camera. Like it will say 5 clips from 3 cameras(Example). If you expand the notification, you will see a thumbnail image inside of the clip. @Julianp_at_Blink can explain more.
As for receiving notification consistently on devices, we have actively improved our backend and monitoring systems for getting better consistency rates.
All these things are non-UI changes and come under “Bug fixes and Improvements”