I didnt download it, but I would like to try as it supports BTC, ETH, and ERC-20
I assume that I have to online to gets the notifications which reduce the importance of this application.
Suggest you: make site/app that you can add your address and then get alerts via your email or social media "telegram or WhatsApp."
https://www.cryptotrendalert.com/ can do this. Browser based with email and push message notification.