You might want to share the issue you are running into, in the dedicated topic for the local Kasa app: [APP][Pro] TP-Link KASA LAN - Smart Plugs and Bulbs (WIFI).
You can also reach out to the developer via the contact details in the app store or via the linked topic.
It also helps if you could provide more details on the crashes and what troubleshooting steps you have already taken. Most community members and developers don’t have a crystal ball… 
