Not only are they sharp but the sparks props are carbon fiber! I had a blade give me a deep cut that bled a ton and cut through part of my fingernail. Had it not hit the fingernail, I'm thinking it would have been even worse!
I stopped using the DJI Go 4 app on Android and purchased the Litchi app! I will never go back! That app is worthless and I don't have to fuss around with an OTG cable because it works flawless with the wifi like DJI claims their app should function!