I looked at https://de.pinout.xyz/pinout/skywriter_hat and http://de.pinout.xyz/pinout/voice_hat . Both need pin 11 and 13. Is there any way I can use both at the same time. Can I redirect the skywriter hat to some other pins?
Yes, but you’d need to re-wire the pins physically and then alter the Skywriter HAT library and change these two lines to reflect your new pin choices: https://github.com/pimoroni/skywriter-hat/blob/master/library/skywriter.py#L22-L23