I use a pen and paper. Moleskin notebook and a Coptic multiliner 0.5. I also bought a pen loupe to keep the pen with the notebook . The multi liner drys so fast

I use a pen and paper. Moleskin notebook and a Coptic multiliner 0.5. I also bought a pen loupe to keep the pen with the notebook . The multi liner drys so fast that I can never get a smudge. For electronic notes I use the notes app from Apple.