Download

curl -fsSL https://files.readine.app/public.key | sudo gpg --dearmor -o /usr/share/keyrings/readine-keyring.gpg

echo "deb [signed-by=/usr/share/keyrings/readine-keyring.gpg] https://updates.readine.app/Readine/b07bf07d5a99928751f07fb0752d9968/linux/debian/ binary/" | sudo tee /etc/apt/sources.list.d/readine.list

sudo apt-get update

sudo apt-get install readine