Offline writing software that keeps your manuscript private

Cloud writing tools sync every keystroke. That is fine for notes. For a novel or thesis, local-first keeps drafts private and usable on a plane, in a cabin, or anywhere bandwidth is unreliable.

PetroInk stays on your machine

• Manuscripts and project files live in folders you control
• Offline grammar tools run without sending text to a server
• The writing assistant uses a local model via llama.cpp
• Activation checks in once; day-to-day writing does not phone home