Semacheck

Semacheck is a task management software that allows users to organize items up to five levels deep, automatically ticking off parent items when all related tasks are completed. It prioritizes speed and convenience, enabling one-handed operation on mobiles and keyboard-first navigation on browsers.

Users can import lists from documents, synchronize data across devices via Google sign-in, and access offline functionality on mobiles. They also retain full data ownership and can export checklists in a standard format. Semacheck is free, ad-free, doesn't track user activity, and is a hobby project.