Show HN: Kadō – open-source habit tracker, with non-binary habit score, for iOS

Kadō is a new open-source habit tracker app for iPhone and iPad that prioritizes privacy. Unlike existing options, Kadō does not require an account or subscription, and there is no telemetry involved. The app follows three core commitments: it is MIT-licensed, uses native iOS code, and offers a non-binary habit score. This makes Kadō stand out from Loop, an Android-only open-source tracker, Streaks, a closed-source iOS option, and Teymia, a freemium iOS choice.

Kadō's development has focused on delivering a high-quality experience to the App Store, with version 1.7 currently available. The roadmap includes potential features like Live Activities and Dynamic Island for timer habits, along with polishing the v1.x release. The architecture of Kadō is detailed in CLAUDE.md, and the Makefile offers various targets, including App Store submissions.

Users can explore a hidden dev-mode toggle in Settings to experiment with historical score and streak behavior without impacting their actual data. All feedback is welcome, with issues and pull requests being accepted.