Kin

Kin approaches habit building with a behavioral science-based angle: instead of relying on willpower alone, it helps you design habits that fit naturally into your existing routine.

Kin is a habit building and tracking app that integrates behavioral psychology principles into its system. Instead of simply asking you to check off a habit each day, Kin guides you through habit design: how to anchor it to something you already do (habit stacking), what time to schedule it, how to make it smaller and easier in the first weeks. The tracking system records consecutive day streaks, completion statistics and progress over time, with visualizations that make the work done tangible. The app includes customizable reminders, guided reflections to understand what blocks habits you can't maintain, and a check-in system to help evaluate your week. The differentiating point from other habit trackers is the emphasis on the habit design phase, not just its tracking, and the inclusion of educational content on behavioral psychology.

For those who want to build lasting habits with a scientific approach, not just keep a daily checklist, and are interested in behavioral psychology.

Kin is available for free with basic habit tracking and design features. Premium features are available that unlock additional content, advanced reflections and more detailed statistics. Updated premium plan terms should be verified directly on the app.