About Metamorphic

Metamorphic is a zero-knowledge habit tracker built for people who take their privacy — and their personal growth — seriously.

Every piece of data you enter is end-to-end encrypted before it ever leaves your device. We can't read your habits, reflections, or goals. Nobody can — except you.

We believe self-improvement tools should empower you, not surveil you. That's why Metamorphic is designed from the ground up with encryption at its core — not bolted on as an afterthought.

Metamorphic is built by Moss Piglet Corporation, PBC — a public benefit corporation committed to building technology that respects the people who use it.

Research foundations

Metamorphic's features are informed by decades of peer-reviewed research on habit formation, goal pursuit, motivation, and behavior change. Key studies that shaped our approach:

  • Habit formation (66-day curve) — Lally, P., van Jaarsveld, C. H. M., Potts, H. W. W., & Wardle, J. (2010). How are habits formed: Modelling habit formation in the real world. European Journal of Social Psychology, 40(6), 998–1009.
  • Implementation intentions (d=0.65) — Gollwitzer, P. M. (1999). Implementation intentions: Strong effects of simple plans. American Psychologist, 54(7), 493–503.
  • Mental contrasting (WOOP method) — Oettingen, G., & Gollwitzer, P. M. (2010). Strategies of setting and implementing goals: Mental contrasting and implementation intentions. In Social Psychological Foundations of Clinical Psychology (pp. 114–135).
  • Tiny habits & friction reduction — Fogg, B. J. (2009). A behavior model for persuasive design. Proceedings of the 4th International Conference on Persuasive Technology.
  • Self-determination theory — Deci, E. L., & Ryan, R. M. (2000). The "what" and "why" of goal pursuits: Human needs and the self-determination of behavior. Psychological Inquiry, 11(4), 227–268.
  • Habit-goal interface — Wood, W., & Neal, D. T. (2007). A new look at habits and the habit-goal interface. Psychological Review, 114(4), 843–863.
  • Emotion differentiation — Barrett, L. F., Gross, J., Christensen, T. C., & Benvenuto, M. (2001). Knowing what you're feeling and knowing what to do about it. Cognition & Emotion, 15(6), 713–724.
  • Expressive writing — Pennebaker, J. W. (1997). Writing about emotional experiences as a therapeutic process. Psychological Science, 8(3), 162–166.
  • Variable reward & dopamine — Schultz, W. (1997). Dopamine neurons and their role in reward mechanisms. Current Opinion in Neurobiology, 7(2), 191–197.
  • Goal setting theory — Locke, E. A., & Latham, G. P. (2002). Building a practically useful theory of goal setting and task motivation. American Psychologist, 57(9), 705–717.