Free forever for the tracking + the science. Pro adds two depth features.
peer-reviewed studies
69 habits scored
Monthly research updates
Or get monthly research drops.
No credit card
$5.00/month — save $59.89/year
Everything in Free, plus
Yes. Our habit database is curated from 70 peer-reviewed studies from PubMed, Nature, Stanford, and Max Planck Institute. Every habit has a Mechanism Card with pathway annotations (VTA→NAc, D1/D2 receptor dynamics, etc.), every assumption in its score is labelled, and every study is linked. All 69 Mechanism Cards — one for every habit in the catalog — are free for every user. Explore all the research on our education page.
Pro adds exactly two depth features on top of the free tier: (1) the 7-Day Counterfactual Simulator, which projects your receptor state forward and shows what happens if you drop any habit for a week; (2) the full 72-hour Dopamine Timeline with per-bar citation tap-through — tap any logged habit to jump to its peer-reviewed source. Everything else — unlimited habit tracking, all 69 Mechanism Cards with citations, the 24-hour Timeline, the receptor gauge, streaks, full analytics, and data export — is free forever.
Yes! You can cancel your subscription at any time from your dashboard. There are no cancellation fees or penalties.
You revert to the free tier, which keeps unlimited habit tracking, all 69 Mechanism Cards with citations, the 24-hour Dopamine Timeline, the receptor gauge, streaks, and full analytics. You only lose the two Pro depth features: the 7-Day Simulator and the full 72-hour Timeline with per-bar citation tap-through. You retain Pro access until the end of your current billing period; nothing is lost mid-cycle.
Yes! You can switch between Free and Pro at any time from your dashboard. Upgrades take effect immediately, while downgrades apply at the end of your billing period.
We accept all major credit cards (Visa, Mastercard, American Express, Discover) through our secure payment processor Stripe.
Yes. We use industry-standard encryption for all data transmission and storage. We never sell your personal data to third parties.