Petals is a free and open source cannabis tracker that helps you understand your habit — and change it at your own pace.

Whether you want to quit weed, take a tolerance break, cut down gradually, or simply know how much you actually use, Petals gives you the numbers. No account, no sign-up, and your data never leaves your phone.

TRACK YOUR USE

Log every session: amount in grams, cost per gram, date and time
Record the consumption method: smoked, vaporized, edible or other
See the time since your last use, down to the second
Track how much you spend on weed, today, this week and overall
Add a use in one tap from the home screen widget

UNDERSTAND YOUR PATTERNS

Statistics and graphs of your cannabis usage over time
Usage by hour of day and by day of week, so you can see when the urge really hits
Filter your history and spot the trends you would never notice from memory
Watch the real cost of the habit add up

CUT DOWN AT YOUR OWN PACE

Time-gate your sessions: set a minimum interval between uses and let the timer hold you to it
Register pause periods for a tolerance break or a full stop
No streak shaming, no pressure: the app shows you the data, you set the pace

WITHDRAWAL AND DRUG TESTS

Track withdrawal symptoms over time: irritability, anger, restlessness, sleep difficulty, anxiety, decreased appetite and discomfort
Estimated THC concentration after your last use
Estimates of when urine, blood, saliva and hair tests may come back clean, with the sources cited

PRIVACY BY DESIGN

All of your data stays on your device
No account, no cloud, no analytics
Lock the app behind a personal PIN
Export and import everything as plain CSV files — your data belongs to you

HARM REDUCTION

Built-in harm reduction information, because using less safely beats using blindly

FREE AND OPEN SOURCE

Petals is free and licensed under the AGPL-3.0. The full source code is public, contributions are welcome, and the app is translated by its own community of users.