Petals: Cannabis Use Tracker

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.