

7 features to support you from Day 0 to Day 421
QUIT PREPARATION CHECKLIST
Be Ready for Day 1
4:21's step-by-step list helps Day 1 feel doable, not overwhelming.


PERSONALIZED QUIT COACH
Got Questions While You're Quitting?
24/7 support from Sage. She provides personalized answers about triggers, withdrawals, cravings, and more, so you've always got support in your pocket.
WITHDRAWAL TRACKING
Track and Tackle Symptoms
See when 17 withdrawal symptoms peak and fade, plus tips to help you through.


DAILY CHECK-INS
Keep on Track
Reflect and stay accountable with quick daily check-ins.
ACHIEVEMENTS
Celebrate Your Wins
Stay motivated with 35+ milestones that mark every step of your quit journey.


PROGRESS TRACKING
Time and Money
Watch the seconds and cents add up into days and dollars as you stay quit.
RECOVERY
Better Health
More energy? A clearer mind? Watch your health bounce back across 14 areas as you keep going.

What 4:21 Users Are Saying
"Amazing app. Over two weeks weed free and really have the app to thank!"
-Natalie
35, New Zealand
"Incredible app!"
-Shelby
27, United States
"This app is so helpful. Especially to those who might feel like a burden reaching out to others. Definitely recommend!"
-Cody
23, Canada
Life after 4:20 starts now.
Download 4:21 today.
