Gamified Quit-Smoking PWA with XP, Levels & Subscriptions

QuitWell is our own consumer app: a gamified PWA that helps Portuguese speakers quit smoking by turning each smoke-free day into progress in a game.

Quit-smoking apps are usually counters people forget after a week. We wanted daily reasons to come back, and a business model where users pay once they have seen the value.

Real-time counter for smoke-free days, money saved and cigarettes avoided

Health recovery milestones, including lung recovery progress

XP, levels 1 to 50, daily challenges (hydration, breathing, check-ins) and badges

Lives that measure habit adherence (not relapse), and shields for difficult days

An evolving, customisable avatar with outfits and accessories

An SOS crisis mode for cravings

Freemium model: free up to level 10, then a PRO subscription with free trial or a lifetime plan, with payments in EUR, USD and BRL

Installable on iOS and Android as a PWA, no app store needed

The paywall sits inside the game, at the point where users are already engaged, instead of on day one. The same approach works for any subscription product: show the value, then ask for the payment.

Next.js, Tailwind, Supabase (auth and database), Stripe (subscriptions and one-time payments), PWA.