Tandem - Habit Buddy

Stick to habits with someone you care about. 3 things a day, check off together, leave notes on each other's tasks, watch your streak grow.

Tandem · A habit tracker built for exactly two people.

Sticking to habits alone is hard. Together, it's easier.

Whether you're studying together, hitting the gym, reading more, or just trying to wake up earlier — Tandem turns solo accountability into a shared journey with one specific person.

▢ Core mechanics

• 1–5 daily tasks, freely edit your goals • Side-by-side comparison: see your partner's progress in real time • Per-task messaging: leave "You got this!" or "Same here!" on each other's tasks • Auto-calculated completion rate + daily winner badge • Configurable 14–30 day cycles

▢ Designed to keep you going

• Perfect day: a gold trophy + confetti animation when you complete everything • Streak badges: 3-day, 7-day, 14-day, 30-day, 100-day milestones • Task templates: 12 common habits like "Morning run", "Read 30 min", "Journal" — one tap to add • Mood tracking with 5 emoji levels • Swift Charts trend lines: see completion rate over time

▢ Privacy first

• Sign in with Apple — we don't see your password or email • All data stored in your private iCloud container — the developer cannot read it • Only you and your partner can see your data; nobody else • No third-party analytics, no ads, no tracking SDKs

▢ Who it's for

• Friends who want to build habits together • People who can't stick to solo habit-tracking apps • Lightweight, clean, ad-free tool lovers • Apple ecosystem fans who want data in iCloud

▢ About the name "Tandem"

Tandem is a bicycle built for two — pedal in sync to move forward. That's the spirit of this app: you're not alone in the habit, someone is right there with you.

— Made by an independent developer · Ad-free · Privacy-first —