One streak.
Two phones.
Witnessed accountability.

How it works

1. 1

   Invite one partner per habit

   Send a pairing link via text, contacts, or username. Pairing is per-habit, not per-account — a different partner for each habit is the recommended setup, not the exception. Your gym partner, your spouse, your long-distance friend can each be the witness for a different daily ritual.

2. 2

   Both partners check in each day

   Calendar-day check-ins, in your local timezone. Most habits track themselves via HealthKit (workouts, mindfulness, sleep, hydration) — manual confirmation is the exception, not the default. Real-time Home Screen widgets show your partner's status throughout the day, so the accountability is passive.

3. 3

   The streak grows together — or resets together

   If both check in: streak +1, for both. If either misses: streak resets to zero, for both. There is no grace day, no streak freeze, no individual streak that you each maintain separately. The streak is a single shared object that neither of you owns alone — and that's the part that changes the math.

Why a shared streak works

With a solo streak, every miss is a private negotiation with yourself. You're already great at letting yourself off the hook — that's why solo habit apps die in the graveyard on your phone within two weeks of install.

With a shared streak, every miss is a public moment with one specific person. The behavioral research on this is unusually convergent: witnessed accountability roughly triples follow-through compared to private commitments. (Dominican University study by Gail Matthews; Implementation Intentions research by Peter Gollwitzer; peer-effect research by Christakis & Fowler — all three lines point the same way.)

StreakMate compresses all of that into a single mechanic. Three motivations replace one: your goal, their goal, and the streak itself.

Built for these pairings

The mechanic works wherever there's one specific person who can witness whether you did the thing today. The five most common pairings:

• Couples

  Sleep schedules, fitness, screen time, daily walk together

• Roommates

  No-phone evenings, cooking-at-home, shared cleanliness

• Long-distance friends

  Reading, language practice, meditation, journaling

• Training partners

  Gym, running, recovery routines

• Parent + teen

  Homework, screen time, music practice

• Recovery partners

  Sober days, no-scroll days, mindfulness

Picking the right partner is more important than picking the right habit. Read the guide →

Frequently asked

• How does the shared streak actually work?

  You and your partner are linked on a single habit. Both of you check in each calendar day. If both of you check in, the streak grows by one. If either of you misses, the streak resets to zero — for both of you. There's no grace day, no streak freeze, no individual streak that you each maintain separately. The streak is a third object that lives between you.

• Can I have a different partner for each habit?

  Yes. Pairing is per-habit, not per-account. You might share a morning-run streak with your gym partner, an evening-meditation streak with your spouse, and a daily-language-practice streak with a long-distance friend — three different partners, three different streaks, all in one app.

• What if my partner stops checking in?

  You can pause the habit, switch partners on that habit only (your other paired habits stay untouched), or convert it to a solo habit. The strict-reset design is intentional, but graceful exits are supported — partnerships sometimes need to wind down, and the app shouldn't punish the person still showing up.

• Will my partner see my other habits?

  No. Partners only see the specific habit they're paired with — including check-in status, current streak, and any partner-specific widgets. Your other habits, your full check-in history, and any solo habits you track are private to you.

• Can I be paired with someone who doesn't have an iPhone yet?

  Not yet — both partners need iOS. Android isn't available at launch. If your partner is on Android, the cleanest workaround for now is to track the same habit with the manual rule "if either of us misses, we both reset" using whatever tool you're using on Android. Apologies; this is the trade-off of building deep iOS integration first.