Skip to content
Pairbondby The Couples Company
Start free

Meet Pairbond

Your relationship, by the numbers.

Pairbond is a relationship app that brings the world’s relationship research into one place. See where you two are headed, what’s working and what to work on, then raise your odds with small daily steps.

Start freeTry the 10-second odds check

Built on 4.7 million+ data points and 50 years of relationship research

Free to startNo cardPrivate by design

A sample of the app, with made-up names and numbers
  • Know your oddsOdds built on what happened to people in real relationships, followed for years.
  • See where you standA 0 to 1,000 score across eight areas, compared with couples at your stage.
  • Grow togetherAnswer apart, reveal together, then five minutes a day.

Free couples compatibility test

Built to last? See how couples like you did.

Answer three quick questions and see what happened to people in relationships like yours: 4,398 of them, followed for up to 8.5 years in two national studies. It takes about ten seconds.

Your odds, in 3 taps

Answer to see your odds

Do you live together?
How would you rate your relationship right now?

3 taps to go

Single? See if you’re relationship ready

The data

All of it, finally in one place.

We gathered the work of the world’s leading relationship researchers, two major national studies and 4.7 million+ data points, and built them into one engine. Every answer you give runs through it.

Four kinds of evidence. One engine.

Tap a group to light it up.

Illustration, not to scale.

  • The national studies: How Couples Meet and Stay Together, 2009 and 2017: the surveys Pairbond’s odds are built on.
  • The research library: Decades of research on what makes relationships last, from single studies to the biggest meta-analyses, gathered in one library.
  • The survey benchmarks: Public national surveys that show how people at your stage tend to answer. Their samples, not ours.
  • Pairbond’s own questions: Every question carries a note on the research finding it rests on.

The data, at work

Every number has a job. It runs your app.

Pairbond on a laptop: the My score page, with a Pairbond Score of 570 to 670 on a gauge and a chart of the eight areas. Sample data.
Pairbond on a phone: the odds card, about 95 in 100 couples like you still together about 3 years later. Sample data.
  1. 1Your score1,600+studies inside 40 meta-analyses shape how much each answer counts
  2. 2Your odds4,398people in real relationships, followed up to 8.5 years
  3. 3Your eight areas460+sources across 50 years of research behind them
  4. 4Your questions216written for Pairbond, each traced to a research finding

Sample screens from the app, with made-up names and answers

4.7 million+data points960,000+participants170,000+national survey responses
What these numbers count
  • 4.7 million+ data points from two national studies: Every cell in the two studies’ data files, 4,703,084 in all (2.5 million+ hold an answer).
  • 960,000+ participants across the studies we gathered: The sample sizes of the studies in our library, added up. Someone can be in more than one study, so it isn’t a count of unique people.
  • 170,000+ national survey responses drawn on: Published sample sizes of the national surveys behind “how you compare”, such as the General Social Survey. Their samples, not ours.
  • 1,600+ studies inside 40 meta-analyses: Counted with the overlap removed: the largest meta-analysis on each topic.
  • 460+ sources in one library: Studies, meta-analyses, reviews, national surveys and reports, each counted once.
  • 50 years of relationship research: From the oldest source in the library (1976) to the newest (2026).

Two national studies, followed for years

The odds rest on two national studies of real relationships in the United States, which went back to the same people again and again to see who stayed together.

How Couples Meet and Stay Together, 2009 and 2017

people surveyed
7,512people surveyed
completed interviews in 9 waves
19,124completed interviews in 9 waves
the longest anyone was followed
Up to8.5 yearsthe longest anyone was followed
relationship outcomes, 749 of them breakups
4,481relationship outcomes, 749 of them breakups
Completed interviews in each wave2009 study, 2009 to 20172017 study, 2017 to 2022
  • 2009 study, wave 1, 2009: 4,002 interviews
  • 2009 study, wave 2, 2010: 2,520 interviews
  • 2009 study, wave 3, 2011: 1,960 interviews
  • 2009 study, wave 4, 2013: 1,536 interviews
  • 2009 study, wave 5, 2014 to 2015: 1,127 interviews
  • 2009 study, wave 6, 2017: 640 interviews
  • 2017 study, wave 1, 2017: 3,510 interviews
  • 2017 study, wave 2, 2020: 2,107 interviews
  • 2017 study, wave 3, 2022: 1,722 interviews
  • 112,000+ years of relationship history, across two national studies
  • 19,000+ years of real relationships tracked

Years of relationship history add up the years together that people reported. Years tracked add up the time each person was followed after their first interview. Rosenfeld, Thomas and colleagues, How Couples Meet and Stay Together, Stanford University Libraries, 2009 and 2017 cohorts. Run at Stanford University. Pairbond is not affiliated with Stanford.

Does it work?

91 in 100

Show it two couples it has never seen, one that splits and one that lasts. Pairbond spots the one that splits 91 times out of 100.

We put it up against the best published model and seven others, on new couples years later. Pairbond came out on top.

And it learned from 4,398 real relationships. The best-known divorce-prediction studies followed 79 to 179 couples.

Out of 100 tries, how often each model spotted the couple that split

  1. Pairbond91.4
  2. Best published model (2014)90.9
  3. University thesis model (2023)88.8
  4. Married plus years together86.8
  5. Years together alone83.9
  6. Marital status alone80.7
  7. Living together alone79.1
  8. Age, education, income and race74.4
  9. How you rate it, alone71.2
50 is a coin flip. Couples none of the models had seen: each learned from one national study and was tested on the other, both ways round. Three-year outcomes.
How we tested
  • Every model learned from one national study and was tested on couples from the other, both ways round (2009 and 2017). The chart shows the average of the two.
  • Pairbond came out on top both ways, ahead of the best published model for this data (Rosenfeld, 2014), a university thesis model (2023) and simpler predictors such as marital status, years together, and age, education, income and race.
  • 91 in 100 is across every stage of relationship, and most of it comes from how long couples have been together and whether they live together. Inside one stage it’s 70 to 89 in 100.
  • It also forecast how many couples would split: 12.5 in 100 within three years, against 12.4 in 100 who did.
  • In a second test, cross-validation across all 4,398 people, Pairbond and the top published model came out level, and machine learning given 35 answers couldn’t beat it.
  • The best-known divorce-prediction studies followed 79 to 179 couples, and measured their accuracy on the same couples their models learned from.
  • They’re odds for couples like you, not a promise.

And we’re building the world’s largest relationship database, one couple at a time.

Start free

Free to start · No card · Private by design

Inside the app

Not another quiz. A relationship app that learns.

  1. 01The score

    Your Pairbond Score

    Like a credit score for your relationship: 0 to 1,000, across eight areas, compared with couples at your stage.

    Pairbond

    Your Pairbond Score

    Sample
    Score gauge: 590 to 690 out of 1,000, Strong01,000
    590 to 690out of 1,000 · Strong

    Compared with couples at your stage

    Eight areas

    • Communication78
    • Conflict and repair52
    • Money64
    • Home and daily life71
    • Family and friends58
    • Intimacy83
    • Future69
    • Self and wellbeing61

  2. 02The reveal

    Answer apart. Reveal together.

    You each answer on your own phone. When you’re both done, your answers appear side by side, and the differences become your best conversations.

    Pairbond

    The reveal

    Sample

    When we disagree, we work it out calmly.

    Jordan

    Answered

    Jordan

    Agree

    Sam

    Answered

    Sam

    Not sure

    A difference. Talk about it: what does a calm disagreement look like for each of you?

    We agree on where we are headed.

    Jordan

    Answered

    Jordan

    Agree

    Sam

    Answered

    Sam

    Agree

    A match

  3. 03Daily steps

    Five minutes a day

    Small daily steps built from your answers. Your score moves as you do them.

    Pairbond
    Day 5 of 14Sample

    Today: Communication

    When I share something that matters to me, my partner gets what I mean.

    DisagreeNot sureAgree

    About 4 minutes

    Your 14 days

    4 done

    1234567891011121314

    Your score moves as you go: 640 to 652 this week.

  4. 04Always learning

    Odds that get sharper

    Pairbond keeps learning from what happens to couples over time, so your odds get more personal the longer you use it.

    Pairbond

    Your score over time

    Sample
    Score history: Week 1 640, Week 3 662, Week 6 701, Week 9 694, Week 12 738Week 1Week 12

    Your odds, getting sharper

    0100

    First look: a wide range, from couples like you.

    After check-ins: a narrower range, more about you two.

    Check-ins

    A quick “how are you two?” now and then teaches the odds what happens next.

    1. 6 months
    2. 1 year
    3. 2 years
    4. 3 years

Getting started · about 3 minutes

A free couples compatibility test, in three steps.

  1. 1

    Take the 3-minute quiz

    Get your first score and see how you compare with couples like you.

  2. 2

    Invite your partner

    They answer privately on their own phone. Then the reveal.

  3. 3

    Raise your odds

    A 14-day plan, then a few minutes a day.

Start free

Myth or fact

What actually predicts a lasting relationship?

Tap a card to flip it.

Pairbond only scores what the research supports. The fun stuff stays labelled as fun.

For one

Single? See if you’re ready.

Your Readiness Score shows what you bring to a relationship and what to work on before the next one. When you meet someone, invite them, and your work carries over.

Am I ready? Take the quiz

Your Readiness Score

Sample
Score gauge: 560 to 660 out of 1,00001,000
560 to 660out of 1,000

You bringSteady when things get close

To work onSaying what you need

Pricing

Free to start. Premium for the full picture.

Free

$0

No card needed

  • The 3-minute quiz
  • Your score and your odds
  • Invite your partner
  • Your first reveal together
  • A daily question
  • The love style and attachment quizzes

Premium

14-day free trial

$12.99a month

or $79.99 a year, for both of you

  • Everything in Free
  • The full report, every area in depth
  • A 90-day plan with one habit for each area
  • The Couples Contract, included with the yearly plan
  • Your answers never lock, even if you stop paying.

The Contract is a conversation in writing, not a legally binding document. Premium opens soon. Nobody is charged before then.

Start free

Questions

Your questions about Pairbond, answered.

1.What is Pairbond?

Pairbond is a relationship app from The Couples Company. You take a three-minute quiz and get your score and your odds, then invite your partner, answer apart, reveal together, and work on what matters with a few minutes a day. It is free to start.

Take the free quiz
2.Is this a couples compatibility test?

Yes, and it is built on real data. The quiz shows where the two of you line up and where you don’t, across eight areas, and your odds come from what happened to people in real relationships in two national studies. It describes how couples like you did, so it is a map for talking, never a verdict. Prefer to answer together on one phone? The Couples Company has a free couples compatibility test for that.

Try the one-phone compatibility test
3.Will my relationship last?

Pairbond gives you real odds. Three taps show how people in relationships like yours did: 4,398 people in real relationships, followed for up to 8.5 years in two national studies. They’re odds for couples like you, not a promise, and Pairbond then shows you what raises them.

See your odds in 10 seconds
4.Is there a free relationship test or quiz for couples?

Yes. The 10-second odds check on this page and the three-minute quiz are free, with no card, and you can take them on your own. Your partner can join later for the reveal and a sharper score. Single? The readiness quiz is free too.

Am I ready for a relationship?
5.Is there a marriage quiz?

Pairbond works for married and engaged couples too. You tell it your stage (dating, living together, engaged or married), and your score is compared with couples at your own stage. It also makes a good set of conversations before a wedding, though it is not marriage counseling.

Questions to ask before marriage
6.Is this scientific?

It is built on two national surveys of real couples run at Stanford, 4,398 US adults followed for years, and we measure its accuracy and show it on this page. It predicts for couples like you. It is never a promise about the two of you.

7.Do we both need to take it?

No. One of you can start alone. Your partner adds the reveal and a sharper score.

8.Is it private?

Yes. Until you save, or ask for an emailed link to finish later, your answers stay in your browser. Saved answers are encrypted, never sold, and you can delete everything at any time. To make Pairbond’s predictions better we use answers without your name or email: that is on by default, and one switch in Settings turns it off. Answers about intimacy and mood are only used if you give a separate yes, and safety answers are never used.

9.Will it tell us to break up?

No. It shows where you are and what helps. It never tells anyone to stay or go.

10.Is it therapy?

No. Pairbond is a tool for noticing and talking. When a topic needs more than an app, it points you to real help.

11.What does it cost?

Free to start. Premium is $12.99 a month or $79.99 a year for both of you, with a 14-day free trial. Premium opens soon, and nobody is charged before then.

Your odds are waiting. It takes 3 minutes.

Start free

Free to start · No card · Private by design