Tandem

Just between us

Start the ride

Life. Shared. Tended to.

The most important
thing in your life
are your people.

Both live in one place — the relationships that you are already in. Tandem makes your relationships visible.

You track your steps, your sleep and your spending. Your relationships — the most important investments of your life — are the things you don’t capture. Tandem gives you and your partner, and you and your close friend(s), a record of each relationship and a way to tend to it.

Start the rideI already have an account

Two people · one private space · no feed, no audience

A tandem bicycle with a basket of hearts

Two people, a path together. What you put in is what you get out.

The human truth

Relationships are invisible while you are inside of them.Good weeks and hard weeks blur together, and memory edits them generously.

Everyone wants the same two things: to remember what their life was actually like, and to feel a little closer than they did last year. Both of them live in one place — the relationships you are already in.

Tandem makes your relationships visible and memorable: a number or two a day, a line of your own words, the photos you would otherwise lose in a camera roll.

It is not therapy homework. It is a place for memory and a path ahead, kept by two people who would rather tend it on purpose.

人

person

間

between

人間

ningen — a human being

The Japanese word for a human being is written with two characters: a person, and the space between them.

Watsuji Tetsurō, the twentieth-century Japanese philosopher, made that spelling the ground of his entire ethics. A self is not a finished thing that then goes out and has relationships. The between is where a person actually exists — and where a life is either remembered or lost.

Tandem is a notebook for the between.

Choose Tandem for your relationship partner, or Tandem friend for your close friends.

Every evening

Three small things.
Five minutes.

  • 01

    Time and quality

    How much time you actually shared today, and how good it felt. Hours on their own mean nothing; hours with attention in them mean everything.

  • 02

    Your day, one to ten

    Five quick questions about how you showed up: connection, communication, fun, support, and how you carried the stress you were already carrying.

    Use the pre-loaded quick questions or write your own — you and your partner agree the wording together, so the two numbers still mean the same thing.

  • 03

    Two from the house

    Two questions a day, rotating through the nine floors of the Sound Relationship House — Dr John Gottman's research-backed model of what a relationship stands on.

Memories

Remember every day, forever.

Another three things that are optional.

The line you each wrote, laid out by week and by month, sitting on the day it happened with the photo that belonged to it. Read a Tuesday in March and you are back in it — which is the entire point.

Nothing in this view asks you a question. It is the part of Tandem that simply remembers, for both of you at once.

All three skippable. Your words and photos stay editable whenever you like; the day’s numbers close at midnight, so yesterday stays exactly the way it was.

04

A way to remember today, forever

We all want the day to have been worth remembering, not just got through. Write one thing — big or small, about them or not — and Tandem tells you honestly how likely it is to last.

“I had a great lunch” fades before the week is out. “That amazing Burmese sandwich by the water” does not.

Memory strength meter

too vague · getting there · will last

05

A photo memory of today

One image, pinned to the day it belongs to, so the year ends up being more than a camera roll.

06

A note of gratitude

The thing you would have said anyway, if you had thought to say it. It goes to your partner, and it stays in the record.

The record, back to you

What you and your
partner get.

01

Time and quality

You Your partner
Today7 days30 days60 days
Wed — 40 min apartquality dots: red under 4, gold 4–7, green 8+

Hours each of you felt you actually shared, and how good those hours felt — so a quiet Tuesday never hides.

02

Your day, one to ten

You Your partner
Today7 days30 days60 days
8/107-day avg
You
6/107-day avg
Your partner
Connection
Communication
gap
Fun
gap
Support
Stress
gap

Five quick questions, in wording the two of you agreed together — and every place you saw the same day differently.

03

Two from the house

You Your partner
Today7 days30 days60 days
7/107-day avg
You
7/107-day avg
Your partner
Love maps
Fondness
gap
Turning towards
gap
Positive perspective
Conflict
gap
Dreams
gap
Shared meaning

Two questions a day, rotating through the house until every floor is filled in — for both of you.

Research informed and/or self-guided goals

You and your partner commit together

Your gaps

Where you see it differently

Average difference between your two ratings, last 30 days. Biggest first in each group.

Your day, one to ten

  1. 01

    Fun

    You 9.0 · Partner 6.0 · 12 shared days

    3.0
    closingGoal ideas
  2. 02

    Stress

    You 5.5 · Partner 8.0 · 10 shared days

    2.5
    wideningGoal ideas
  3. 03

    Communication

    You 6.5 · Partner 8.5 · 11 shared days

    2.0
    steadyGoal ideas

The house

  1. 04

    Life dreams

    You 8.0 · Partner 5.0 · 8 shared days

    3.0
    closingGoal ideas
  2. 05

    Turning towards

    You 6.0 · Partner 8.0 · 9 shared days

    2.0
    steadyGoal ideas

For Fun

Two evenings a week with no phones

Play is where you two drift apart first — shared novelty rebuilds it faster than talk.

  • •One screen-free dinner a week
  • •Something new together, once a month
  • •Ask about the day at nine, not ten

Shape it together

How oftenDailyWeekly
Length2 wk4 wk8 wk
Choose & shape
You: CommitPartner: Waiting

Fun · 4 days a week · 4 weeks

One real adventure, twice a week

“Did we do something fun together today?”

Complete83%

9 day streak

Gap 3.0 → 2.1 since you started

You: Committed Partner: Committed

Your shared ride

...And one place to remember
every day together, forever.

Tuesday 29 Sept

Both checked in
A photo she pinned to Tuesday 29 September: a golden-hour walk with coffeeA photo he pinned to Tuesday 29 September: pasta by candlelight at the kitchen table

One thing worth remembering

You

“The towpath at dusk, her coffee gone cold in her hand because she kept stopping to finish a sentence.”

Your partner

“He burnt the garlic at eleven at night, served the pasta anyway, then insisted for a week it was on purpose.”

Thanks for today

You

“Thank you for the walk along the towpath. I put my phone down before you even asked.”

Your partner

“Thank you for eating the burnt pasta without one comment, and for the good coffee after.”

September 2026

27 of 30 days kept together

MonTueWedThuFriSatSun
Sep 28

a late-night talk

Sep 29
A photo she pinned to Tuesday 29 September: a golden-hour walk with coffeeA photo he pinned to Tuesday 29 September: pasta by candlelight at the kitchen table

the burnt garlic

Sep 30

sunset from the porch

Oct 1

just ahead

Oct 2

just ahead

Oct 3

just ahead

Oct 4

just ahead

A word on the house

Seven floors,
two walls.

Dr John Gottman's model is not a theory about compatibility. It is a description of what couples who stay together actually do, day by day, in small unglamorous ways — built from more than forty years observing thousands of couples, and the same framework couples therapists use to see what is working and what is quietly eroding.

The house has nine parts. Seven floors: knowing what is going on in your partner's world, letting them know you like them, turning towards them when they reach out, assuming the best, handling friction gently, cheering on their hopes, and building a life that feels like “us”. Trust and commitment are the two load-bearing walls everything else hangs on.

Tandem asks about it two questions at a time, rotating through all nine, so the whole house fills itself in over a few weeks rather than in one difficult conversation. Because you both answer the same ones, you see the gap before it widens.

Read the model: the Sound Relationship House
TRUSTCOMMITMENT07SHARED MEANING06LIFE DREAMS05MANAGING CONFLICT04POSITIVE PERSPECTIVE03TURNING TOWARDS02FONDNESS & ADMIRATION01LOVE MAPSROOF = SHARED MEANING• values, rituals• bigger pictureLEFT WALL = TRUST• safety• honesty• security• foundationRIGHT WALL = COMMITMENT• intention• choice• long term• showing upBASE / FOUNDATION• daily moments• life together• where it all begins

Finally, a community if you want one

Tandem is a private room first. But there is quiet value in knowing how other couples are doing on the same questions — so once twenty-five couples have agreed to take part, the five benchmark questions become a benchmark: what people actually report, not what a book says they should.

Benchmark

Where you sit

“Do you turn towards each other when one of you reaches out?” — answered by 38 couples so far. Twenty-five is where the comparison begins.

110
You — 6.1 Couples like you — 7.2most sit between 5.4 and 8.0

your last eight weeks

5.2 → 6.1

The spread

How it lands

1
2
3
4
5
6
7
8
9
10

Every couple's answer lined up. Most sit at seven or eight; you are at six — and that distance is the useful part.

Shared questions

What couples ask each other

Any question you write yourself can be put to the community anonymously. What comes back is a number and a spread, never a name.

“Do we stop working and actually talk about the day?”

34 couplesmost said 4

“Does a hard day at work carry into the evening?”

29 couplesmost said 7

“When did we last laugh together about nothing at all?”

Yours, asked anonymously26 couplesmost said 6

The house

You against the crowd

You Median couple
Love maps
+1.6
Fondness
+0.5
Turning towards
-1.1
Positive view
+0.4
Conflict
-0.6
Dreams
+1.0
Shared meaning
+0.5

5 floors ahead of the median couple, 2 behind — a map of where the effort pays.

Only if you opt in

Your answers join the comparison only after you say so, and the count only includes people who did. Leaving takes it back.

Never your name

Other couples see a number and a spread, never who said what. Nothing about you is attached to a result.

Your own questions, if you like

The questions you write yourself can be put to other couples anonymously — a way to ask the thing you have been wondering.

Private by design

Just between us.

One couple at a time, two people in the space, no feed and nothing public. Your ratings only reach each other once you have both been checking in for a week — so the first days belong to you, and the comparison starts from a real habit rather than a single evening.

A tandem bicycle with a basket of hearts
A tandem bicycle with a basket of hearts

Tonight, give each other the five minutes.

It is a place for memory and path ahead, kept between two people who would rather tend to it on purpose.

Start the ride and you will have an invite code for your partner in about a minute. The first entry takes less time than reading this page — and it is the first line of a record you will both be glad exists.

Start the rideSign in

Two people, one private space. Nothing is ever public.