For the argument you have already had.
When the same disagreement comes back, the problem is rarely the facts. It is that one of you always speaks first, and the other answers that version instead of their own.
Why writing beats talking, once.
Perspective Exchange asks each of you for the same two things, separately: what happened, as plainly as you can, and what it made you feel. Neither of you can read the other's words until both have written. Then both versions open together.
Reading them side by side changes the conversation. The facts often agree more than you expected. The perceptions rarely do, and that difference is the thing worth talking about.
There is no scoring, no winner and no chat underneath. Two cards, one screen, and whatever you decide to do next.
How to use it well.
One of you opens it with an account; the other gets a link or a QR code and needs none.
Keep the context short and neutral: Saturday, the dinner with your parents.
Write facts you would both accept from a camera, then the feelings only you can report.
Use the structured mode when one evening holds five separate moments.
Edit until the reveal; after it, the exchange is fixed and can be downloaded.
It is sealed by the server.
Until both of you have written, the server sends each of you only your own take, so nothing can leak through a screenshot or a shared device.
Who is named.
The one who opened the exchange is shown by username. The one who joined by link is shown by a short code, unless they signed in. Between two people who know each other, that is a detail; for anyone else, decide before you start.
It is not a referee.
The app does not judge, summarise or advise. If you want a third person in the room, the practitioner page explains how a therapist or mediator can open the exchange for you.
Try it on something small first.
A missed message, a forgotten errand. The habit is easier to build on low stakes.