The evidence for calmer co-parenting.

It touches a million children a year.

Separation and divorce are not edge cases. In the United States alone, the number of children living through a parental split each year is measured in the millions — which is why getting the aftermath right matters at population scale.

Sources: CLASP, Children & Divorce: A Snapshot; U.S. children-of-divorce data [5].

What harms children is the conflict — not the separation.

This is the most robust finding in the field, and it is good news: separation itself is not what predicts poor outcomes. Ongoing conflict between parents is. Children who are exposed to conflict that is frequent, intense and poorly resolved are at raised risk of anxiety, depression, aggression and problems at school; a separation that lowers the conflict can protect them.

The leading explanation — emotional security theory — is intuitive: children read their parents’ conflict as a threat to the stability of their world, and it is the sense of an unresolved, ongoing war that wears them down, not a single argument.

Sources: Buehler et al., Interparental Conflict and Youth Problem Behaviors: A Meta-Analysis [1]; Harold & Sellers, Annual Research Review, J. Child Psychology & Psychiatry (2018) [2]; Davies & Cummings, emotional security theory.

How you co-parent matters — on its own.

If conflict is the risk, cooperation is the protection — and the research is clear that it works independently. How well two parents co-parent after a split predicts how their children do over and above how the couple’s own relationship went. Even when a marriage ended badly, a cooperative co-parenting relationship afterwards measurably helps.

Sources: Teubert & Pinquart, meta-analysis of coparenting and child adjustment (2010); Rejaän, van der Valk & Branje, Postdivorce Coparenting Patterns (2022) [3]; Frontiers in Psychology review (2022) [4].

Courts weigh dated patterns — not memory.

When a disagreement does reach a mediator or a court, the guidance from family-law practitioners and custody evaluators is remarkably consistent. A factual, timestamped record turns “he said, she said” into verifiable facts. Decision-makers look for patterns over time rather than isolated incidents, and a clean, dated timeline reads as far more credible than an emotional account reconstructed after the fact.

We don’t say “court-approved”, because no one can honestly promise that — what a court accepts is up to the court. But a clear, tamper-evident, dated record is exactly the kind of thing a mediator or a court can work from, and it is the opposite of a folder of screenshots that can be cropped, deleted or disputed.

Sources: guidance from family-law practitioners and custody evaluators; National Council of Juvenile and Family Court Judges on weighing credible evidence [6].

One tamper-evident record beats a shoebox of screenshots.

Put the two threads together — lower the conflict, and keep a record you can rely on — and the case for a single shared tool writes itself. Keep the communication in one place; record parenting time and exchanges with dates; capture the pattern, not just the flashpoint. Screenshots scattered across two phones are easy to dispute. One continuous, exportable, tamper-evident record is not.

That is what GrownUps is: one civil thread neither parent can edit or delete, a shared calendar that generates every handover, shared expenses with a running balance, and a clear record you can export free, forever. It applies what the research says — and it is free for both parents.