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My ex won't use a co-parenting app: what can I do?

Published 14 October 2026 · About 6 minutes to read · UK

You've found a tool that could make co-parenting calmer: one place for messages, the calendar and costs. Your co-parent says no, or just never signs up. It's one of the most common frustrations separated parents talk about. This guide is honest about what you can and can't do, and how to keep things clear either way.

Why co-parents say no

It helps to understand the reason before you respond. Common ones are:

• Cost. Some co-parenting apps charge each parent a subscription.
• Feeling watched. An app that keeps a permanent record can feel like evidence-gathering, especially if things are tense.
• "It's another thing to deal with." They already use WhatsApp or text and don't see the problem.
• Privacy worries about where the data goes.
• It's about control, or about the relationship rather than the app.

How to ask in a way that works

You can't make another adult use an app, and pressure tends to backfire. What usually helps is making it about the children and making it easy to say yes:

• Lead with what's in it for them and the children. Fewer missed messages, both of you seeing the same school dates, no more "you never told me".
• Take the cost off the table. If money is the worry, choose something that's free for both of you.
• Acknowledge the record. Say plainly that a permanent record applies equally to both of you, and that it's there to avoid misunderstandings.
• Suggest a trial, for example until the end of half-term, then review it together.
• Ask once, calmly, in writing, then leave it. Our communication tips have example wording.

Cafcass suggests planning difficult conversations: agreeing a time and place, and setting an agenda so there are no surprises. [1] How you'll communicate is a good topic for that kind of conversation, and for a parenting plan. Cafcass suggests a plan covers communication. [2]

If the answer is still no: agree one channel

The tool matters less than the habit. If your co-parent will only use text, WhatsApp or email, agree to keep all child-related communication in that one place, so nothing gets lost across several apps and phone calls. Then:

• keep messages short, polite and about the children;
• confirm anything agreed in a phone call or at a handover in a short message afterwards;
• don't delete the conversation; and
• never pass messages through the children. Cafcass advises against it. [1]

If messages ever need to be shown to a mediator or court, our guide to WhatsApp messages and family court explains how they're generally handled.

What you can do on your own

Even if your co-parent never joins anything, you can still keep your side organised:

• Keep your own calendar of the arrangements, school holidays and what actually happened.
• Keep receipts for children's costs and send them promptly. See splitting child costs.
• Keep a dated diary if arrangements aren't being kept. Citizens Advice suggests a diary of times an agreement hasn't been kept, as it can show why an arrangement isn't working. [3] Our guide to keeping a factual record explains how to keep it fair and factual.
• Control your own side. Cafcass points out that you can't control your co-parent's attitude, but you can control your own. [1]

When to get help

If communication has broken down completely, family mediation can help you agree practical ground rules, including how you'll contact each other. You can find an accredited mediator through the Family Mediation Council. [4] Our mediation guide explains costs and the £500 voucher scheme.

If contact with your co-parent is very difficult, parallel parenting keeps communication to the minimum the children need. If there has been abuse, don't push for more contact than is safe, and talk to a specialist service first. The National Domestic Abuse Helpline (Refuge) is free and open 24 hours on 0808 2000 247. [5] If you're in danger, call 999.

Quick answers

Sources

1. Cafcass, Communicating with your child's other parent after separation: cafcass.gov.uk
2. Cafcass, How a parenting plan can help (Our Child's Plan): cafcass.gov.uk
3. Citizens Advice, Your child arrangements aren't working: citizensadvice.org.uk
4. Family Mediation Council, Find a local mediator: familymediationcouncil.org.uk/find-local-mediator
5. National Domestic Abuse Helpline (Refuge): nationaldahelpline.org.uk

All sources checked on 14 October 2026. We aim to review this guide at least every three months. Spotted something out of date? Email support@handoverhub.co.uk.