"Co-parenting app" gets used a lot without much explanation of what is actually inside one.
Strip away the marketing and most of them do a handful of practical jobs: keep one calendar instead of two, keep a written record of money and messages, and give both homes the same information at the same time.
The short answer
A co-parenting app replaces the scattered mix of texts, group chats, paper calendars and separate spreadsheets that most separated parents end up juggling. Instead, both parents (and sometimes a mediator, solicitor or extended family member) see the same calendar, the same expense list and the same documents, from their own account.
The point isn't to add another app for its own sake. It's to stop the same information, who has the kids this weekend, whether the dentist bill was paid, what was agreed about summer camp, from living in four different places and three different memories.
A shared calendar, not two separate ones
Most co-parenting apps start with a shared custody calendar: pickups, drop-offs, school events, holidays and the regular handover schedule, visible to both parents at once. Changes get logged rather than lost in a text thread, so there's a record of who asked for a swap and when it was agreed.
ParenThing's calendar is included on the free plan, along with shared tasks and packing lists, so the basic logistics don't need a paid account to work.
Messaging that doesn't escalate
Email and text are where a lot of co-parenting conflict actually happens, because tone is easy to misread and hard to walk back once it's sent. A co-parenting app's messaging tends to work the same way as any chat, but with guardrails: ParenThing's messages run through an unbypassable moderation check that catches language that shouldn't reach a child's screen, and holds it back with a reason before it sends.
This isn't about policing a normal conversation. It's there for the messages written at 11pm, after a bad day, that both parents would probably rather rewrite in the morning.
Expenses, split the way you actually agreed
Who paid for the school trip, whose turn it was to cover the dentist, whether maintenance went through this month, these are the questions that quietly wear people down when they're tracked in someone's head or a side conversation. A co-parenting app usually logs expenses with per-parent approval, so both sides can see the same request and the same answer.
ParenThing's Premium plan (EUR 12.99 a month, or EUR 119 a year) adds expense tracking with approvals and maintenance orders with a server-stamped audit log, so there's a timestamped record rather than a disputed memory.
Documents and agreements in one place
Parenting agreements, school forms, medical letters: these tend to end up scattered across email inboxes and phone photos. A co-parenting app usually includes some form of document storage, and the stronger ones let both parents sign an agreement electronically and export it as a single PDF.
ParenThing stores documents (five files on the free plan, unlimited on Premium) and supports e-signed parenting agreements with a one-page PDF export, plus a secure document vault and court-ready reports on Premium.
Checking in on how the kids are doing
Logistics and money are only part of it. Some apps, ParenThing included, add a simple child wellbeing or mood check-in, with a dedicated, age-appropriate child sign-in, so a child has their own small way to flag how a week has gone without it becoming another adult conversation to manage.
This sits alongside the family circle itself, where co-parents, children, extended family and, where relevant, a mediator or solicitor can each hold their own role and level of access.
What it actually costs
Worth saying plainly: a co-parenting app is rarely simply "free", even when it's free to download. ParenThing's Free plan covers up to two family members, 50 messages a month, the shared calendar, tasks and packing lists, document storage for five files and a family journal, at EUR 0. Premium removes those limits and adds the moderated unlimited messaging, expenses, maintenance tools, mediation support, wellbeing check-ins and the court-ready document vault, for EUR 12.99 a month or EUR 119 a year, one plan per family rather than a separate charge for each parent.
Mediators, solicitors and other family law professionals get a separate professional access tier, which is currently free, with no subscription or per-family fee.
Common questions
Is a co-parenting app actually free?
Most are freemium rather than genuinely free. ParenThing, for example, is free to download, and the Free plan covers the basics (calendar, tasks, limited messaging and document storage) for up to two family members, with a paid Premium plan for unlimited messaging, expenses, maintenance tracking and court-ready documents.
Does each parent have to pay separately?
Not with ParenThing: it's one plan per family rather than a separate subscription per parent, so there's no double billing between two homes.
Can a co-parenting app's records be used in court?
Some apps, including ParenThing, offer court-ready reports and a secure document vault so a dated, time-stamped record exists if it's ever needed. Whether a particular record is accepted in a particular case is a legal question for your own solicitor, not something an app can promise.
What if my co-parent won't use the app?
It works best when both parents use it, since the whole point is one shared record instead of two separate ones. A free plan with a low barrier to try (no card needed, limits rather than a paywall) tends to make that conversation easier to start.
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