You don't have to wait for the other parent to start keeping a record. Everything you add is timestamped when you add it.
What works now
- Custody: log days and nights on the Calendar.
- Costs: log what you've paid, with receipts.
- Requests: make them as usual. Nobody can answer until the other parent joins, but you can share any pending request from your own phone, and the record notes when you did.
- History and reports show everything you've logged.
How it shows later
When the other parent joins, they see everything. Reports and exports label the period before pairing as recorded by one parent. That's simply a fact about the record; it says nothing about either of you.
De Kind doesn't contact them unless you ask
The only message De Kind ever sends to someone who hasn't joined is the single invite email, and only if you choose to send it. Shared requests go from your own phone.