How do you keep track of vaccinations when you've moved countries with your kids?

[DreamyLemons]

We've lived in three countries and have two children. Every time we moved, I spent a day trying to work out what vaccinations they've actually had, on which schedule, and what's coming up next - because the German booklet doesn't map neatly onto the UK one, which doesn't map onto the Dutch one.

Right now I'm juggling two paper booklets per child and a spreadsheet I started but is tricky to keep up to date, and trust - when things change. It's a mess and I'm convinced there must be a better way 😅

Has anyone cracked this?
Do you just trust the paper records from each country? How do you match differences - such as vaccine types, number of boosters, timelines?
Have you found a digital solution that actually works across different national schedules?

We are an expat family. I have everything written in whatever health book they got first and no other country has demanded I do it differently or given me a different health book. Every time it’s time for a vax appointment I just take the list to the local doctor and they work out any gaps based on their schedule and decide what the kids need next.
It’s not a perfect system - we recently spent 2 years in the UK and the silly bureaucratic system was completely “computer says no” about DD’s vaccines from an EU country and we kept getting dogged reminders, demands, and leaflets sent to us via every possible means of contact, when in reality she was fully vaccinated and we had taken evidence to the GP surgery 3 times.
It gets a lot easier after age 4 when the bulk of them are out of the way. But we live in Asia now so sourcing/tracking the travel vax on top of all the usual ones is also tricky!

I have a sheet with all vaccinations.
Updated GP on arrival. Works well.