Then we use Google Keep for quick TODO lists and shopping lists.
For recurring events (admin, payment reminders, car maintenance, etc.) we use Asana projects. Or we create an Asana project to plan our trips, which are usually very individualistic.
We also have Asana templates for checklists and packing lists.
Google Drive to store scanned documents, admin paperwork and docs and spreadsheets for various long-term notes.
A lot of people we know think that this might be overkill and that we are crazy for setting up a "complex" system like this. Truth is, we never forgot anything and never have to worry either. This frees up our minds to "work" on more creative things.
My wife never used systems like this before and she now recommends it to all her friends and family.
Technology affinity or attraction can be described as an interest reflecting the psychology of a specific portion of the greater populace. If your partner isn't part of that group, there's no point in working against their psychology in any case. It will create growth pressure which has the same effect as anxiety. Unless their gifts and interests are incorporated at a constant reinforcement level, it's a very big ask in a lot of cases.
Personally we have a very flexible system of check-ins that keep things running. I take care of the research and knowledge-base side but I'm good at that. She runs gobs of things that she's good at, that have little to do with tech. She keeps a calendar on paper (for home & family) but she has naturally good detail memory as a backup, etc.
But the dynamics of technology use go way deeper for her too. When we use software together it works best if I write or customize it. Her draw toward technology is on the ephemeral, locally scoped innovation side, where mine is on the broadly scoped contingency and systems stabilization side. So the tech that's fascinating to me looks more like a customized opportunistic stack. To her it looks more like various simple homebuilt apps or automatic emailers.
Good luck as you find the best way to run things for your partnership.
We looked briefly at slack, but email is still the king of knowledge sharing. For more involved plans (vacations, etc) google docs are great.
We also put and maintain our work schedule into it, that way it's easier to plan for vacations.
We also have a shared Google Drive directory with documents related to our home (tax documents, manuals for some appliances, even a document with all the colors used for painting the walls along with the color codes and the finish used).
For sensitive info, we have a Bitwarden "Organisation" set up with info like Health Card insurance, passports, SSN, driver's licence, etc) just in case one of us needs the info when filling up some paperwork.
Now my next hobby project is to build a decently sized ePaper-based calendar/organiser to display our family calendar and other info dynamically in the kitchen.
For actual scheduled events, we just share our personal Google calendars with each other and invite each other to mutual events. No issues there.
The largest technical issue currently is just organizing personal media in a reasonable way. We're in the in Apple ecosystem so shared albums have generally worked for photos and videos, but it's clunky at best and doesn't cover other media or documents.
We also share a spreadsheet to plan monthly expenses. Finally I am looking for a better app for financial management. Currently we use Spendee, but want something simpler, but it seems all apps in this category cater specifically to the top 5 currencies or want to do things like sync to your bank, none of which are supported in my country, hence, the spreadsheet.
Usually in the morning we'll ask the other if they "have anything going on that day (i.e. have to be at school from noon to 2pm)" or "if they have any meetings". We like to keep each other in the loop.
Small whiteboard means it gets cleared and refreshed frequently.
I schedule myself a week at a time, and she prefers a month at a time. So before I schedule anything I speak with her. My family now contacts her to plan holidays however.
We each have our own personal Keepass database for our personal accounts and then a shared Keepass database for stuff we both might need to access. We save this database in iCloud Drive and use Strongbox to use these on iOS/macOS.
All of our documents are scanned and saved in a shared iCloud folder, and both computers are regularly backed up to a RAID 1 NAS by Time Machine.
The physical behaviors are more important any specific technology.
The critical piece for us is a new fresh whiteboard for each day. Write down all the items in play so everything is visible at once. Then prioritize. Most importantly - go do!
Regardless of organization, search, and coordination, step 1 is making sure the data is saved. There's always time to shuffle it around later.
that's about it.