A card is made of blocks. That is the whole idea. Different cards hold different blocks, which is why a dinner and a potluck do not look the same. Everything below is tappable.
The blocks that exist

Saturday dinner

One card, five blocks stacked

Block 1 when and where

WhenSaturday, 6:30 pm
WhereBlue Fig, Anaheim

Block 2 details you collect

ReservationUnder Trish, 6:30 sharp
ParkingStructure on Katella, free after 6
Add another detail

Block 3 a tick-off list

Make the reservation
Get the head count
Send the address

Block 4 who is coming

Sara Mitchell
Jay Whitman
Dev Raono number saved

Block 5 a link

Menubluefig.com/menu

What I need from you here

Are those the right five kinds of block to start with, or is there one you already know is missing.

The ones I did not build, so you can say if any belong: a photo, a running cost split, a countdown to the date, a free notes box.

Same blocks, different cards. Three ready-made ones you would get out of the box. Note none of them look alike.
Ready-made

Potluck

The point of this card is who brings what

WhenSunday, 2:00 pm
WhereMy place

Who brings what

Sara Mitchellsalad
Jay Whitmandessert
Aurora Belldrinks
Marcus Leetap to add
The tick means coming, not brought. Tell me if you want those to be two separate things, because for a potluck they probably are.
Ready-made

Day out

Disneyland birthday, July 17

Meeting atMain gate, 8:45 am
TicketsAlready in the app, Trish has them
ParkingMickey and Friends, $35

Bring

Sun cream
Portable charger
Birthday pin from guest services
Ready-made

Just the details

No date, no people. Somewhere to put things you keep looking up.

VenueThe Wells Room, 4th and Main
Door code4412
ContactMarguerite, 555 0148
Add another detail

This is the one that replaces the notes app.

At scale. A card with 30 people on it draws 30 rows at 52px, roughly three thumb scrolls, and the send button sits under the block rather than at the end of the whole card. Ticks fire on lift with a movement threshold, so scrolling past them never ticks anybody.
The card versus using it. This is the bit I had backwards before. The shelf holds your cards. Using one makes a copy for this Saturday and leaves the card alone.

Your cards

Starred ones stay on top

Saturday dinnerUsed 6 times, last on Aug 2
PotluckUsed 4 times, last on Jul 28
Artist swapUsed 3 times
Day outUsed once

Tap a star to move a card up here. Tap a card to use it.

Tapping Saturday dinner

Use this card

What is this one for? Saturday dinner with the D23 crowd
WhenSaturday, 6:30 pm

It copies the blocks and the questions, empty of last time's answers. Your Saturday dinner card is untouched.

At scale. 20 cards on the shelf shows starred ones first, then the rest by most recently used, and anything past ten folds behind a "See all" line. Never 20 rows.

What I need from you here

Does a card belong to a group, sit on its own, or both. You do not have to answer in database terms: just tell me whether you would go looking for the Saturday dinner card inside the D23 group, or in one place where all your cards live.

Building your own. Your words: create their own based on different types of blocks and sections. Tap the blocks to add and remove them, the card below rebuilds as you go.

New card

Name this card. Book club

Add blocks

What I need from you here

Is building your own something you want in the first version, or would you rather I ship three or four ready-made cards first and add this later. It is real extra work, and I would rather spend it where you want it.

One button. With the phone mark back on it, and the exact thing it opens shown underneath.

Saturday dinner

4 of 6 ticked, 1 with no number

Dev Rao has no number and will be left out

Tap the gold button, this opens

Messages, new message
To: Sara, Jay, Aurora, Marcus
Saturday dinner Saturday, 6:30 pm Blue Fig, Anaheim Reservation under Trish, 6:30 sharp Parking is the structure on Katella, free after 6 Menu: bluefig.com/menu

Their phone numbers go in the To line, and your phone shows their names instead of the digits because they are in your contacts. The card's words become the message. Nothing sends. You read it and hit send yourself.

Three things worth knowing

It does not make a saved groupIt starts a message to those people. On an iPhone, if you already have a thread with exactly those same people, it lands in that thread. One person different and it is a new one.
Copy the message copies words, not numbersThe dinner details, the same text as the message. That is all.
There is a third way, and it is your callYour phone's share sheet, the standard panel that offers Messages, WhatsApp, Mail. Works on every phone including every Android, but it cannot fill in who it goes to. You pick them in the sheet.

What I need from you here

One button with the small Copy line under it, or do you want the share sheet as a third option too. Those are all the paths that exist.

What to call them. Your note: Cue Cards might be too cheeky given the cue sayings going in elsewhere.

The options

CardsPlain. "Your cards." "New card." Leaves the whole cue budget for the sayings.
Cue cardsThe pun is right there and it is a real phrase. Risk: it reads as flashcards, and it spends cheekiness you wanted for the sayings.
PlansAlready means something else in the app, the tasks under a group. Would collide.
DetailsHonest about what they hold, but flat, and "little details" is already taken.
KeepsakesWarm and on compass, but wrong for a potluck you are organising this week.

My read, for what it is worth: Cards. The thing is already visually a card, so the plain word disappears into the object, and Cue stays available for the moments that earn it.

What I need from you here

Pick one, or tell me none of them are right and I will bring more.