Short answer: an app for your wedding, an app for your family, or an app for your kids is a free template here, named after your people, installed on their phones from a link with no store involved. That last part matters more for these than for any business app, and the end of this note says why. First, which template.
An app for your wedding
What a wedding party needs is an itinerary everyone can see, the places, and a way to talk that is not forty people in one chat. The travel planner is that: trips with stops and times, bookings you record as you make them, a packing list, a map of the places, and a join code you hand to companions. Name it after the couple and give guests the code. For the day itself, the events app takes RSVPs against a capacity and gives each guest a QR pass your usher can scan at the door. For the hen or stag weekend, the expense splitter tracks who paid for what and who owes whom.
What these will not do: book flights or hotels, and move money between people. You record the bookings you made elsewhere, and settling up happens in your bank app.
An app for your family
The group messenger is a messenger between people who know each other: direct and group conversations, photos, typing and read receipts, unread counts, and a push that opens the right conversation. Nobody is in it who you did not add. The recipe box holds the family recipes and plans the week’s dinners with a shopping list. The expense splitter works as well for a couple as for flatmates. If you want all three in one app, start from the messenger and ask for the rest in chat; each change costs a few credits.
An app for your kids
Two options. For a child’s routine, the habit tracker: a short list of daily things to tick off, a streak, and a stats page that makes the streak feel like something. For keeping in touch, the family messenger above, where the only people who can reach your child are the ones you added. If what you pictured is a game, describe it in plain English and see what comes back for about fifteen credits, but the templates are not games.
Why the install link matters here
A business app wants to be on the store. A family app does not. On Android, the app installs on every phone from a link and a QR code with no developer account and no review, and the link always serves the newest version. That means no store listing for your wedding, no public page for your family, and none of the extra rules Apple and Google apply to apps aimed at children, which only apply to apps published on the stores. On iPhone, Apple only allows installs through a developer account, $99 a year, which is the one cost a family app cannot avoid if the family has iPhones.
What it costs
The template is free, no card, no time limit. Changes cost a few credits; Basic is $5 a month with 50 credits, Pro is $19 a month with 250 credits, Business is $49 a month with 1000 credits. When the wedding is over, the app can stay as the group’s photo and chat archive, or you can delete it and every row goes with it.
Forty people in one chat is not a plan. Forty people in one app with the plan in it is.