A swim school app is a booking app that knows which level the child swims at.

The record is the swimmer, not the account

One adult pays and two or three children swim. If the booking hangs off the account, every later question gets harder: which class is the younger one in, has the older one passed her level, who was absent on Tuesday. A swim class app keyed to the class can answer who is in lane three and little else. Make the swimmer the record. The account pays and gives consent. The swimmer has a date of birth, a level, a class and a history.

A level is not a label. It is a list of skills with a tick against each one, and the point of an app over a laminated card is that the list travels with the child. Instructors assess on deck, with wet hands, in the last two minutes of a lesson. If that takes more than a few taps it gets done from memory in the car park, or not at all.

Capacity is the field people get wrong. It is not a room size. It is the ratio you run for that level multiplied by the instructors on deck, and the ratio is tighter for preschool than for stroke development. Store it on the class, not in a policy document, because the booking screen has to turn away the ninth child by itself at nine at night.

What the law requires when the data is about a child

The Children's Online Privacy Protection Act is the rule people mean when they ask about this. It covers operators of commercial websites and online services, mobile apps included, that are directed to children under 13 and collect, use or disclose personal information from children. It also covers a general audience service with actual knowledge it is collecting from a child under 13. Personal information is defined widely, and it includes photographs, video or audio containing a child's image or voice.

One distinction decides most swim school apps, so it is worth stating exactly. The FTC's guidance says COPPA applies to personal information collected online from children. In the ordinary swim school app the parent types the child's name and the instructor ticks the register. That is an adult supplying information about a child rather than the child handing it over, and a photograph a parent uploads sits in the same place.

What changes the answer is giving children a way in: swimmer logins, a child uploading a clip of their own stroke, any chat a young member can type into. Then you owe the parent direct notice and verifiable parental consent before you collect anything. The FTC recognises several methods, among them a signed form returned by post, fax or scan, a credit card or other online payment transaction, a call to trained personnel on a toll free line, and a government issued ID checked against a database.

The Rule has been amended. The final amendments were published in the Federal Register on 22 April 2025, took effect on 23 June 2025, and most provisions carried a compliance date of 22 April 2026. They include separate verifiable parental consent before a child's personal information is disclosed to third parties for targeted advertising. Two plain points to close on. State privacy laws can reach further than COPPA does, and shipping an app does not discharge a legal duty. If you are not sure whether COPPA covers yours, that is a question for a lawyer.

FTC, Complying with COPPA: Frequently Asked Questions

Makeups and waitlists are most of the work

Swim schools mostly do not sell courses. They run a standing arrangement: the same slot every Tuesday at quarter past four until the child moves up or leaves. That is one enrolment with a register attached, and modelling it as repeated bookings makes every later question awkward.

An absence turns into a makeup credit, and those rules are the most argued about thing in the building. Write yours down before you build: how long a credit lasts, how many a family may bank, whether it can only go into a class at the same level with a free place, whether credits survive a withdrawal, and whether a lesson the school cancelled counts differently from a child with a cold. Bought software has already picked answers you may disagree with.

Money follows the arrangement rather than the visit, which is why the billing side has more in common with a membership management app than with a shop. Families are charged monthly whether or not the child swam. The fields that generate phone calls are holds, the exact date a pause starts and ends, sibling discounts, and what happens to an unused credit over the summer.

The waitlist is where the growth hides. A school that knows twelve families want Thursday at five knows what to open next term. An entry worth keeping records the swimmer, the level, the days that work and the date they asked.

Who sees which child

Four groups use this app and none of them want the same screen. A parent wants their own children, the next lesson and the credit balance. An instructor on deck wants one class list, which is why a swim instructor app is a different app in everything but name. A supervisor wants the whole session across every lane, and the office wants attendance and money.

Notes that go home are the same shape of problem as a parent teacher communication app: a short note attached to a person, visible to the right adult, and kept. Photographs are where a swim school gets into trouble fastest. Apple's App Store Review Guidelines say an app that collects, transmits or can share personal information from a minor must include a privacy policy and comply with all applicable children's privacy statutes, and photos and videos are named in that list. Apple also notes that a parental gate is generally not the same thing as parental consent to collect personal data.

That leaves one rule the whole design rests on, which is a parent seeing only their child. It has to hold on the server, not in the screen that leaves the other names out. This page stops short of how you enforce it, because the answer is the same for every app that mixes several families into one class.

Apple, App Store Review Guidelines, section 5.1.4 Kids