The best app builder for gyms is usually the one that already bills your members.

Recurring billing decides this, not the screens

Every gym app does roughly the same four things. Show the timetable, take a booking, check someone in, and show what they owe. Three of those are a couple of weeks of work. The fourth is a payments product. It needs a stored card, a renewal date, proration for someone who joins on the 14th, a retry when the card fails, a freeze for the member with a torn hamstring, and a cancellation that stops the charge without erasing the history.

That is why the market splits so cleanly. Gym management platforms were built around that ledger and added an app later. App builders were built around screens and added payments later, usually by pointing at somebody else. Neither choice is wrong. They answer different questions, and most people reading this have the first one.

There is also a rule that catches gyms late. Google Play's payments policy lists the cases where Play billing must not be used, and gym memberships appear in it by name, as a physical service alongside transport, cleaning and live event tickets. The same policy lists subscription services, fitness among its own examples, as in-app purchases that must use Play billing. Apple draws the same line from the other side. Your dues belong on a card through a processor you control. An on demand video library is the opposite case, and it is worth knowing which one you are selling before you pick a tool.

Google Play Console Help, Payments policy, on gym memberships and in-app purchases

Which tools bill memberships, and which hand you to Stripe

PushPress publishes a processing rate next to each plan on its pricing page: a free tier at 4.99% plus 30 cents per card payment, Pro at $159 a month with 2.89% plus 30 cents, and Max at $229 a month with 2.75% plus 30 cents. Recurring membership payments, class scheduling and check in are part of the platform, and the white labelled Branded App is an add-on its own FAQ prices at $81 to $97 a month. Zen Planner starts at $99 a month, lists automated billing and payment processing in every package, says it works with preferred processors including its in-house Daxko Payments, and prices a branded member app at $39 a month.

ABC Trainerize is the personal trainer app maker in this group rather than a gym platform, and it is honest about where the money moves. Its pricing page puts Stripe Integrated Payments in a $10 a month add-on, included on Studio plans, and describes one off or recurring payments through your own connected Stripe account. The white labelled Custom Branded App is a one time $169 setup fee on Pro and included on Studio. A free tier covers one client, and paid plans start at $10 a month for two.

General builders are where the answer thins out. GoodBarber's membership page describes recurring subscriptions bought through the payment systems built into the App Store and Google Play, which is exactly the rail a gym membership is not allowed to use. Glide's own Stripe page, in its Classic docs, describes a single action, Send Invoice, and adds that Glide does not automatically show whether an invoice has been paid. FlutterFlow documents two routes, a Trigger Stripe Payment action and RevenueCat for in-app subscriptions, and the RevenueCat route means a separate account, store products and entitlements before anyone is charged a penny.

None of that makes them bad tools. It means the billing becomes your project rather than theirs. If you go that way, write the whole lifecycle down before the first screen, because a gym membership app lives or dies on the unglamorous half: joining, freezing, failing, leaving and coming back.

Choose by what you are selling

Three different readers land on this page. The gym with a front desk, a timetable and 200 members wants a platform, because the app is the cheapest thing it needs. The coach with 30 online clients wants a coaching platform, because programming and check ins are the product being sold. The owner with a model nobody else sells wants a custom build, and deserves a clear view of the work involved.

The useful test is whether your business is ordinary in software terms. If a membership plan, a class schedule and a check in screen describe your week, you are buying software that already exists, and the branded app is a line item rather than a project. That logic reaches well past fitness, which is why the best app builder for small business question usually lands in the same place. The vertical tool beats the general one until it does not.

What flips it: a rewards or community model no platform supports, door hardware you own, a multi site structure the per member pricing punishes, or a member experience you want to design rather than configure. Those reasons are real and worth building for. They are also worth raising with the platform first, because configuring beats building every time configuring is possible.

If you do build it, here is what you are taking on

A custom gym app is two products wearing one name. The first is the member app: timetable, booking, check in, profile, maybe a workout log. The second is the business behind it: plans, prices, freezes, refunds and the report that says what came in last month. The first is a few weeks. The second is the one that gets underestimated, and it is the one members phone you about.

The store rules are friendlier here than most people expect, and more specific. Apple's guidelines allow payment outside in-app purchase for real time person to person services between two individuals, and fitness training is one of the examples they give. One to few and one to many real time services must use in-app purchase, so a streamed group class is not the same case as a private session. Services consumed outside the app also have to be collected another way, such as Apple Pay or ordinary card entry. Digital content is the reverse: unlocking a video library inside the app is in-app purchase, and an auto renewable subscription has to run at least seven days and work on every device the member owns.

Newly is one way to do the building half. You describe the app in plain English and it writes a React Native and TypeScript project you own, runs it on cloud iOS and Android simulators, and ships it to TestFlight and to Google Play internal testing. It has no membership engine of its own, so the recurring side is work you specify rather than a feature you switch on, and the order to do it in is a separate piece on memberships and billing.

Apple, App Review Guidelines, section 3.1 Payments, including 3.1.2, 3.1.3(d) and 3.1.3(e)