Fitness apps

Fitness App Features: What Version One Needs, by Type of Fitness App

A trainer booking app, a multi studio class app, a workout content app and a gym member app share a category but need different features to launch. This guide lists what each type needs in its first release, what can wait, and the few features that are expensive to add later.

Thomas Siudut
Thomas SiudutCo-Founder and CEO, Apps Value
September 26, 20269 min read
FitnessProduct scopeMVP
Short answer

Every fitness app needs onboarding with fast sign in, accounts, notifications, a way to pay and an admin panel. Beyond that, the features depend on the type of product: trainer apps need a calendar that handles rescheduling, class and multi studio apps need capacity and membership rules, content apps need a program library and in app subscriptions, and gym apps need booking, membership status and check in. Wearables, social feeds and gamification can usually wait until after launch.

Key takeaways for fitness founders

  • Start from the type of product, not a feature list. The same feature can be essential for one fitness app and irrelevant for another.
  • Booking rules are the hard part. Capacity, cancellations and rescheduling take more time than any screen and are costly to change later.
  • The first minutes decide adoption. Onboarding and one tap sign in matter as much as the core feature.
  • Wearables rarely decide a launch. They are valuable, but they are seldom why a member books or pays.

Features every fitness app needs

Whatever the product, a handful of features appear in every first release. They are not the reason members choose the app, but without them the reason never gets a chance.

  • Onboarding and sign in. A short path from install to a registered account, with Sign in with Apple, Google sign in or a phone number. We built exactly this part for Body Vibes, a fitness class booking app, in about a month inside its existing Flutter app.
  • One account per person. Several sign in methods must lead to the same member, or people lose bookings and subscriptions they paid for. On Body Vibes there have been no duplicate accounts since release.
  • Notifications. Reminders before a session and alerts when something changes. For booking products they carry real value, so they belong in version one.
  • Payments or a subscription. Real world sessions and digital content follow different store rules, which decides how the app can charge. Our guide to subscription app development covers the decisions behind it.
  • An admin panel. The team running the product needs to manage users, content and schedules without asking developers.
Row of dumbbells in a gym, representing the fitness products a mobile app can support

Features by type of fitness app

Most feature lists for fitness apps mix four different products. Splitting them by type makes the first release smaller and the quote more accurate.

Personal trainer and coaching apps

One trainer, many clients, and sessions that move when real life gets in the way. The product lives or dies on the calendar.

Version one
  • Trainer profiles with specialty and availability
  • Slot booking with double booking blocked
  • Rescheduling and cancellation rules
  • Chat between trainer and client
  • Payments or a subscription for clients
Can wait
  • Workout plans and progress tracking
  • Loyalty rewards
  • Group sessions
  • Wearable data

Class booking and multi studio apps

Many venues, a shared schedule and a membership that works across them. The rules behind the membership matter more than any single screen.

Version one
  • Schedule with filters by activity and area
  • Booking with capacity per class
  • Membership or package logic
  • Check in at the venue
  • Admin panel for schedules
Can wait
  • Self service for partner venues
  • Integrations with every venue system
  • Reviews and ratings
  • Social features

Workout content and on demand apps

Programs and videos the member uses inside the app, usually sold as a subscription. Store rules for digital content apply here.

Version one
  • Program library with clear structure
  • Video playback that works on weak connections
  • Subscription through in app purchase
  • Progress through a program
Can wait
  • Live classes
  • Community feed
  • Personalised plans generated per member
  • Wearable integrations

Gym and studio member apps

An app for members of one operator: bookings, membership status and communication in the operator's own brand.

Version one
  • Class booking for the operator's venues
  • Membership status and renewals
  • Check in at the door
  • Push notifications for changes
Can wait
  • Personal training add ons
  • Shop and merchandise
  • Challenges and leaderboards
  • Integrations with gym equipment

The features that decide a fitness launch are rarely the impressive ones. They are the booking rules, the first minutes in the app and the way members pay.

A fitness app built feature by feature: Evesport

Evesport is a Flutter app we built from scratch for personal trainers and their clients. It shows which features carry a trainer booking product in practice: a client home with trainers filtered by city and specialty, a real weekly calendar with double bookings blocked, chat with voice messages and photo sharing, and Basic and Premium plans for clients while trainers use the app for free.

Fitness app booking screen with a trainer's weekly calendar in Evesport
Fitness app session swap screen in Evesport

Two features came out of real use rather than the original list. Session swapping lets a client who cannot attend offer the slot to others training with the same trainer, so the trainer keeps a paid session. The case for it, and the double booking edge cases, surfaced when trainers from top gyms ran real sessions through the app with their own clients before launch.

Evesport went from kickoff to launch in 20 weeks, and bookings grew 18% in the first 60 days. The Evesport case study walks through every feature.

Features that are expensive to add later

Some features can be added in any release. Others change the data model, and adding them after launch means rework on live data. These are worth deciding before design, even if they ship in a simple form.

  • Booking rules. Capacity, cancellation windows, rescheduling and what happens to a paid session that is missed.
  • The payment model. Per session, packages, subscriptions or a mix, and which side of the market pays.
  • Roles. Whether trainers, studios or staff get their own tools, and what each role can see.
  • The account model. One account per person across every sign in method, and how access moves between devices.

If you are planning a first release, our page on MVP development for startups describes how we scope it, and the guide on how to build an app like ClassPass goes deeper into multi studio products.

Features that usually wait

  • Wearables and health data. Apple Health and Google Fit add depth, but they are seldom why a member books or pays. Scope them per project once the core works.
  • Social feeds. A feed needs activity to look alive. At launch it is usually empty.
  • Gamification. Badges and streaks help retention later. A simple reward can be enough at first: Evesport clients show a personal QR code at the start of a workout, and the trainer confirms attendance and awards loyalty points.
  • AI coaching. Personalised plans need data about members that a new app does not have yet.

About the source

Who is answering this?

CompanyApps Value, mobile app development agency
LocationKraków, Poland
Markets servedUnited States, Western Europe, Nordics
Experience6 years, 19+ projects delivered, 13+ positive client reviews
TechnologiesFlutter, React Native, NestJS, Supabase, PostgreSQL, AWS, Google Cloud
Engagement modelsFixed price contracts and dedicated development teams

FAQ

What features should a fitness app have?

Every fitness app needs onboarding with fast sign in, one account per person, notifications, a way to pay and an admin panel. The rest depends on the type: trainer apps need booking and rescheduling, class apps need capacity and membership rules, content apps need a program library, and gym apps need booking, membership status and check in.

What features should a fitness app MVP include?

Only the features the core use case cannot work without, plus the ones that are expensive to change later: booking rules, the payment model, roles and the account model. Wearables, social feeds and gamification can usually wait.

Does a fitness app need Apple Health or Google Fit integration?

Not for most first releases. Health data integrations add value for tracking and coaching products, but they rarely decide whether a member books or pays, so they are usually scoped after the core works.

How long does it take to build a fitness app?

Evesport, a fitness booking app we built from scratch, took 20 weeks from kickoff to launch. Adding features to an existing app is faster: the onboarding, sign in and paywall for Body Vibes took about a month. Our article on the mobile app development timeline shows where the weeks go.

How much does it cost to build a fitness app?

It depends on the type of product, the number of roles and the booking and payment rules in the first release. Our pricing page explains how we scope and price fixed price projects.

Can you add features to a fitness app that is already live?

Yes. For Body Vibes we added a new onboarding, sign in and paywall inside the client's existing Flutter app as a regular release. Our fitness app development page covers the work we take on.

Thomas Siudut, Co-Founder and CEO of Apps Value
Written by Thomas Siudut Co-Founder and CEO, Apps Value

Thomas sets the company's long term strategy and direction, identifies market opportunities, and owns business development and client acquisition. He builds strategic partnerships that last beyond a single project. He works with clients from the first strategy conversation, so their business goals, not just their feature list, drive every decision.

Planning a fitness app?

Whether you are starting from scratch or adding features to an app that is already live, we can scope it with you and give you a fixed price.

30 minutes, no preparation needed.