Fitness App Development

Plan, Architecture, Costs

In mobile app development and healthcare IT since 2005, ScienceSoft builds world-class wellness apps with resilient architecture and engaging UX.

Fitness App Development - ScienceSoft
Fitness App Development - ScienceSoft

Fitness Apps: The Essence

The key goal of fitness app development is to meet the ever-growing demand for easy-to-use, accessible apps that help people maintain physical and mental wellness. Varying from fitness tracking, workout guidance, and nutrition planning to mindfulness solutions, fitness apps make a big difference in their users' everyday lives.

  • Key steps: business analysis, requirements engineering and planning, UX/UI design, development and testing, release and maintenance, continuous evolution.
  • Team: project manager, business analyst, solution architect, developers, QA specialists, DevOps engineer, regulatory compliance expert (optional).
  • Costs: from $50,000 for an MVP and up to $600,000 for a full-featured product, depending on the chosen feature set and development method (native, cross-platform).

With a passionate team of experienced mobile developers and healthcare IT consultants, ScienceSoft provides end-to-end development of fitness apps. We offer business analysis, design, coding, testing, support, and evolution of fitness apps of any complexity.

The Fitness App Market

The global fitness app market was estimated at $1.1 billion in 2021 and is expected to grow sixfold within the following decade, reaching a valuation of $8.1 billion by 2032. The surge in demand for fitness apps is associated with the COVID-19 pandemic that raised public awareness of healthy lifestyle and affected brick-and-mortar fitness businesses.

Key Features of a Winning Fitness App

Having delivered over 350 successful mobile apps we fully understand the value of thought-out functionality. Below, ScienceSoft's consultants outline the most demanded fitness app features in 2023:

Fitness tracking

  • Manual and automated activity logging: e.g., steps taken, heart rate, calories burned.
  • GPS tracking (mapping out the route, calculating the pace and the distance traveled).
  • Nutrition logging and calculating the calorie intake by entering the meals manually, choosing foods from the in-app list, or scanning food barcodes.
  • Sleep tracking.
  • Period and pregnancy tracking.
  • Mood logging and journaling.
  • Lifestyle tracking (e.g., physical and mental rest, habits, sexual activity, and more).
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Personalized user experience

  • User profile personalization (logging in age, height, weight, preferred activities to create a tailored fitness plan).
  • Goal setting and progress tracking with daily/weekly/monthly reports.
  • Custom workout and nutrition plans tailored to a user's fitness level, preferences, and goals (e.g., weight loss/gain, muscle building, regular physical activity).
  • Push notifications and reminders to log in your daily activities and compensate for the missed ones.
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Training and education

  • Pre-recorded, animated, or illustrated workout sessions for an activity of choice (e.g., yoga, workout using gym equipment, stretching).
  • Meditation, breathing, and other mental health exercises in a video, audio, or written format.
  • Real-time one-on-one video sessions with trainers, meditation teachers, or nutritionists.
  • Articles, FAQ guides on a healthy lifestyle.
  • AI chatbot providing recommendations based on users' goals, logged-in activities, etc.
  • Information on nearby healthcare and fitness organizations.
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  • Synchronization with social media (e.g., for sharing fitness achievements with friends, logging in via social media accounts).
  • Gamification: in-app competitions with daily/weekly/monthly challenges, progress levels, and unlockable rewards like profile badges, discounts, free access to premium content, etc.
  • Information about and notifications of a user's friends' recent activity and fitness achievements, peer support.
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Billing and payment

  • Secure payment gateways to accept in-app payments (for premium functionality, individual training sessions, etc.) through different channels (e.g., a card, Google Pay, Apple Pay).
  • User invoicing and automated sales tax handling.
  • Handling payment failures.
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Sample Fitness App Architecture

Below, ScienceSoft's mobile app experts outline the key building blocks of a microservices-based fitness app architecture and describe its key components.

Sample Fitness App Architecture - ScienceSoft

  • Presentation layer is the app’s UI, the central point of user interaction. For fitness apps that accommodate different user roles (e.g., trainee, trainer, admin), different UIs with corresponding user access rights are created.
  • Routing layer serves as an intermediary between the front end and the back end, ensuring a smooth and secure exchange of data.
  • Container ecosystem is the app's back end that consists of several microservices and their respective databases, one for each primary module of the app.


Microservices in detail

  • User's profile microservice collects and stores user data. Communicating with the payment microservice, it verifies a user's payment status (if applicable) and enables access to premium content or paid app features.
  • Nutrition microservice helps log daily food and water intake, calculating the nutritional value of meals by choosing foods from the nutrition database or scanning a food item's barcode, etc.
  • Training microservice contains the workout sessions and mental health exercises provided by the app. It allows users to choose their preferred activities and workout difficulty level, log their training sessions, track fitness progress, and more.
  • Education microservice is designed to encourage the users' interest in fitness-related topics and provide comprehensive information about a healthy lifestyle in an easy-to-digest format.
  • Goals microservice helps users keep up with their fitness goals, reminds them about missed activities, and encourages new accomplishments with push notifications.
  • Recommendations microservice collects comprehensive data about a user's goals and activities from all the microservices to generate personalized recommendations and a tailored fitness program. Relevant tips might be provided with an AI chatbot that sends notifications to the user.


Head of Mobile Development at ScienceSoft

Independent modules are easy to deploy, scale, and modify, making microservices a perfect option for complex fitness apps that are likely to evolve with new features in the future.

Fitness App Development Roadmap

Below, ScienceSoft's experts share the key steps common for most fitness app development projects. This plan can be easily adapted to fitness app types, unique feature sets, etc.

Discovery stage

  • Setting business goals to be achieved with the future app (e.g., filling a market niche, promoting fitness products or services, etc.), define the expected goals to conceptualize the fitness product.
  • Examining the target market segment and the competitors' offerings.
  • Identifying the target audience and creating empathy maps to pinpoint potential users' pains.
  • Identifying the app's compliance needs (e.g., HIPAA, GDPR).
  • Developing a business case for the app, including the development cost and ROI estimations.

In most cases, fitness apps fall under the FDA requirements for low-risk devices as they are designed for general wellness use only, have no relation to diagnosing, curing, or preventing diseases and pose no risk to users’ safety. If your app fits this description, it will not require FDA submission.

Healthcare IT Consultant at ScienceSoft

Requirements engineering and architecture design

  • Creating a high-level vision of the fitness app by outlining:
    • The app's purpose (e.g., an exercise guide, a fitness tracker, a nutrition advisor) and its competitive edge.
    • The core feature set and integrations (if applicable).
    • Functional and non-functional requirements, including security and compliance requirements.
    • App monetization model (a paid app, in-app purchases, ads, etc.).
  • Choosing the mobile platform (iOS, Android, both).
  • Designing the optimal mobile app architecture.
  • Selecting the best-suited back end technology stack.
  • Creating a detailed software requirements specification (SRS).

Head of PMO at ScienceSoft

Project planning

  • Preparing a comprehensive project plan with time frames, required resources, and budget.
  • Deciding on a project management approach (Scrum, Kanban, etc.).
  • Defining clear and tangible KPIs (team velocity, deployment frequency, code quality, etc.) to assess the project's health and progress.


UX and UI design

  • Conducting UX research to understand behavior of potential users and prioritize the development steps.
  • Creating user personas and user scenarios (the patterns of how each persona interacts with the fitness app).
  • Building UX wireframes or mockups that illustrate the interaction flows.
  • Conducting multi-round UX testing to eliminate any potential issues and make the navigation intuitive.
  • Creating a distinctive visual identity and fitness app design concept.
  • Turning mockups into UI prototypes.
  • Presenting UI prototypes to the project stakeholders, making the needed adjustments until the prototypes receive the stakeholders' approval.


Development and testing (iterative)

  • Setting up the development and delivery automation environments (CI/CD, container orchestration, etc.).
  • Developing the server side of the system and the APIs, using secure coding practices.
  • Developing the client side of the system: creating a full-fledged UI based on UI prototypes, setting up network communication, integration with databases.
  • Implementing security features (e.g., data encryption, MFA, etc.).
  • Integrating the app with third-party wearable devices, social media platforms, payment gateways, etc. (if applicable).
  • Conducting end-to-end testing in parallel with development, including functional, performance, security and compliance, compatibility, and accessibility testing.
  • For apps that collect PHI: Conducting a HIPAA compliance pre-audit.


Release and maintenance

  • Uploading the fitness app to the chosen mobile store(s).
  • Selecting monitoring tools and setting up performance alerts to immediately detect and resolve availability and performance issues.
  • Establishing support and maintenance procedures to ensure smooth operation of the fitness app: releasing updates to ensure full compatibility with new OS versions, addressing user issues, optimizing cloud resource consumption to reduce cloud fees, etc.


Continuous evolution

Adjusting the solution to meet the evolving business needs:

  • Rolling out new app features (including those powered by advanced techs like AR, IoT, AI/ML, etc.).
  • Developing new integrations with other apps and services.
  • Refining the UX/UI according to user feedback and new trends in the fitness industry.
  • Implementing the most recent security measures and more.


Consider Professional Fitness App Development Services

ScienceSoft can design, develop, and support a highly engaging fitness app or assist you at any stage of your mobile development project.

Fitness app consulting

ScienceSoft's experts are ready to lay a solid foundation for the success of your fitness app. We will conduct competition analysis, help conceptualize the fitness app, differentiate your product among the competitors, help decide on techs, design UX and UI.

I need this!

End-to-end fitness app development

ScienceSoft's team will analyze the needs of your target users, study your market competitors, define a winning feature set, create an optimal architecture, design a sleek UI, code the app, and provide comprehensive QA. After the app is launched, ScienceSoft is ready to stay with you for its long-term support and evolution.

I need this!

Why Your Fitness App Project Is Bound for Success with ScienceSoft

  • In mobile app development and healthcare IT since 2005.
  • 350+ successful mobile projects, including the Android version of Rakuten Viber, apps that power global brands (MTV, T-Mobile, KFC, Fox Entertainment), and Deloitte-approved banking apps.
  • Hands-on experience with HIPAA, GDPR regulations.
  • Strong Agile and DevOps culture.
  • ISO 9001 and ISO 27001-certified to guarantee a robust quality management system and ensure the security of the customers' data.
  • Quality management system for medical device software proven by ISO 13485.
  • For the second straight year, ScienceSoft USA Corporation is listed among The Americas’ Fastest-Growing Companies by the Financial Times.

Selected Fitness App Development Projects by ScienceSoft

Mobile App for Heart Rate Tracking

Mobile App for Heart Rate Tracking

  • End-to-end implementation of a native iOS app that helps assess users' physical state before, during, and after a fitness session.
  • Immediate interpretation of heartbeat data from the heart monitor, displaying the results on a handy three-colored chart.
  • Widely used by US healthcare and military organizations to improve patients' well-being and monitor the training progress.
Healthy Food Mobile App

Healthy Food Mobile App

  • Development of engaging iOS and Android apps that help users accurately assess their food's nutritional value: calories, protein, carbs, fat, cholesterol, sodium, and the glycemic index.
  • Actionable recommendations on an optimal diet according to a user's blood type: the app identifies food that is beneficial for intake (indicated green), neutral (yellow), or not good for their blood type (red).
MVP Platform for Patients with Obesity

Startup MVP Platform for Patients with Obesity

  • End-to-end development of a HIPAA-compliant mobile MVP that helps patients to eat a healthy diet, prepare for and recover from a bariatric surgery.
  • Calories counting, generating personalized suggestions with AI engine, instant messaging, gamification.
  • Empowering healthcare practitioners with real-time access to patient health data (weight, calorie consumption, physical activity) and progress reports.

Our Customers Say

Talents that Make Up Our Fitness App Development Teams

Project manager

Devises a project plan and manages the team; ensures full compliance with the SLA; reports to the stakeholders on the project progress.

Business analyst

Researches the fitness app market and competitors; elicits functional and non-functional requirements; outlines the feature set and the required integrations with third-party devices (if any).

Mobile architect

Designs the optimal fitness app architecture and the required integrations with third-party devices; chooses the best-suited tech stack.

UX designer

Investigates the needs and expectations of the fitness app's users; assists the business analyst in preparing the app's requirements specification; creates user personas and interaction patterns; builds UX wireframes and participates in UI creation.

UI designer

Designs an attractive and intuitive visual interface of a fitness app; cooperates with the UX designer and the developers to ensure easy navigation within the app and high user engagement; participates in discussing the UI prototypes with project stakeholders.

DevOps engineer

Sets up the fitness app development infrastructure; introduces CI/CD pipelines to automate development and releases; monitors the app's security, performance, availability, etc.

Mobile developer

Cooperates with designers to work out sleek GUI elements, codes the app and fixes the defects reported by the QA team.

Back-end developer

Builds the server side of the fitness app and establishes secure data exchange among the app's modules; fixes the defects reported by the QA team.

QA engineers and testers

Work out a test strategy and a test plan based on the app requirements; design test scenarios and test cases; set up the testing environment and run the tests; introduce test automation (if feasible); report on the detected issues; validate bug fixes.

Note: Depending on your project specifics, ScienceSoft can involve additional talents. For example, your fitness app collects personal health information and shares it with healthcare providers and insurance companies. In this case, a regulatory consultant will join the team to ensure the app's compliance with HIPAA and prepare the relevant documentation for an OCR audit.

Key Sourcing Models for Fitness App Development

Technologies We Use

Mobile development languages and key toolkits

Programming languages


ScienceSoft leverages the inherent conciseness of Swift and creates lightweight iOS apps that are easy to maintain.



25 years





ScienceSoft's Java developers build secure, resilient and efficient cloud-native and cloud-only software of any complexity and successfully modernize legacy software solutions.

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With Kotlin, ScienceSoft can create 20–50% shorter code for Android apps and ensure fast app development and cost-effective code maintenance.



19 years





Our C# developers created the world’s largest PLM software. Their recent projects: development of SaaS for vCIO services management and underwriting software for a global aviation insurer.



21 years





ScienceSoft uses JavaScript’s versatile ecosystem of frameworks to create dynamic and interactive user experience in web and mobile apps.

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Environments and frameworks



11 years





ScienceSoft cuts the cost of mobile projects twice by building functional and user-friendly cross-platform apps with Xamarin.

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Apache Cordova

ScienceSoft uses Cordova to create cross-platform apps and avoid high project costs that may come with native mobile development.

React Native


8 years



ScienceSoft reduces up to 50% of project costs and time by creating cross-platform apps that run smoothly on web, Android and iOS.

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ScienceSoft will save you from double or even triple expenses associated with platform-specific coding by creating cross-platform apps in Flutter.


With Ionic, ScienceSoft creates a single app codebase for web and mobile platforms and thus expands the audience of created apps to billions of users at the best cost.

Back-end programming languages

Microsoft .NET


19 years





Our .NET developers can build sustainable and high-performing apps up to 2x faster due to outstanding .NET proficiency and high productivity.

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25 years





ScienceSoft's Java developers build secure, resilient and efficient cloud-native and cloud-only software of any complexity and successfully modernize legacy software solutions.

Find out more


10 years





ScienceSoft's Python developers and data scientists excel at building general-purpose Python apps, big data and IoT platforms, AI and ML-based apps, and BI solutions.

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10 years



ScienceSoft delivers cloud-native, real-time web and mobile apps, web servers, and custom APIs ~1.5–2x faster than other software developers.

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16 years





ScienceSoft's PHP developers helped to build Viber. Their recent projects: an IoT fleet management solution used by 2,000+ corporate clients and an award-winning remote patient monitoring solution.

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4 years

ScienceSoft's developers use Go to build robust cloud-native, microservices-based applications that leverage advanced techs — IoT, big data, AI, ML, blockchain.

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Databases and data storages

Amazon Redshift

We use Amazon Redshift to build cost-effective data warehouses that easily handle complex queries and large amounts of data.

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Amazon DynamoDB

We use Amazon DynamoDB as a NoSQL database service for solutions that require low latency, high scalability and always available data.

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Azure SQL Database

Azure SQL Database is great for handling large volumes of data and varying database traffic: it easily scales up and down without any downtime or disruption to the applications. It also offers automatic backups and point-in-time recoveries to protect databases from accidental corruption or deletion.

Azure Cosmos DB

We leverage Azure Cosmos DB to implement a multi-model, globally distributed, elastic NoSQL database on the cloud. Our team used Cosmos DB in a connected car solution for one of the world’s technology leaders.

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Google Cloud Datastore

We use Google Cloud Datastore to set up a highly scalable and cost-effective solution for storing and managing NoSQL data structures. This database can be easily integrated with other Google Cloud services (BigQuery, Kubernetes, and many more).




CI/CD tools

Monitoring tools

Creating Innovation Opportunities With Advanced Techs

We're ready to deliver an app that goes beyond the regular fitness tracking functionality. Turn to ScienceSoft to create a one-of-a-kind product powered by advanced techs:

How Much Does It Cost to Develop a Fitness App?

The total cost of a fitness app development project highly depends on the chosen feature set, the development method (native, hybrid, or cross-platform), and the sourcing model (in-house or outsourced). It may vary as follows:


For a native fitness app MVP with simple features like GPS tracking and diet planning.


For a cross-platform workout app with personalized user experience, goal setting, progress tracking across various modules, etc.

Up to $600,000

For a high-end native fitness app with advanced features like live streaming, AI chatbots, AR, etc.

About ScienceSoft

ScienceSoft is a global IT consulting and software development company headquartered in McKinney, TX. With 18-year experience in mobile development, we design and implement highly engaging fitness apps that users love. In our projects, we employ a robust quality management system and guarantee the security of our customers' data in accordance with ISO 9001 and ISO 27001 requirements.