Top 10 fitness app development companies in USA

Quick comparison of the top vendors in 2025

To create this list, we dive deep into each company’s offers and directly hear from their past client’s reviews to identify the most qualified ones. 

However, this list does not necessarily rank each company from the top. As each company may thrive in a specific fitness app and technology, it’s better to learn the details about them before jumping to any conclusions. 

Company	Best for	Talent pool	Rating	Price
Synodus	Cost-effective & strategic development for fitness startups	250+	5/5 (42)	$25/hr
Jafton	Agile-based fitness app development	120+	4.8/5 (123)	$50/hr
Emerline	Fitness MVP development	700+	4.9/5 (25)	$50/hr
Science Soft	Enterprise	750+	4.8/5 (39)	$50/hr
Moon Technolabs	Cloning fitness app and MVP development	300+	4.9/5 (33)	$25/hr
Techahead	Fitness training and tracking app	200+	4.7/5 (97)	$25/hr
Quytech	Personal training app	300+	4.7/5 (105)	$25/hr
Code Brew Labs	Wearable, AR/VR fitness app	250+	4.4/5 (48)	$50/hr
Kaizen Softworks	Nearshore staffing for fitness business	50+	4.9/5 (10)	$50/hr
Apptunix	Staff augmentation for fitness business	<400	4.1/5 (50)	$50/hr

Detailed review: Info, Pros & Cons, Case study

Learn about each company’s best aspect and make the decision yourself. 

Synodus – Cost-effective fitness app development for USA

Unlike other vendors on this list, Synodus doesn’t have office in the US, yet having served many US-based clients, from large to early-stage startups. Their client-centric offshoring approach and working-around-the-clock method has helped them earn the heart of over 100 clients, including Fortune 500 companies like KPMG and BOC Aviation. 

With development center based in Vietnam, Synodus offer both qualified tech teams and cost-effective rate that benefit startups. But that’s not all. The team takes business analytics extensively to understand your needs, validate the right technologies, and even consult on MVP development and first-launch strategy.  

In fitness app development, they can also embed AI/ML, Blockchain, IoT, and Big Data to make your apps well-functional and high performing. This is what users love best. 

Fitness app they can build: 

• Personal training & Coaching app: Gym, Yoga, Sports. 
• Client management solutions for trainers and coaches. 
• Fitness and activity tracking app. 
• Wellness and meditation app. 
• Diet and nutrition apps. 

Other information: 

• Completed project: 100+ apps. 
• Tech stack: JavaScript, C#, .NET, Node, Flutter, Angular, Python. 
• Clients: CoralApps, BOC Aviation, KPMG. 
• Qualification: HIPPA, GPDR, HL7, ISO 27001, ISO 9001. 

Pros & Cons of working with Synodus (from clients): 

• The team can deliver 3x times faster using a combination of Waterfall and Agile. 
• Plus, they can support startups with 3-days MVP development. 
• They used Fixed Cost instead of T&M, which many clients support since it fightbacks cost overrun. One client even saved up to 63% of development cost. 
• Quick onboarding process in 48 hours, working around the sun to fully support remote clients, and transparent communication as all their developers are well-versed in English. 
• The team actively supports startups and enterprises as a tech partner, leading to an average of 3 years of partnership. 
• Distance and time zone difference are the biggest setbacks when working with Synodus. Despite that, their technical expertise and project management skills are decent. 

Notable case study: 

Working with CoralApp, Synodus helped them optimize app performance, build new features, and redefine UI/UX design in their post-funding. Specifically, Synodus updated Blockchain and AI features to improve fitness tracking, making it more attractive to end users. 

Jafton – New York

As a top-rated AI-driven mobile app development company by Forbes and Clutch, Jafton is among the best choices on this list. Their focus on mobile development allows the team to leverage a wide range of mobile technologies, working around any use cases and industries, including fitness apps. 

Their development process relies on Agile, guiding you through initial discussion to post-release maintenance. They can also help with validating your product through MVP, A/B testing, and pre-launching. 

Fitness app they can build: 

• Workout (Gym, Yoga, Sports) apps. 
• Fitness subscription apps. 

Other information: 

• Years of experience: 11+. 
• Clients: Allbirds, Kroger, Chevron, Jokr, Preipo. 
• Tech stack: Kotlin, PHP, JavaScript, Flutter, Angular, Objective C. 

Pros & Cons of working with Jafton (from clients): 

• The team truly showed their technical proficiency in app optimization and customization, as well as building AI-powered mobile apps. 
• They can seamlessly integrate with the client’s team, leading to efficient project management. 
• However, their pricing can be higher than some vendors on this list. Some clients noted a difference between final total cost with upfront cost estimation, wishing there should have been a clearer plan. 

Notable case study: 

Jafton developed Fitness Uncensored, a subscription app that users can use to pick personalized programs from fitness influencers and qualified coaches. This simple app quickly got a 4.4/5 stars rating in App Store and Google Play. 

Emerline – Miami

One thing that growing Silicon Valley startups and Fortune businesses love about Emerline is their commitment to deliver a functional MVP under 15 weeks. Focus on working with startups, Emerline supports them in every stage, from product research to full-fledge development.  

In fitness app development, they can work with complex features such as Geolocation tracking, Altitude measurement, Chatbot integration, AI and blockchain-powered function. 

Fitness app they can build: 

• Fitness & workout apps. 
• Yoga & meditation apps. 
• Activity tracking apps. 
• Social fitness apps. 
• Gym & personal training apps. 
• Nutrition & diet apps. 

Other information: 

• Completed projects: 400+ in total.  
• Tech stack: Django, .NET, Python, JavaScript, ASP.NET, C++. 
• Clients: FUCHs, Midday, CPG Data. 

Pros & Cons of working with Emerline (from clients): 

• A 3-day onboarding process with business analytics to help them seamlessly integrate with the in-house team. 
• The team is very effective in project management.  
• Emerline is creative in suggesting UI/UX and features enhancements. Some clients have passed 2 investment rounds with them. 
• Despite having a large team of 700+ developers across the US and EU, some clients found it hard to scale their team, which eventually affects project deadlines. 

Notable case study: 

Involved in the development of Midday – a menopause tracking app, Emerline planned and built mood tracking features, with analytics to find symptoms and signs. 

Science Soft – Atlanta

Having over 35 years of experience in software development, Science Soft is another prominent name for fitness app development in Atlanta and Texas. They mostly work with enterprises and fast-growing startups, with strength in product engineering and consultation. 

Promise to deliver engaging UX fitness app with strong microservices backend, Science Soft surely known how to handle the most complex requirements. They also help to define product roadmap and perform market analysis, a perfect add-on if you want to validate your fitness apps. 

Fitness app they can consult and build: 

• Fitness tracking apps. 
• Personalized fitness training apps. 
• Fitness community and social apps. 

Other information: 

• Completed projects: 150+ Healthcare-related projects. 
• Tech stack: Java, Kotlin, C#, HTML, CSS, Python, Golang, Firebase, Amazon. 
• Clients: TriadXP, Health Group, IntelleWave, Peekaboo. 
• Qualification: FDA, HIPAA, GDPR. 

Pros & Cons of working with Science Soft (from clients): 

• They are praised for high skill that can handle a wide range of industries and technologies. 
• The team is very effective in project management. 
• Their development team is in India, which can cause time zone difference and language barrier. 

Notable case study: 

With the goal of increasing user engagement, Science Soft worked with a US startup to redefine their fitness app. The scope ranges from UI/UX audit to deploy new features. 

Moon Technolabs – Chicago

This fitness app development company from Chicago offers anything from custom product development, staff augmentation, to fitness app cloning like HealthifyMe, Fitbit, Strava, and MyFitnessPal.  

Based in Chicago, Moon Technolabs leverages emerging technologies from AI, ML, Blockchain, to IoT, aiming to deliver next-gen apps that are long lasting. Whether you are building fitness apps for regular users, for personal trainers, for supplement stores, for fitness centers, or wearables tools, Technolabs always ensures to cover all fundamentals to advanced features. 

Fitness app they can build: 

• Workouts app for regular users. 
• Fitness trainer app. 
• Admin panel app for customer management for fitness centers. 
• Fitness, activity, and wellness tracking app. 
• Fitness steaming app. 

Other information: 

• Years of experience: 15+ 
• Completed projects: 1600+ in total 
• Clients: Siemens, Aara, Freelab, Money Club 
• Tech stack: PHP, HTML, Javascript, Kotlin, Swift, Laravel, Angular, Symphony. 

Pros & Cons of working with Moon Technolabs (from clients): 

• The team is very good at handling complex apps and technologies, notably Xamarin or Laravel.  
• They also show strong project management skills through effective communications. 
• The best part? Their pricing option is flexible, which is also more cost-effective than other vendors, supporting startups in their early venture. 
• Yet, some clients noted problems with meeting deadlines, suggesting Moon Technolabs estimate the roadmap more accurately. 

Notable case study: 

Moon Technolabs developed Inner Journey, an activity and wellness tracking app that helps users to monitor and improve their daily routine. This iOS and Android native app can track steps, mental performance, sleep, and much more. 

Techahead – California

Named as the top mobile fitness app developer in the US, Techahead have successfully worked with growing startups and global brands. 

For the last 15 years, they have built a strong portfolio of highly advanced apps for fitness tracking and monitoring. Following a human-centric design and prioritizing personalized features, they can consult and build your dream fitness apps. 

Fitness app they can build: 

• Wearable apps for tracking and monitoring. 
• Personal trainer, gym instruction and workout apps. 
• Mindfulness apps. 
• Diet and nutrition apps. 

Other information: 

• Completed project: 2000+ in total. 
• Tech stack: Python, ASP.NET, JavaScript, Kotlin, PHP, Swift. 
• Clients: Healthy Mommy, Jointhera, Journies. 

Pros & Cons of working with Techahead (from clients): 

• Techahead isn’t just a software development partner, they also consult on product architecture and framework, which many startups love. 
• They are also praised for their competitive rate, which is affordable for limited budget than many fitness app development companies in the US. 
• Their project management skills may fall behind in complex projects, as they need to improve communication and documentation to be more straightforward. 

Notable case study: 

In one year of development, Techahead helped Healthy Mommy to relaunch their app and quickly reached 2 million users. The app can monitor mom’s diet, weight loss and fitness performance daily. 

Quytech – California

Dreaming to build future-ready applications, Quytech actively adopts emerging technologies such as AI/ML, Blockchain, and AR/VR for like-minded startups and enterprises. 

The team earned multiple recognition for their commitment, with a 90% client retention rate. They make sure your fitness apps can provide flexible and scalable personalized options for users, which is what many US users love. Hence, Quytech is the best excel in personal training and exercise apps. 

Fitness app they can build: 

• Personal training, tracking & Coaching. 
• Gym and yoga facility management solutions. 
• Fitness streaming. 
• Online store for supplements. 
• Wellness apps such as mood tracking and meditation.  

Other information: 

• Completed project: 250+ fitness and health apps. 
• Tech stack: Kotlin, Flutter, Javascript, PHP, MySQL, AWS, .NET 
• Clients: Pernod Ricard, HP, ExxonMobil, and Petrofac. 
• Qualification: HIPPA, GPDR. 

Pros & Cons of working with Quytech (from clients): 

• Great value for money as they provide quality deliverables and end-to-end support. 
• Excel in Blockchain and AI-powered fitness apps. 
• Their project management skills could have been improved. Some delays have been recorded due to unclear project deadlines and lack of transparency in communication. 

Notable case study: 

With a team of 6 developers, they successfully launched MySwimPro in 8 weeks, a personal training app for swimmers to reach their goals. The app quickly gained 1.5 million users worldwide. 

Code Brew Labs – New York

StrongGreat in IoT and AR/VR technologies, you can trust Code Brew Labs to handle development and integration with wearables apps. Their goal is to bring full suite app development and world class solutions, suitable for both startups and enterprises. Because of that, they are actively pushing AI and AR/VR adoption in fitness apps. 

Fitness app they can build: 

• Fitness & Workout app. 
• Diet & Nutrition app. 
• Mood and Sleep cycle tracking app. 
• Yoga & Meditation app. 

Other information: 

• Completed project:700+ fitness and health apps. 
• Tech stack: Drupal, Angular, .NET, Flutter, JavaScript, Ruby, SDL. 
• Clients: TinyStep, 360Badminton, Vodafone, Viking. 

Pros & Cons of working with Code Brew Labs (from clients): 

• The team proactively gives suggestions on business aspects and strategic planning, which is what many startups are in need of. 
• Their delivery is consistently of high quality.  
• Compared to other fitness app development companies in USA, Code Brew may not offer attractive support to startups in pricing and product consultation. 
• Some clients highlighted inefficiency in project management, leading to many delays. 

Notable case study: 

The team covers a wide range of fitness app types and uses cases. Fitness apps build by Code Brew Labs have reached a total of 12 million users with over 1600 fitness coaches, personal trainers, and health professionals enrolled. 

Kaizen Softworks – Latin American

As a nearshore software development partner, Kaizen not only works with US-based clients but also Canada and a few Europe clients. The team strives for a long-lasting relationship that is beyond IT outsourcing, hence offering both consultation and development across industries.  

The team mainly works with large enterprise, SME, and early-stage startups. Kaizen offers different process and development approaches for each business size, making sure it fits your unique issues. For example, they provide extra discovery consultation and prototyping for startups. 

Fitness app they can build: 

Unfortunately, there isn’t a clear explanation on what type of fitness app they do. You must contact the team to learn more. They can work with app that requires: 

• Remote minoring and tracking. 
• Wearable device integration. 
• Fitness virtual training. 

Other information: 

• Years of experience: 10+. 
• Tech stack: JavaScript, Node, React Native, SQL, Redis. 

Pros & Cons of working with Kaizen (from clients): 

• The team has strong skills in React Native, as this is their domain. 
• Their development approach is a great support for startups. The team promise to deliver their first release in 3 months, which many clients love. 
• Kaizen has a greater time zone and cultural fit than offshoring options, yet their pricing is more expensive. And some clients suggest improvement in remote working and project management. 

Notable case study: 

This fitness app development company for USA worked with CompTrain to develop a training platform for elite athletes. The app includes fitness tracking, personalize program, and a web portal for remote coaching. Their input has helped CompTrain increase 50K new users. 

Apptunix – Texas

Understanding the daily life of every startup, Apptunix aims to make it easier for founders and CTOs with dedicated offers, from high-quality project-based to flexible staff augmentation. 

As a fitness app development company in the USA, they can build a wide range of apps, mainly relying on AI and IoT for the best delivery. 

Fitness app they can build: 

• Diet and nutrition apps. 
• Fitness tracker app. 
• Gym workout and Yoga app. 
• Fitness marketplace 
• Meditation and wellness app. 
• Mood, sleep, activity tracking app. 
• Social media for fitness app. 

Other information: 

• Completed project: 1000+ (including non-fitness apps). 
• Tech stack: C++, C#, JavaScript, Kotlin, Swift, Python, Xamarin, etc. 
• Clients: WilliamsonFit, GymShark, Yogi. 

Pros & Cons of working with Apptunix (from clients): 

• The team actively engages with clients to fully understand every requirement. 
• They maintain a transparent and closed relationship with clients. 
• When dealing with complex projects, they may fall behind with project management, leading to some delays, as clients reported. 

Notable case study: 

One of their most promising fitness apps is Yogi, a yoga practice app that can personalize practice schedule and plan, with guidance on each yoga movement. 

Tips to select the right partner

Can your chosen partner check out these 3 things? And how to make sure they are qualified for each? Here’s a quick and simple guide. 

1. Proven exposure

“Exposure” doesn’t stop at their skill in software development, but also in: 

• Building fitness apps, especially the type and the technology you want to use. 
• Understanding the US market to consult and build a solution that fits US users need. 

First, check their portfolio for any relevant case study. This shows that they know how to handle development challenges and complexes. Plus, they can consult you on a suitable software architecture, which is utmost important for any product development, beyond building what you ask for like a machine. 

Second, ask for success launch or past projects that served US users. Different markets have different UI/UX preferences, favor features, and regulatory landscape.  

For example, some Healthtech and fitness apps in the US are required to meet FDA or HIPAA standard, which may not be necessary for EU or Asia market. Or Americans adore Personalized features and All-in-one app (such as fitness training and diet tracking in one). Vendors that can seamlessly tackle these aspects will give better customization, development, integration, and consultation. 

2. Ability to deliver

In this, we take a deeper look at how your vendor can effectively do the job.  

What you need to check: 

Team size: A small talent pool usually pulls deeper focus on your project. But a larger one can offer more flexibility in team scaling and offer a wider range of positions. You not only work with developers and testers, but also UI/UX designer, business consultant, or growth specialists. 

At Synodus, we once built a team of 20+ members for a startup. 

Numbers of qualified technicians: Also keep an eye on the portion of middle to senior executives in their team. This means they can cover in-depth support and solve complex puzzles. 

Despite having only 250+ team members, at Synodus, 65% of them are middle level up. Some of them have 10 to 15 years of experience in product engineering and software development. 

Deliver method: Which development methodology and project management approach are they currently using? Unfortunately, there’s no right answer. The key is to find a partner that aligns with your vision and management on this aspect.  

For example, using Agile and Time & Material pricing is highly flexible, which is suitable if you want intensive iteration. But it can lead to cost overruns and delays if not managed properly. Yet, Waterfall and traditional Fixed cost might be rigid, but it has better control ability, hence better if you have a defined scope. 

Instead of limiting it to one, Synodus uses both. We utilize Agile for the initial phase. Once we move into development, Waterfall takes place to control time, quality, and cost. This approach has proved its success on many projects. 

3. How they approach partnership

This identifies the quality and how long-lasting your collaboration can be. Nobody wants to switch vendors once every 6 months, you would love someone that can work with you long-term. 

What to ask: 

• Are they able to maintain timely support and transparent communications (especially if you work remotely) 
• Do they prioritize a win-win approach that values a joint goal? You wouldn’t want a partner with a mindset of pure IT outsourcing, meaning that they only code whatever you ask for, no consultation, no post-launch support, or that every extra task takes a dime. 
• Can they balance cost, time, and quality? Avoid partners that show any signs of unclear pricing plan and development roadmap, or not willing to promise on every milestone. You can ask them for an SLA, which is a great start. 

Wrapping up

Despite having so many fitness app development companies in the US, only some of them stand out with better offers, qualified teams, and proven successful case studies. Yet, choosing one is another hustle. We hope that with our tips and reviews, you can find the one that most fit.