Connected Fitness App FIIT Unveils ONE FIIT: An All-In-One Fitness Operating System Bringing World-class Training to Gyms, Brands, and Communities

FIIT, the UK’s #1-rated fitness app with over 50K five-star reviews and 50M+ workouts delivered, has launched ONE FIIT, an all-in-one fitness operating system built to provide digital and in-real-life group training at scale.

This strategic expansion into B2B enables the business to power fitness experiences beyond its consumer app, with the ambitious goal of connecting 500k gyms, 10m+ trainers, and major brands with their communities—anytime, anywhere.

From the first connected fitness app to multi-brand app operating system

What began in 2017 as a consumer fitness app is now powering an entire ecosystem of connected experiences,from gym floor to living room to corporate wellness hubs. ONE FIIT delivers world-class workouts through a turnkey, software-led solution to:

• Commercial gyms
• Residential buildings
• Hotels and spas
• Corporate workplaces
• Fitness brands

Changing fitness routines and expectations

The fitness landscape has fundamentally shifted. The pandemic accelerated a hybrid fitness revolution, where consumers now expect seamless experiences across home, gym, and mobile with many fitness enthusiasts training in multiple locations every week.

Meanwhile, boutique fitness concepts have proven that branded, community-driven experiences command premium loyalty and engagement. Nonetheless, most gyms and fitness brands still struggle with fragmented tech stacks, costly hardware dependencies and the complex challenge of delivering consistent experiences across digital and physical touchpoints.

This convergence of hybrid training habits and the rapid expansion of fitness franchises has created a massive infrastructure gap. Traditional gym software wasn’t built for today’s omnichannel fitness reality, while hardware-heavy solutions lock operators into inflexible, expensive ecosystems. The market needed a software-first platform that could scale branded

fitness experiences instantly, whether powering a single boutique studio or thousands of franchise locations globally.

A fitness solution, not a platform

ONE FIIT offers more than content. It’s an operating system for the future of fitness. From high-impact programming and production capabilities to integrated tech that delivers seamlessly across screens, ONE FIIT enables partners to scale their fitness offerings without hardware constraints or clunky integrations.

Same mission, bigger impact

“Our mission to make exercise a habit for everybody hasn’t changed,” says Ian McCaig, Founder and CEO of ONE FIIT. “But now, we’re building the infrastructure to help every fitness-forward brand and facility deliver exceptional training experiences, without needing to build the tech themselves.”

Growth, momentum and what’s next

With £15M raised to date and now operating profitably, ONE FIIT’s B2B business has grown 170% year-on-year. Partnerships such as HYROX have supercharged adoption, helping affiliate over 10,000 gyms and 35,000 coaches worldwide.

HYROX365 has experienced explosive growth in recent years, with gym affiliation surging worldwide year-on-year,” says Douglas Gremmen, Chief Growth Officer at HYROX. “We’re thrilled to partner with ONE FIIT as we bring the HYROX265 Performance Hub to life across our global affiliate networks. Their expertise and commitment to innovation perfectly align with our mission to make healthy performance training accessible for everyone. Together, we’re not only building a dynamic platform, but also empowering our partners and communities worldwide to unlock their full potential.”