Lilly Sabri: £25 Classes to 4.4M App Users

Key Takeaways:

Lilly Sabri started YouTube in 2017 while working three jobs and renting a community hall for £25/hour
COVID lockdowns catapulted her from 30K to 3M subscribers in 16 months
She launched the LEAN app in 2021, now the #1 fitness app in the UK with 4.4M+ users
The app charges £16.99/month ($22.99), turning free YouTube viewers into paying subscribers
Today she spends 75% of her time on business strategy and 25% on content creation

In 2017, Lilly Sabri was living with her mum, juggling three jobs, and renting a community hall for £25 an hour to teach Pilates. She hoped three people would show up so she could break even. Eight years later, she owns one of the world's leading fitness apps with 4.4 million users, 6 million YouTube subscribers, and over a billion video views. That gap between £25 classes and a global subscription app is the entire creator economy story, compressed into one career.

From NHS Wards to YouTube

Sabri trained as a chartered physiotherapist at the University of Manchester. Her mum, an NHS nurse, had spotted physios working on hospital wards and thought it would suit her daughter. After graduating, Sabri started a junior rotation at Lewisham and Greenwich NHS Trust, gravitating toward sports physiotherapy. She volunteered at Barnet FC, then worked her way up to Watford FC. But the NHS path felt narrow. She trained as an APPI Pilates instructor and started evening classes on the side. Her "Lean Method," combining core Pilates with athletic training, filled those rented community halls. Then she did something most physios wouldn't consider: she pointed a camera at herself and hit upload. Her first YouTube video was, by her own admission, "not great." But she posted twice a week, every week, on the same days and times. Consistency over quality. She spent her evenings studying YouTube tutorials about content strategy. In three years, she hit 30,000 subscribers. 30,000 subscribers in three years sounds slow. It was. But those 30,000 people actually did her workouts. They weren't passive followers. They were users.

How Did 30K Subscribers Become 6 Million?

March 2020. COVID lockdowns. Gyms closed worldwide. Millions of people searched YouTube for home workouts. Sabri's library of bodyweight Pilates and HIIT videos was exactly what they needed. Between March 2020 and July 2021, she gained 3 million subscribers. Her most-viewed video has been watched over 87 million times. That kind of growth doesn't happen because of luck. It happens because three years of consistent, searchable content was sitting there waiting for demand to spike. The lesson for creators: the content you post when nobody's watching is the content that pays off when everyone starts looking. Sabri had hundreds of workout videos indexed and ranking before the pandemic. When search volume exploded, YouTube's algorithm had years of signals proving her content kept viewers engaged.

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The LEAN App: UK's #1 Fitness App

In 2021, Sabri launched the LEAN With Lilly app. It hit #1 in the UK App Store's fitness category and now serves 4.4 million users worldwide with a 4.78/5 rating from nearly 5,000 reviews. The app bundles structured workout programs, meal plans, habit tracking, and a physio section covering injury prevention and pain management. That last feature is pure Sabri: she's one of the few fitness influencers who can actually diagnose why your knee hurts. What is a creator app? A creator app is a standalone mobile product built around a creator's expertise, brand, and audience. Unlike courses or PDFs, apps generate recurring subscription revenue month after month. Pricing is straightforward:

Plan	Price	Annual Savings
Monthly	£16.99/month ($22.99)	None
3 Months	£39.99 ($52.99)	21%
12 Months	£119.99 ($158.99)	33%

Even a conservative estimate tells a compelling story. If just 2% of her 4.4M users are active paying subscribers (88,000 subscribers) at her average plan price, the app generates millions in annual recurring revenue. That's the power of turning a small percentage of followers into subscribers.

Why Does Subscription Beat Free YouTube?

This is the question every creator with a large free audience has to answer. Sabri told The Independent that YouTube now takes up only 25% of her working time. The other 75% goes to business strategy. That's a founder's time allocation, not a creator's. And it's a pattern we've seen in every fitness creator who built a real business: free content becomes the marketing channel, not the revenue source. The math is simple. YouTube ad revenue for a fitness channel typically pays $2 to $7 per 1,000 views. With a billion lifetime views, that might total $2M to $7M over eight years. A subscription app with 88,000 paying users at $22.99/month generates more than that every single year. YouTube built her audience. The app built her business. Kayla Itsines followed the same playbook and sold Sweat for $400M.

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What Can Creators Learn from Lilly Sabri?

1. Consistency compounds. Three years of twice-weekly uploads at 30K subscribers looks like failure. It was foundation. When demand surged, Sabri had the library, the SEO signals, and the production rhythm to capture it. 2. Credentials create moats. Plenty of people post workout videos. Very few can add a physio section backed by an actual physiotherapy degree. Real expertise makes your product defensible and your content trustworthy. Google's E-E-A-T framework rewards exactly this. 3. Free content is marketing, not the product. Sabri still posts free YouTube videos. But they exist to funnel viewers into the LEAN app, where structured programs, meal plans, and progress tracking create value worth paying for monthly. 4. The app is the business. Sabri shifted from 75% content creation to 75% business strategy after launching LEAN. That's the transition from creator to founder: your time goes where the compounding returns are. Our model at Built by Foundry exists to make that transition possible for creators who don't want to build the tech themselves. 5. You don't need millions to start. Sabri launched the app with 3 million subscribers, but the business model works at much smaller scales. 500 subscribers at $20/month is $10K in recurring monthly revenue. You don't need Sabri's audience. You need her mindset.

Frequently Asked Questions

How much does the LEAN With Lilly app cost?

LEAN With Lilly offers three subscription tiers: £16.99/month ($22.99), £39.99 for 3 months ($52.99), or £119.99/year ($158.99). The annual plan saves 33% compared to monthly billing.

What does the LEAN app include?

The app includes structured workout programs combining strength, Pilates, and cardio. It also features meal plans, habit tracking, and a physiotherapy section for injury prevention, which sets it apart from most fitness apps.

How many users does LEAN With Lilly have?

LEAN With Lilly has over 4.4 million users worldwide and holds the #1 fitness app ranking in the UK App Store, with a 4.78/5 rating from nearly 5,000 reviews.

How many YouTube subscribers does Lilly Sabri have?

Lilly Sabri has over 6 million YouTube subscribers. Her most-viewed video has been watched over 87 million times, and her total channel views exceed 1 billion.

Lilly Sabri rented a community hall for £25. Now 4.4 million people pay to use her app every month. She didn't get lucky during COVID. She had three years of content ready when the world needed it. The question isn't whether this model works. It's whether you're building the library that compounds when your moment comes. Ready to turn your expertise into a subscription app? Built by Foundry handles everything: design, development, App Store submission, and ongoing updates. $0 upfront. We earn when you earn.

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