Caroline Girvan: Free YouTube to a Paid Fitness App

Q: How much does the CGX app by Caroline Girvan cost?

CGX costs $12.99/month or $99.99/year, with a 14 day free trial. Annual billing saves roughly 36% compared to monthly. Prices vary slightly by region with the final price shown at checkout.

Q: How many YouTube subscribers does Caroline Girvan have?

Caroline Girvan has 3.4M+ YouTube subscribers as of 2026, plus 850K+ Instagram followers. She was named the world's second fastest growing YouTube channel during the 2020 lockdown.

Q: When did Caroline Girvan launch the CGX app?

She launched the CGX app in April 2023, three years after posting her first free YouTube workout in April 2020. The app is available on iOS, Android, web, and via casting to TV.

Q: What's the difference between Caroline Girvan's free YouTube and CGX?

The YouTube channel offers free standalone workouts. CGX offers structured multi week programs (EPIC I, II, III, Heat, Endgame), progressive overload tracking, recipes, and on demand strength sessions that don't appear on YouTube.

Q: How do creators build apps like CGX without coding?

Most creators don't build the app themselves. At Built by Foundry, we build, launch, and run the full subscription app for creators and a revenue share model. We handle development, App Store submission, and ongoing updates forever. Learn more about app care and ongoing maintenance. Caroline Girvan built it. Your turn.

Key Takeaways:

Caroline Girvan filmed her first YouTube workout in April 2020 from a converted garage in County Antrim, Northern Ireland, and grew the channel to 3.4M+ subscribers in under five years
She launched the CGX app in April 2023, charging $12.99/month or $99.99/year for structured strength programs that go beyond what's free on YouTube
She was named the world's second fastest growing YouTube channel during lockdown, with media calling her the female Joe Wicks
Her free workouts stay free. The app sells the structure, the progression, and the planning that a YouTube playlist can't deliver
A creator's free channel is the trailer. The app is the business

Who Is Caroline Girvan?

Caroline Girvan is a Northern Irish personal trainer and YouTube creator who turned a free home workout channel into a 3.4M+ subscriber audience, then launched the CGX subscription app to monetize the segment of her audience that wants real programming. She films from a converted garage in Ballymena, talks straight into the camera, and treats strength training like a discipline, not a wellness aesthetic. She had been a certified personal trainer for over a decade before YouTube. The pandemic was the catalyst. In April 2020, with her in person clients locked down, she filmed a single workout for them and posted it on YouTube so they could follow it at home. The video found an audience she didn't know existed. By 2021, The Irish News profiled her as one of the world's fastest growing creators of the pandemic. The piece compared her to Joe Wicks. The difference: she never tried to be a personality. She tried to be a coach.

How Did She Grow 3.4M YouTube Subscribers?

Three things, all unfashionable in the creator playbook of 2020. She refused to dumb down strength training. Most YouTube fitness creators in 2020 chased the lowest common denominator: bodyweight, dance cardio, 10 minute "abs in bed." Girvan filmed kettlebell swings, dumbbell complexes, barbell hip thrusts. The workouts assumed you owned equipment and were willing to sweat. That filter pulled in serious people, not casual scrollers, which is exactly the audience that converts to paid later. She published programs, not workouts. EPIC I, EPIC II, EPIC III, EPIC Heat, EPIC Endgame. Each one a multi week structured plan with a calendar, a name, and a finish line. People did not have to invent their own training week. They followed the program. Programs build cohorts. Cohorts build referral. She didn't break character. No mid roll ads in the workouts. No "thanks for watching, smash the like." She counted reps, gave technique cues, and finished the set. The trust that builds over forty five minutes of someone actually coaching you is the moat that no algorithm can erode. We broke down why this kind of trust converts in why some creators earn 4x more (2026 data). By 2024 she had crossed 3.4M YouTube subscribers and 854K+ Instagram followers. The Wikipedia page on Caroline Girvan lists her among Northern Ireland's most influential creators of the pandemic era.

What Is the CGX App?

CGX is Caroline Girvan's subscription fitness app, launched in April 2023, available on iOS, Android, web, and casting to TV, with a price of $12.99/month or $99.99/year and a 14 day free trial. It is built around exclusive programs that don't appear on the free YouTube channel: structured strength plans for every level, progressive overload tracking, recipes, articles, and on demand workouts that go deeper than the YouTube library. The app lives at cgxapp.com with native apps on the App Store and Google Play. Members get web access on desktop and can cast the workouts to a smart TV, which matters for the audience training in a garage gym rather than scrolling on a phone.

Here's the pricing breakdown:

Plan	Price	Effective Monthly
Monthly	$12.99/month	$12.99
Annual (upfront)	$99.99/year	$8.33
Free trial	14 days	$0

The annual plan is roughly 36% cheaper per month than the monthly plan. That gap is the standard creator app trick: reward commitment, lock in retention, front load cash. We broke down the full math of this structure in our guide to annual vs monthly subscriptions for creator apps. The 14 day trial is longer than the typical 7 day window, which suggests she's optimizing for serious commitment rather than impulse signups, the same pattern we saw with Whitney Simmons' Alive app.

Our work

How Ellie Fausett Turned Her Public-Health Research Into the Vector Guard App

Epidemiologist Ellie Fausett and Built by Foundry turned years of field research into Vector Guard, an iOS app for identifying ticks and mosquitoes and staying safe outdoors.

Read the case study → (opens in a new tab)

How Much Does Caroline Girvan Make From the App?

Girvan has not published subscriber numbers and we won't fabricate them. But the math is easy to back into. If even 0.5% of her 3.4M YouTube subscribers converted to the app at the annual price point, that's 17,000 paying members at $99.99/year, or roughly $1.7M in annual recurring revenue from the app alone. A 1% conversion would put her closer to $3.4M ARR. Public data on creator app conversion rates from the State of Subscription Apps 2025 puts top quartile creator apps at 2 to 4% trial to paid, which makes both numbers plausible floors rather than ceilings. Compare that to her YouTube ad revenue. Fitness CPMs sit between $4 and $10. Even at the upper end, the math of a YouTube only business stops scaling around her audience size:

Monetization	Per 1,000 free YouTube views	Per 1,000 paid app subscribers
YouTube ads (fitness CPM ~$7)	~$3 net to the creator	n/a
App at $99.99/year annual	n/a	~$8,333/month recurring
Implied annual value per fan	< $1 per viewer/year	~$100 per subscriber/year

That's the gap most fitness creators never close. Ad revenue is a tax on attention. Subscription revenue is a contract for value. We mapped the same gap in Jillian Michaels' fitness app journey to 1M users and in our breakdown of why fitness creators dominate the app economy.

Why Did She Build an App Instead of Just Selling Programs?

She could have sold a PDF. She could have sold a course. She could have plugged into Stan Store or Kajabi and called it a day. She did not. Three reasons an app wins for a creator at her scale. Progressive overload requires data. A PDF can give you a workout. It can't track that last week you did 25kg goblet squats for 12 reps and this week you should hit 27.5kg for 10. An app remembers. That memory is the entire product. Strength training without progression tracking is just exercise. Subscription compounds. One time products don't. A PDF sale at $40 is one transaction. A subscription at $99.99/year is a relationship. Even at conservative churn, the lifetime value gap is 5 to 10x. We walked through the math in the creator middle class: building $10K to $50K/month businesses. The app is a moat against the platform. If YouTube changes its algorithm tomorrow, Girvan's free channel takes a hit. The app keeps charging. Owning the subscriber relationship is the only real audience ownership in the creator economy, and we've made that case in the platform trap: creators building on rented land.

Live every Thursday

Watch us tear down a creator business, live

Every Thursday at 11 AM PT we take a real creator business and show the app hiding inside it: the wedge, the paid loop, the pricing, and what would sink it. Free, and the replay goes to everyone who registers.

Save your seat → (opens in a new tab)

What Should Other Creators Take From This?

The Caroline Girvan playbook is the cleanest version of the free to paid creator model in fitness, and it works in any niche where someone needs structure, progression, or repeated use. Give the front door away. Charge for the structure inside. Free workouts are the trailer. The CGX app is the feature film. The free content earns trust. The paid product earns money. Don't dilute the free thing to sell the paid thing. Girvan's YouTube workouts didn't get worse after CGX launched. They got longer, more frequent, and more polished. The funnel works because the top is generous. Pick a niche where repetition matters. Fitness, language learning, meditation, productivity, finance tracking. These categories convert to apps because users want to come back daily. A one time topic does not. We broke down which niches print recurring revenue in 6 creator app niches quietly printing MRR in 2026. The trap most creators fall into is trying to monetize too early. They paywall the free channel before it's earned the trust. Girvan waited three years between her first YouTube video and the CGX launch. She built the audience first. She built the product second. The order matters. You can read more about our approach to building creator apps on the Built by Foundry about page.

Frequently Asked Questions

How much does the CGX app by Caroline Girvan cost?

CGX costs $12.99/month or $99.99/year, with a 14 day free trial. Annual billing saves roughly 36% compared to monthly. Prices vary slightly by region with the final price shown at checkout.

How many YouTube subscribers does Caroline Girvan have?

Caroline Girvan has 3.4M+ YouTube subscribers as of 2026, plus 850K+ Instagram followers. She was named the world's second fastest growing YouTube channel during the 2020 lockdown.

When did Caroline Girvan launch the CGX app?

She launched the CGX app in April 2023, three years after posting her first free YouTube workout in April 2020. The app is available on iOS, Android, web, and via casting to TV.

What's the difference between Caroline Girvan's free YouTube and CGX?

The YouTube channel offers free standalone workouts. CGX offers structured multi week programs (EPIC I, II, III, Heat, Endgame), progressive overload tracking, recipes, and on demand strength sessions that don't appear on YouTube.

How do creators build apps like CGX without coding?

Most creators don't build the app themselves. At Built by Foundry, we build, launch, and run the full subscription app for creators and a revenue share model. We handle development, App Store submission, and ongoing updates forever. Learn more about app care and ongoing maintenance. Caroline Girvan built it. Your turn.

See What We’d Build You →