22-Year-Old Gym App Founder Reaches $160,000 Monthly Revenue
Mauro, a 22-year-old builder, reportedly grew a gym app to $160,000 per month in one year by testing features with A/B experiments, killing underperformers, and scaling creator-driven UGC distribution that paid creators about half of revenue.
Original post · 1 min read
He’s 22 years old and built a gym app doing $160,000/month in just one year.
But Mauro’s edge isn’t the product or the marketing. It’s how he decides what to build.
Most builders ship features and hope. Mauro treats every feature like a science experiment - problem first, hypothesis second, A/B test everything, kill anything that doesn’t move the metric.
One tiny example: adding a single screen at the end of a workout lifted retention 3%. Meanwhile, two completely redesigned home screens moved… nothing.
He also cracked distribution with UGC: 500+ creator accounts, 80,000 videos posted in a year, nearly 1 billion views.
He pays creators ~50% of revenue so they stick around for the long run. One lock-screen-notification format did 17M views on a single video.
The takeaway: stop guessing what to build. Track events, run A/B tests for 2+ weeks, and focus on the screens that actually move activation, retention, and ARPU.
But Mauro’s edge isn’t the product or the marketing. It’s how he decides what to build.
Most builders ship features and hope. Mauro treats every feature like a science experiment - problem first, hypothesis second, A/B test everything, kill anything that doesn’t move the metric.
One tiny example: adding a single screen at the end of a workout lifted retention 3%. Meanwhile, two completely redesigned home screens moved… nothing.
He also cracked distribution with UGC: 500+ creator accounts, 80,000 videos posted in a year, nearly 1 billion views.
He pays creators ~50% of revenue so they stick around for the long run. One lock-screen-notification format did 17M views on a single video.
The takeaway: stop guessing what to build. Track events, run A/B tests for 2+ weeks, and focus on the screens that actually move activation, retention, and ARPU.
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