Uploaded September 2026 | Updated September 2026, 2 days ago
22 years old. $160K/month. One year in. But the app isn’t the secret, it’s how he decides what to build.
Meet Mauro. He built Symmetry, a gym tracking app that’s now one of the biggest names in the Spanish fitness market.
He went through 3 phases:
Phase 1: build what we wanted. Terrible.
Phase 2: build what users asked for. Mediocre.
Phase 3: treat every feature like a science experiment. $160K/month.
His system:
Set ambitious quarterly OKRs (easier to move metrics when you’re new)
Track downloads, activation, retention, ARPU
Start from a problem, not a solution
Write hypotheses, then A/B test everything for 2+ weeks
Kill what doesn’t move the needle, double down on what does
One example: adding a single screen at the end of a workout increased retention by 3%. Meanwhile two full redesigns of the home screen moved nothing.
22 years old. $160K/month. One year in. But the app isn’t the secret, it’s how he decides what to build.
Meet Mauro. He built Symmetry, a gym tracking app that’s now one of the biggest names in the Spanish fitness market.
He went through 3 phases:
Phase 1: build what we wanted. Terrible.
Phase 2: build what users asked for. Mediocre.
Phase 3: treat every feature like a science experiment. $160K/month.
His system:
Set ambitious quarterly OKRs (easier to move metrics when you’re new)
Track downloads, activation, retention, ARPU
Start from a problem, not a solution
Write hypotheses, then A/B test everything for 2+ weeks
Kill what doesn’t move the needle, double down on what does
One example: adding a single screen at the end of a workout increased retention by 3%. Meanwhile two full redesigns of the home screen moved nothing.
