B2C · gym workout tracker

How Symmetry grows

11 tactics and 10 figures from 1 interview.

Symmetry is a gym tracker built for Spanish speakers, mainly in Spain and Mexico, by founders who were fitness YouTubers. Launching to their own audience barely moved downloads; what worked was a huge volume of creator videos from hundreds of accounts, backed by steady A/B testing. The team reported about 3M downloads and $160K a month within a year.

Symmetry posted about 80K creator videos in a year from over 500 accounts, tracking which formats won; it reported about 1B views, with one lock-screen notification video reaching 17M.Symmetry
The founders first launched to their YouTube fitness audience and saw only a small download spike, and an influencer marketing attempt after that also failed.Symmetry (1)Symmetry (2)
Nearly half of revenue goes to creators to keep them posting, with revenue per download used to decide what the team can pay.Symmetry
The team tests each change against a real user problem for at least two weeks; an onboarding screen where users pledge to work out lifted retention about 3%, while two home-screen redesigns moved nothing.Symmetry (1)Symmetry (2)Symmetry (3)
Symmetry added ranks for each muscle and exercise, streaks and a friends feed, and said ranks are the most-liked feature; it treats tracking a first workout as the key metric.Symmetry (1)Symmetry (2)

Summary written 2026-09-26 from the tactics below. Figures are as founders stated them.

About Symmetry

What it is: Gym workout tracking app (weights/reps) with per-muscle ranks, social feed and streaks, for the Spanish-speaking market
Who it's for: Gym-goers in Spain and Mexico / Spanish-speaking market
Business model: Subscription app with paywall
Launched: 2025-06-06
Team: Multiple co-founders (all ex-fitness YouTubers) plus team
Funding
Outcome: ~$160K/month revenue, ~3M downloads one year after launch

As described in the interviews, not independently verified.

Symmetry's 11 tactics

Symmetry · B2C · gym workout tracker

Post ~80K creator videos a year from 500+ accounts; track which formats win

~1B views in a year; main driver of ~3M downloads

Built an internal dashboard tracking every UGC video, segmented into formats and sub-formats. ~80K videos in a year from 500+ accounts. Example winning format: iPhone lock screen showing a personal notification (e.g. 'your girlfriend leaving you') with a Symmetry notification below saying 'go to the gym and work out'; one such video got 17M views.

Workedugc-creatorsorganic-short-video

Starter Story · 2026-09-09

Symmetry · B2C · gym workout tracker

End onboarding with a screen where users pledge to work out

~3% better retention in an A/B test

A/B tested one extra screen at the end of onboarding where the user commits/signs that they will work out, against control. Tracked in PostHog.

Workedonboardingretention

Starter Story · 2026-09-09

Symmetry · B2C · gym workout tracker

Start each test from a real user problem and A/B test for two weeks

Credited for reaching $160K/month; most tests don't move the needle

Start from a problem, not a solution: What problem am I solving? How do I know it's real? Then list solutions/hypotheses, estimate how much each moves the target metric, define guardrail metrics, and A/B test control vs new version for at least two weeks before analyzing. Maintains 'Evelyn' (Experiment Velocity Engine List) database of experiments sourced from user interviews; product experiments in PostHog, paywall tests in Superwall. Evolved from building what founders wanted (terrible) to building user requests (mediocre) to this.

Workedexperimentationfeature-development

Starter Story · 2026-09-09

Symmetry · B2C · gym workout tracker

Test two new designs for the first screen after onboarding

Neither moved any metric

A/B tested two completely different designs of the first screen after onboarding (where users see their workouts) against control.

No effectproduct-activationexperimentation

Starter Story · 2026-09-09

Symmetry · B2C · gym workout tracker

Test the screens most users hit, like the paywall, before minor features

Prioritize screens that affect most users radically (paywall first) over low-reach features like dark/light theme. At Symmetry the exercise search screen strongly affects activation and retention, so it gets experiments; the post-login workouts screen does not.

Unknownexperimentationproduct-activation

Starter Story · 2026-09-09

Symmetry · B2C · gym workout tracker

Set big 90-day goals, bigger the newer the app

Every 90 days ('warmup') set marketing and product objectives with metrics reviewed weekly or daily. Early products should set very ambitious OKRs (e.g. +10% conversion in 90 days is easy for a new app). For a gym tracker the key metric is activation (tracking a first workout), since retention follows activation.

Unknownteam-process

Starter Story · 2026-09-09

Symmetry · B2C · gym workout tracker

Add ranks, streaks and a friends feed to workout tracking

Ranks are the most-liked feature

Rank for every muscle group and every exercise, levels per exercise, Strava-like social feed where users share workouts, and streaks visible to friends.

Unknownretentionproduct-virality

Starter Story · 2026-09-09

Symmetry · B2C · gym workout tracker

Pay creators nearly half of revenue so they keep posting

Nearly half of company revenue goes to creators, so they are incentivized to produce more content and stay with the app long-term. Uses ARPU per download to decide what can be paid for downloads. Exact comp structure (per video, per view, rev share) not stated.

Unknowncreator-opsugc-creators

Starter Story · 2026-09-09

Symmetry · B2C · gym workout tracker

Launch to the founders' own YouTube fitness audience

Only a tiny download spike

Founders were fitness YouTubers and launched to their YouTube community.

Failedfounder-brandcommunity

Starter Story · 2026-09-09

Symmetry · B2C · gym workout tracker

Build a gym tracker for Spanish speakers instead of the US

Described as the fastest-growing fitness app in the Spanish market

Gym tracker built for the Spanish-speaking market (mainly Spain and Mexico) rather than competing in the US.

Workedmarket-selectionlocalization

Starter Story · 2026-09-09

Symmetry · B2C · gym workout tracker

Try influencer marketing for a gym app

Tried influencer marketing after the YouTube launch; no details given.

Failedinfluencer

Starter Story · 2026-09-09

Symmetry by the numbers

Metric	Value	Context	Said in
revenue	USD 160K/month approximate	Last 30 days, RevenueCat dashboard	Starter Story 2026-09-09 1:59
downloads	3M downloads approximate	iOS + Android; transcript says '$3 million downloads'	Starter Story 2026-09-09 2:02
downloads	30K downloads approximate		Starter Story 2026-09-09 3:21
count	80K videos/year approximate	UGC videos posted in the last year ('nearly 80,000')	Starter Story 2026-09-09 4:04
count	500 accounts approximate	UGC social accounts ('more than 500')	Starter Story 2026-09-09 4:07
views	1,000M views/year approximate	Total UGC views in last year ('nearly a billion')	Starter Story 2026-09-09 4:07
views	17M viewsper video	Single viral video in the lock-screen notification format	Starter Story 2026-09-09 4:30
creator pay	50% approximate	Share of company revenue paid to UGC creators	Starter Story 2026-09-09 4:37
retention	+3%	Lift from adding a commitment screen at end of onboarding; unclear if points or relative, and which retention window	Starter Story 2026-09-09 12:30
time to milestone	12 months approximate	Launch to ~$160K/month	Starter Story 2026-09-09 5:04

Topics

A/B testing for apps4 Activation: getting users to first value2 App retention and churn2 UGC creator programs for apps2 Running many TikTok and Instagram accounts1 Gamification in apps1 App localization and international growth1 How to pay UGC creators and influencers1 Hooks for short-form video ads and posts1 YouTube marketing for apps1

Interviews

How I Built This $160K/Month Gym App · Starter Story · 2026-09-09