Gym app built through constant testing

A gym app whose founder treats product development like a science experiment, using A/B tests and feature validation to decide what to build.

At a glance
Tags are estimates from Clef, a classifier that read the source. Each one shows how sure it was.

Category

Software and apps
97% sure

Earns from

Subscriptions
91% sure

Startup cost (estimate)

$1k to $10kLow confidence
47% sure

Time it takes (estimate)

Part-timeLow confidence
50% sure

Where

Online
97% sure

Coding

Needs coding
98% sure
Source
Mauro on Starter Story with Pat Walls, “How I Built This $160K/Month Gym App”, September 9, 2026.

Self-reported by Mauro: $160,000 last month Not verified by us.

Watch or read the sourceTheir site

The summary above is ours. Any income figures are the operator’s own claims, in the source.

More software and apps ideas

  • Language learning app that teaches through songs
    A consumer app that teaches languages through music and singing. The founder tested the idea with viral content before building a simple first version and runs it solo.
    Software and apps
    Starter Story, 2026
  • Health and fitness app grown with paid ads
    An indie health and fitness app. The founder credits a repeatable marketing playbook built on paid ads, rather than the specific app, for its growth.
    Software and apps$1k to $10k
    Starter Story, 2026
  • Gym fitness app built by a first-time coder
    An iOS fitness app built to solve the founder's own problem at the gym. The founder had never shipped code before and grew it with content and a personal brand.
    Software and apps$100 to $1k
    Starter Story, 2026
  • AI rendering tool for architects and designers
    An AI tool that lets architects and designers generate realistic home renders in seconds. Revenue stayed flat for years until a single product pivot changed the business.
    Software and apps
    Starter Story, 2026
  • Marketing software for indie app developers
    A marketing SaaS for indie developers. The founder shaped the product through a very large number of customer calls with the ideal customer.
    Software and apps
    Starter Story, 2026
  • Searchable database product sites
    The operator runs a few near-identical sites that each sell access to a niche database, such as investors, angels or journalists. The revenue model is not stated in the source and is likely paid access.
    Starter Story, 2026