signalReddit r/SideProject2026-10-06
My side project got its first paying customer and suddenly it stopped feeling like a side project
Kinetic, a fitness AI that builds personalized workouts, got its first paying customer, a stranger who saw value in the product. This validation motivated the builder to grow the user base from one to 10 to 100. The site is live at train-with-kinetic.com.
- for who
- Indie hackers and side project builders seeking validation.
- what changes
- The first paying customer turns a side project into a real product, shifting focus from building to growing.
- to do
- Check out Kinetic at train-with-kinetic.com and follow the author's progress.
key points
- Kinetic is a fitness AI that creates workouts around user goals
- First paying customer provided major validation and motivation
- Builder aims to grow from 1 to 10 to 100 customers
#personal project#first paying customer#fitness AI
score
score 5 out of 10. 0-10: how dense the facts are, multiplied by how much you can do with them after reading. 8+ means the topic's evidence bar is met: benchmarks and availability for a new model, amount and investors for a funding round, revenue figures for a solo-money story. Below 5 an item does not enter the digest. A press release scores 3 or less, a reprint loses 2, anything older than 14 days loses 1, a headline that misleads loses 3.
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