Side Hustle School Ep. 3344 - TBT: iPhone App Tracks Weight-Loss Progress
Feb 26, 2026
A developer builds an iPhone app that tracks measurements and photos to show weight-loss progress. He created the tool while learning iPhone development to reach a personal goal. The story follows slow, steady revenue growth and the challenges of running a one-person product. Learn why coding became the launchpad for this side project.
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Built App For Wedding Weight Loss And Learnt To Code
- Lewis built Progress App initially as a personal project to lose weight before his wedding while learning iPhone development.
- After launching it publicly he found users liked it and has grown revenue slowly each year while maintaining mostly solo operation.
Why Measurements And Photos Beat The Scale
- Lewis notes the scale can be misleading, so tracking measurements and photos gives a clearer picture of body changes during weight loss.
- The app focuses on tape-measure measurements and progress photos to keep users motivated beyond fluctuating scale numbers.
Learn To Code As A Side Hustle Skill
- Lewis recommends learning to code because it's easier than people expect and opens opportunities like building side hustles or freelancing.
- He points listeners to beginner resources like Hour of Code and emphasizes coding's versatility for job improvements or automations.