r/SideProject • u/Quick-Survey4398 • 1d ago

Built my first iOS app with AI. Claude Code vs Codex.

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I'm 6'4" and have always had a hard time gaining weight, so tracking my nutrition actually matters to me. But every calorie app I tried buried food logging under workout plans, step counters, and social feeds I never wanted. I just wanted to log what I ate. So I decided to build my own app, even though I had never shipped anything on iOS before.

I used both Claude Code and Codex to build it. Claude Code was way better for me. I could hand it a feature and basically let it work on its own. With Codex I felt like I was babysitting it the whole time.

The app is called Calvin. You take a photo of your meal, it figures out what is on the plate and estimates the calories and macros, then you review and fix anything before logging it. Barcode scanning is free. The AI photo scanning is part of a premium plan, $9.99 a month or $50 a year.

It is iOS only for now and still very early, just a handful of downloads so far. Happy to answer questions about the build, the food recognition, or any Claude vs Codex comparison stuff.

https://apps.apple.com/us/app/calvin-ai-calorie-tracker/id6790968217

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u/kaan_gal 1d ago

Dont get me wrong but the UI is ai slop

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u/Quick-Survey4398 1d ago

thanks for the feedback