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[ARTICLE · art-34739] src=f1l0.nickyreinert.de ↗ pub= topic=ai-tools verified=true sentiment=· neutral

Show HN: F1l0 – Fitness Logger

A developer released F1l0, a self-hostable, PWA-ready fitness tracking app built to meet personal requirements unmet by existing solutions, with features like custom training blocks, progress charts, and Firebase sync. The creator emphasizes the concept of 'personal apps' enabled by AI, allowing individuals to build tailor-made tools without subscriptions or mandatory accounts.

read1 min views1 publishedJun 20, 2026

I build this self-hostable, PWA-ready fitness tracking app.

This is less about the app itself, there are probably dozens of them out there. This is more about me being fascinated about the idea of "personal apps": AI enables us to just build something that perfectly fits our indivual requirements - like a tailor-made suit.

None of the apps I know matched my requirements, some of them come with a subscription, some required an account. So I build F1L0. It would even work as a static HTML page with no backend services - like on GH Pages. I just needed a backend to add synching support with Firebase.

Repo:

https://github.com/nickyreinert/f1l0 Features:

  • custom training blocks and excercise of course - custom train/ routine - simple plain data model that can be exported to ask AI for trainign advice - supplement support - did you take your "meds"? - progress tracker with some simple charts - using Firebase to sync (right now only Google Accounts are supported)

If you complain about features, usability or font size: Yeah well, thats the idea of a personal app. You dont need to like it. It's my suit, it suits me. (̿Ĺ̯̿ ̿)

Comments URL: [https://news.ycombinator.com/item?id=48607670](https://news.ycombinator.com/item?id=48607670)

Points: 1

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