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F1l0 – Fitness Logger

F1l0 – Fitness Logger

by y42·Jun 20, 2026·1 point·0 comments

AI Analysis

MidCozy

Author admits dozens of fitness trackers exist — this one's just self-hostable.

Strengths
  • Works as static HTML with no backend required beyond optional Firebase sync
  • Simple plain data model exports cleanly for AI training advice queries
  • No subscription or account creation required for basic functionality
Weaknesses
  • No novel features beyond what Hevy, Strong, and FitNotes already offer
  • Self-hosting is nice but doesn't solve any unsolved fitness tracking problem
Category
Target Audience

Privacy-conscious fitness enthusiasts who want local control

Similar To

Hevy · Strong · FitNotes

Post Description

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/pause 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 ̿)

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