Workout

A natural-language activity logger for Möbius. Type what you did — 3×5 deadlift at 100kg, ran 5k in 24 min, hiked 8h in Hawaii, played football for an hour — and the embedded agent builds a current session, asks for required missing details, auto-categorizes activities, and commits the session when you press Finish session. Built for the gym, generalized to any activity.

Install

Via the App Store (recommended)

Open the App Store mini-app in Möbius, search for "Workout", tap Install.

Via paste-a-URL

In the App Store, choose Install from URL and paste:

https://raw.githubusercontent.com/mobius-os/app-workout/main/mobius.json

How it works

An embedded Möbius chat is the primary surface of the Log tab. Tell the Workout agent what you did — for example, deadlift 3×5 at 120kg, swam 40 minutes, then hiked 8km — and the agent maintains current_session.json. The app shows that draft above the chat, refreshes it after each turn, and commits the complete group into entries.json only when you press Finish session. Model/provider selection is the normal embedded-chat picker, the same path used by the LaTeX app.

Required details are intentionally strict:

• Strength needs an exercise plus at least one set, and every set needs reps and weight.
• Cardio/running/cycling/swimming/rowing/hiking needs an activity plus duration or distance.
• Yoga/sport/other needs an activity plus duration, note, or location.

If the user says 2 sets of deadlifts, the agent should ask for reps and weight before adding it. If the user says 2 sets with 20kg, it should ask which exercise. Multi-activity messages are split into one session draft.

Three bottom tabs:

• Log — the current session draft, your committed entries grouped into sessions, and a bounded, resizable Workout chat. A follow-up like "another set with 90" resolves in the ongoing chat context.
• Insights — analytics by category and exercise: weekly volume (strength = kg·reps, cardio = km, other = minutes), category stats, strength PRs ranked by estimated 1-rep max (Epley), cardio bests, and a year-at-a-glance streak heatmap. Tap any exercise (in the Exercises, Strength PRs, or Cardio bests tables) to open its drill-down: lifetime records (heaviest, est. 1RM, best set/session volume, most reps — or longest distance/time and best pace for cardio), a per-session trend sparkline (estimated-1RM for lifts, distance/pace for cardio), set-records (best weight at each rep count), and full session history. The trend is hand-drawn SVG, so the drill-down works offline like the rest of Insights.
• All — a flat, newest-first list of every entry, with delete.

Categories

Ten categories — strength, cardio, running, cycling, swimming, rowing, hiking, yoga, sport, other. The model picks the category key; the app owns the icon and color, so a hallucinated emoji can never drift the look of the app.

Data shape

Workout keeps the in-progress workout in current_session.json, then appends complete entries into entries.json on Finish session. Each committed activity is one entry; sessions are stored with a shared sessionId and can still be derived by the 4-hour gap for older data. Weights are stored in kilograms, distances in metres, durations in seconds (SI) regardless of the units you typed, so analytics never has to branch on unit.

[
  {
    "id": "ab12cd3",
    "ts": 1735730000000,
    "localDate": "2026-06-02",
    "sessionId": "s-1735729000000",
    "category": "strength",
    "activity": "Deadlift",
    "icon": "🏋️",
    "metrics": { "sets": [{ "weight_kg": 100, "reps": 8, "unit": "kg" }] },
    "raw": "did 1 set of deadlift 100kg x8",
    "source": "ai",
    "confirmed": true
  }
]

A v1.x install (the old program/set tracker, which stored state.json) is migrated on first open: each logged history row's sets become strength entries. Programs themselves were templates, not logged activity, so they're dropped — but the logged history is preserved.

Development

The pure logic (parse→normalize mapping, session grouping, e1RM, analytics) lives in logic.js and is the test target. Because Möbius's installer compiles only the single entry file, build-entry.mjs inlines logic.js into index.jsx between sentinel comments — edit logic.js, then run node build-entry.mjs. A test asserts the inlined block stays in sync.

node build-entry.mjs   # regenerate index.jsx's inlined logic block
node --test            # run the logic tests (also checks the inline is in sync)
npm test               # build-entry + node --test

License

MIT — see LICENSE.