GymPilot

Greek and English, light and dark. No account, no server: everything is stored on your device.

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Features

🗓️ Workout plan & home

• Weekly plan: pick the muscle groups (and optionally exercises with sets × reps) for each day, start from a ready-made plan (Push/Pull/Legs, Upper/Lower, one group a day, Full body 3×), or import your coach's plan by pasting text or picking a .txt/.json file:

  Δευτέρα: Στήθος, Τρικέφαλα
  - Bench Press 4x8
  Τρίτη: Πλάτη, Ραχιαίοι, Δικέφαλα
  Τετάρτη: Ξεκούραση
  

  Greek or English day and muscle names both work, as do "Push", "Pull", "Upper", "Lower" and "Full body".
• Today card on top of the Log screen: today's groups and exercises (ticked off as you log them), "Tomorrow: Back · Biceps", a week strip with the plan and the days you trained, the coach's top note and a month calendar.
• Start picks the group and its next planned exercise; after every save the form moves on to the next exercise of the plan.

🏋️ Training log

• Log sets (kg × reps) per exercise with the date and time of the workout, organised by muscle group (including Lats), with your own exercises on top of the defaults.
• Ghost values: last session's numbers appear faintly in every field, so you always know what to beat.
• Steppers: −/+ next to every field (±2.5 kg, ±1 rep). Hold to repeat. An empty field starts from the ghost value.
• Live record feedback while you type: a box under the sets turns into 🏆 New record · +2.5kg or ▼ Down · −5kg · record 70kg before you save, and the record set gets a ✓.
• "+ Set" copies the last filled row and "− Set" removes the last one. There's also a progression hint, edit/delete, and confetti when you save a record.
• Rest timer (1:00–3:00, +30″) that can start by itself after every save. The chime asks iOS for a transient audio session, so music (Spotify, Apple Music) ducks for a moment and you hear it over your playlist.

📒 History

• One box per workout (same day and muscle group) with totals: exercises, sets, volume, records, the time and the calories of the workout.
• Boxes collapse: the latest workout starts open and older ones start closed.
• Each exercise is badged as record / up / down / same against the previous session, with a filter by muscle group.

📊 Stats

Five groups in a bar at the top: Overview (coach, week, tiles, achievements), Progress (Progress Every Time, records, sets per group), Streaks (Stay consistent, your year), Body (recovery map, steps) and Reports (weekly report, Wrapped).

• Pilot Coach (plateau detector): reads your logs on the phone and flags exercises stuck for 3+ sessions (by estimated 1RM), drops of 5%+, muscle groups you haven't trained in two weeks, push/pull imbalance and volume swings, each with a concrete fix (add weight, change rep range, deload to ~90%, or swap the exercise).
• Progress Every Time: every set of an exercise as a dot, weight in amber and reps in green, for the last 2 sessions or all of them; Stats switches to the top set / estimated 1RM / volume chart.
• Stay consistent: the last months as day grids with your training days in green.
• Workout calories: MET 5 × your weight × the workout's length (first to last save, or ~2.5 min per set), on every workout, the week, the report and Wrapped.
• Muscle recovery map: a front and back body silhouette colours each muscle group by how rested it is since you last trained it (bigger sessions need longer). The Log screen suggests the groups that are ready today, and one tap picks one.
• Your year: a 52-week heatmap of sets per day, plus your best weekly streak and most common training day.
• Monthly Wrapped: your favourite exercise, biggest record, heaviest set, tonnes lifted (as many cars, elephants or buses), water and steps for the month. It shows up on the first open of a new month and can be shared as a story-sized image.
• Achievements: 25 badges (Club 100, 10 tonnes, 5,000 kcal, Wings for lats, plan keeper, 12-week streak and more). Their own section: tap any badge to see what it means, how to unlock it and how close you are. They're worked out from your data, so nothing is lost if you restore a backup.
• Weekly rings for workouts, sets and muscle groups, plus a week strip.
• Tiles: weekly streak, total workouts, total volume, records.
• Progress chart per exercise: top set, estimated 1RM (Epley) or volume.
• Sets per muscle group over the last 30 days, and a personal-records list with strength per kg of bodyweight (estimated 1RM ÷ your weight at the time, e.g. 1.24× BW).
• Steps: today vs your daily goal, 7-day bars with workout days marked, and average steps on training vs rest days.
• Weekly report: workouts, sets and volume, new records, steps, water days, average weight and its change, plan adherence and protein days, for this week or the last. You can share it as an image.

🥗 Nutrition

• Today: two rings for calories and protein against your targets. Check off each meal of your plan when you eat it, or add something off-plan (kcal and protein).
• Plan: attach the dietitian's PDF or photo (stored on the device in IndexedDB and included in backups), set daily calorie and protein targets (a protein target of ~1.8 g/kg is suggested from your weight), and list the day's meals with time, contents, kcal and protein.
• Water: a bottle sized to your daily goal fills up as you log drinks (+250 / +330 / +500 / +750 ml or a custom amount). Any drink can be undone.
• Weigh-ins: one per day, with the change since the last weigh-in, a weight goal, progress measured from the weight you had when you set the goal, and a 90-day chart.
• Weekly summary: rings for water-goal days, weigh-ins and goal progress, plus a weekly log of average weight, change vs the previous week (toward or away from the goal), water days, plan adherence and protein days.

🌍 Language & theme

• Greek and English: follows the phone on a new install; switch any time in Settings.
• Dark mode: automatic with the phone, or forced light/dark in Settings.

Your data

• Everything lives in the browser's localStorage on your phone: no account, no login, no backend, no analytics.
• Weekly backup: on the first open after 7 days, a small prompt offers a one-tap backup through the share sheet. The file is always called GymPilot-backup.json, so saving it to the same iCloud Drive folder replaces the old one. No server is involved. Backup and restore are also in Settings (⚙️), and restoring merges with what's already there.
• Data belongs to the address the app is opened from. If you move to another URL, back up first and restore there.

Install on your phone

• iPhone: open the link in Safari → Share → Add to Home Screen. Running from the home screen also keeps storage more reliable.
• Android: open in Chrome → menu → Install app.

The app works offline, and a new version loads automatically the next time you open it.

Steps from Apple Health (and Huawei, Garmin, Fitbit…)

A web app can't read HealthKit directly, so an Apple Shortcut does the bridging. Watches like Huawei reach it by syncing into Apple Health first: Health app → Steps → Data Sources & Access → enable the watch's app.

Create a shortcut named WT Steps:

1. Find Health Samples: type Steps, start date in the last 14 days, group by Day.
2. Repeat with Each sample: Format Date (custom yyyy-MM-dd), then Text [date] [Value].
3. Combine Text of the repeat results with new lines.
4. Text: WTSTEPS, a new line, then the combined text.
5. Copy to Clipboard.

Then tap ↻ Συγχρονισμός (Sync) on the Steps card in Stats. After the first time, the button runs the shortcut for you. Steps can also be entered by hand, and the same instructions are in the app (✎ → Πώς το συνδέω).

Tech

• Plain HTML, CSS and JavaScript: no framework, no build step, no dependencies.
• PWA: web manifest, home-screen icons, and a service worker that is network-first, always revalidates its own files and falls back to an offline cache.
• Charts, rings, the water bottle and the logo are hand-written SVG.
• Hosted on GitHub Pages.

index.html        markup for all four tabs and the dialogs (Greek text, English in data-en attributes)
style.css         light and dark themes (green + coffee) and components
js/i18n.js        language and theme, loaded first
js/native.js      bridge to the GymPilot phone app (only active inside it)
js/core.js        data, helpers, metrics, calories, Pilot Coach
js/plan.js        workout plan, import, the Today card, month calendars
js/log.js         log form, steppers, live feedback, rest timer
js/history.js     history boxes
js/stats.js       coach, recovery, rings, Progress Every Time, Stay consistent, records, year
js/reports.js     steps, weekly report, Wrapped, achievements
js/nutrition.js   water, weigh-ins, dietitian's plan
js/settings.js    tabs, settings, backup & restore, start-up
sw.js             service worker (offline + updates)
manifest.json     install metadata
icon*.png/svg     app icons
ANDROID-LAUNCH.md how to put GymPilot on Google Play

Run locally

Any static file server works:

python3 -m http.server 8000

Then open http://localhost:8000. After changing files, bump CACHE in sw.js so installed copies pick up the new version.

Roadmap

• Google Play release as a Trusted Web Activity: see ANDROID-LAUNCH.md
• Native app (Expo, in progress) for Apple Health / Health Connect and rest notifications with the screen locked

See CHANGELOG.md for release notes.