First, the important bit. This app is for learning and exploring symptoms. It is not a diagnosis and not a substitute for a doctor. If something is severe or sudden — chest pain, trouble breathing, weakness on one side, fainting, heavy bleeding — stop and call your local emergency number.
The basic idea
Show the app where it hurts by tapping the body, then say what it feels like. It asks you a few follow-up questions, the way a doctor would, and then gives you possible explanations, what care usually looks like, and when to seek help.
1. Getting in
There are two ways to use the app:
- Create an account — you get 500 free messages to start. Sign up with an email and password, confirm the email, sign in, and you're ready. Your remaining messages show as ⚡ in the header.
- Use your own Anthropic key — if you already have one, paste it instead and there's no message limit here. It stays in your browser and talks straight to Anthropic.
You can switch between the two, or sign out, any time in ⚙ Settings.
2. The body
The body panel shows a realistic 3D human body. Point anywhere on it and the app works out which body part that is. Up top, Male / Female switches the body, and ↺ Reset body clears your selection and recentres the view.
3. Tell it where it hurts
Two ways to pick a spot — use whichever is easier:
- Tap the body directly. Tap again to unselect.
- Crosshair (◎) — tap the ◎ button (bottom-left of the body) for a movable crosshair. Drag it to the exact spot; the name updates live as you move it — and as you spin the body behind it — so you can line it up precisely. Let go to add that area (or use the ＋ Add button). Handy when a tap won't land on the exact part you mean.
- You can select several places at once, front and back.
- Everything you pick appears as a chip under Selected areas. Click the × on a chip to remove it.
- You don't have to pick anything — you can just type instead.
4. Moving the body around
- Drag the body with your mouse or finger to spin it left/right — and slide it up and down at the same time, like grabbing it.
- ▲ / ▼ (bottom-right) move your view up and down the body.
- Scroll or pinch to zoom in and out.
- ↺ (bottom-right) puts the view back to the start.
The body always stays upright — you can spin it round, but you can't tip it over, so you never get lost.
5. Keyboard shortcuts
These work when you're not typing in a text box:
| ← → | Spin the body left / right |
| ↑ ↓ | Move your view up / down the body |
| + − | Zoom in / out |
| F B | Front view / Back view |
| L R | Left side / Right side |
| 0 | Reset the view |
| ? | Open this help |
| Esc | Close any pop-up window |
6. Describe what you feel
- Quick add — one tap adds a common description (sharp pain, burning, swelling, fever…) to your message.
- Type in the box in your own words. Press Enter to send, Shift+Enter for a new line.
- 🎤 Microphone — speak instead of typing, and it writes it down for you.
7. The conversation
- It asks a few questions first — how long, how bad, what makes it worse — because better answers give a better result.
- When it asks something, tappable answer buttons usually appear under the question. One tap answers it — no typing. You can always type your own answer instead.
- Get assessment — press this any time to skip ahead and get its best answer so far.
- If it spots something that could be urgent, it stops and says so in a red warning box.
- 🔊 Voice — reads the answers out loud. ↺ New — clears everything and starts fresh.
8. Saving and sharing
- 💾 Save — downloads the whole session (what you picked and the conversation) as a file.
- 🔗 Share — copies a link that contains the session, so you can reopen it later or send it to someone.
- 📂 Load — opens a session file you saved earlier.
- ⬇ Install — appears when your browser can install this like a normal app on your phone or computer. It then works offline.
9. Your profile (optional)
The 👤 Profile button (top of the page) opens an optional health questionnaire — age, height, weight, ancestry, medicines, allergies, past and family history, and lifestyle. Nothing is required, but anything you fill in is passed to the assistant so it reasons with the full picture (for example, respecting an allergy or weighing a condition) instead of asking you again. It's saved only in this browser; Clear wipes it.
10. Local environment (air quality + pollen)
The 🌿 Environment button opens a live map of your local environment for anywhere on Earth — combining air quality and pollen. Type a city or ZIP / postal code, use 📍 My location, or tap the map, and the panel shows both at once:
- Air quality — the nearest PurpleAir community sensor's US AQI and category (Good → Hazardous), the underlying PM2.5, and how fresh the reading is. Readings are EPA-corrected (like AirNow), so they track official-style numbers — but these are community sensors, not regulatory monitors.
- Pollen & allergens — the tree / grass / weed levels plus the specific pollens in the air there (birch, oak, ragweed, grass…), each on a 1–10 scale with an "in season" tag.
It opens on a global pollen heatmap; switch the map between Air quality / Tree / Grass / Weed. In Air quality mode, zoomed out you get a worldwide AQI overview (coloured cells), and as you zoom in it swaps to live individual sensors. Useful when breathing, cough, or allergy symptoms might be tied to smoke, pollution, or the pollen season. Data comes from PurpleAir and Google via our server, so the keys are never exposed; only the map point / area you look at is sent.
11. Settings
- Account — when you're signed in, shows your email and how many free messages (⚡) you have left, with a Sign out button.
- Anthropic API key — the bring-your-own-key option. Stored only in this browser and sent straight to Anthropic, with no message limit.
- Naming — whether body parts are called by everyday names ("Upper belly") or medical ones ("Epigastrium"). Display only: the assistant is always told the medical term, so its answers do not change.
- Model — which AI to use. Cheaper and faster, or slower and more capable.
- Free 3D model (GLB) — advanced: swap in your own male/female body files for the body view.
Your privacy
What you pick and type — and anything in your profile — stays in this browser. When you ask a question, your symptoms and profile are sent to the AI service (Anthropic) to answer you, and are then subject to their terms; nothing else is transmitted. If you create an account, your email and free-message count are held by our sign-in provider so your credits can be tracked — that's all. Using your own key instead keeps everything browser-direct. The environment map sends only the map point or area you view (or your location, if you use it) to look up nearby air-quality sensors and pollen — no health details go with it. Your profile can hold sensitive health details, so only enter what you're comfortable sharing with an AI service, and use Clear in the profile to remove it whenever you like.
Where the anatomy comes from
The bodies and organs here are real anatomical data, not illustrations, used under open licences: