What Is Rubric?
What Is Rubric?
Rubric is an AI-powered health accountability app for iOS. It tracks what you eat, how you sleep, and how you move — then scores your day with a number you can trust.
Most health apps want to be your friend. Rubric is your auditor.
There are no streaks, no confetti animations, and no motivational quotes. Instead, you get a verified daily score, an honest coaching system, and a permanent record of your health performance. The interface is modeled after thermal receipts and office equipment — because your health data is a ledger of fact, not a social feed.
The Four Personas
Rubric operates through four distinct systems, each with a specific role:
| Persona | Role | What You Experience |
|---|---|---|
| Watcher | Passive data collection | Syncs health data from Apple Health in the background — sleep, steps, heart rate, workouts, and more. No action required after initial setup. |
| Scribe | Active logging | You log food via text, voice, or camera. The system records what you report and moves on. No negotiation. |
| Auditor | Scoring and verification | Calculates your Daily Rubric Score (3-99) using a deterministic formula. Same inputs always produce the same score. Generates Weekly Transcripts summarizing your performance. |
| Coach | AI strategy | A conversational AI with full access to your health data. Ask it anything: meal suggestions, workout plans, progress analysis. The Coach is strictly advisory — it never modifies your data directly. |
How Rubric Differs
Accountability over gamification. There are no badges, leaderboards, or social sharing features. The system measures your adherence to the targets you set, then tells you the truth.
AI-verified logging. When you log a meal, AI estimates the nutritional breakdown. You get adjustment dials to correct the estimate before committing. Physics over semantics — you adjust with sliders, not text negotiation.
Deterministic scoring. Your Daily Rubric Score is calculated from three sub-indices — Sleep, Nutrition, and Activity — multiplied by an Adherence factor. The formula is transparent and repeatable. A score of 72 today means the same thing as a score of 72 next month.
No-nonsense coaching. The Coach gives direct, data-informed advice. It knows your allergies, your injury history, your equipment access, and your calorie targets. It does not celebrate you for drinking water.
Safety Built In
Every AI-generated response passes through the Iron Dome safety system before reaching you. This is not AI — it is a deterministic filter that scans for allergens, flags calorie hallucinations (anything over 5,000 kcal per item), and checks coaching suggestions against your allergy profile. Warnings are always visible, never silently suppressed.
Platform and Pricing
Rubric is available on iOS, with Siri support on both iPhone and Apple Watch. A web companion at app.rubric.fit provides dashboard access from any browser.
The app is free during beta. Subscription tiers (Free, Pro, and Max) are launching in early 2026.
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