# Fuel Lens

> Fuel Lens is a browser-first nutrition, food, energy, goal, biometric, and training-data analysis application.
> The public Fuel Lens Wiki is the authoritative reference for feature behavior, imports, calculations, settings, privacy, and interpretation.

Fuel Lens helps people inspect exported Cronometer, FatSecret, and MyFitnessPal data; review daily nutrition; compare foods; analyze trends; calculate goals and adaptive TDEE; and create reports or AI-ready context exports.

## Canonical sources

- [Fuel Lens Wiki](https://fuellens.vercel.app/wiki): Complete public documentation index.
- [AI Summary](https://fuellens.vercel.app/ai-summary): Expanded machine-readable overview and interpretation boundaries.
- [AI Summary as plain text](https://fuellens.vercel.app/ai-summary.txt): Same summary in a text-friendly format.
- [Full Wiki corpus](https://fuellens.vercel.app/llms-full.txt): Wiki content collected into one document for retrieval systems.
- [Privacy Policy](https://fuellens.vercel.app/privacy-policy): Data storage, processing, analytics, and connector privacy.
- [Legal Notice](https://fuellens.vercel.app/legal-notice): Legal information for the website operator.

## Feature documentation

- [Dashboard](https://fuellens.vercel.app/wiki/dashboard): A quick read of energy, nutrient, goal, and progress signals.
- [About me](https://fuellens.vercel.app/wiki/about-me): Meet Florian Zahn, the runner and builder behind Fuel Lens.
- [My other Apps & Websites](https://fuellens.vercel.app/wiki/my-other-apps-websites): Explore Florian Zahn's other apps, websites, and open-source projects.
- [Upload & data import](https://fuellens.vercel.app/wiki/upload): Import Cronometer exports or supported food-diary files into Fuel Lens.
- [Daily Diary](https://fuellens.vercel.app/wiki/daily-diary): Inspect one day’s foods, nutrients, energy, exercise, and biometrics.
- [Foods browser](https://fuellens.vercel.app/wiki/foods): Search imported food entries and inspect their nutrient details.
- [Compare Foods](https://fuellens.vercel.app/wiki/compare-foods): Compare foods side by side using nutrient-density scoring.
- [Trends](https://fuellens.vercel.app/wiki/nutrient-trends): Compare nutrient and biometric measurements over time in one shared trend view.
- [Top Contributors](https://fuellens.vercel.app/wiki/top-contributors): Find which foods contribute most to a selected nutrient.
- [Medical Report](https://fuellens.vercel.app/wiki/medical-report): Assemble a configurable, exportable nutrition and biometrics report.
- [AI Context Export](https://fuellens.vercel.app/wiki/ai-context-export): Create a focused, portable snapshot of selected metrics for AI analysis.
- [Settings Overview](https://fuellens.vercel.app/wiki/settings): Find guidance for every page and option in the website Settings area.
- [Goal Overview](https://fuellens.vercel.app/wiki/goals): Review goal achievement, daily trends, and the goals that are most and least consistent.
- [Energy & Macros](https://fuellens.vercel.app/wiki/settings-energy-macros): Set the energy calculation, carbohydrate basis, macro mode, and keto options.
- [Goals](https://fuellens.vercel.app/wiki/settings-goals): Set nutrient targets, micronutrient presets, and ratio goals.
- [Display](https://fuellens.vercel.app/wiki/settings-display): Control meal-group metrics and the target bands used in progress views.
- [Scoring & Data](https://fuellens.vercel.app/wiki/settings-scoring-data): Choose the active data source, completed-day behavior, and scoring profiles.
- [Adaptive TDEE](https://fuellens.vercel.app/wiki/adaptive-tdee): Estimate energy expenditure from intake and observed body-weight change.
- [Data Management & Privacy](https://fuellens.vercel.app/wiki/data-management): Save, restore, export, and clear the data kept in your browser.
- [Google Drive Sync](https://fuellens.vercel.app/wiki/google-drive-sync): Connect a FuelLens workspace, sync changes across devices, resolve conflicts, and restore earlier versions.
- [Nutrient Scoring Models](https://fuellens.vercel.app/wiki/nutrient-scoring-models): Compare the Nutrient Rich Food Index (NRF) and Custom model for food nutrient-density scoring.
- [Nutrient Rich Food Index (NRF)](https://fuellens.vercel.app/wiki/nrf): Explore the Nutrient Rich Food Index (NRF), classic NRF 9.3, research variants, and Fuel Lens's scoring formula.
- [Custom model](https://fuellens.vercel.app/wiki/custom-model): Learn how soft caps, nutrient weights, and missing data shape the Custom Exponential score.

## Important interpretation boundary

Fuel Lens is an analysis and visualization tool. Its trends, scores, goal checks, adaptive TDEE estimates, and medical-report outputs depend on the imported records and configured settings. They are descriptive calculations, not medical diagnosis, medical clearance, or a substitute for professional advice.

## Privacy boundary

User nutrition, diary, body-weight, exercise, and biometric records are designed to remain in the browser's local storage and/or IndexedDB during normal use. The public documentation describes the product; it does not expose a user's private dataset.