How glüf Works | AI-Powered Gluten-Free Restaurant Safety Ratings

The problem glüf solves

77% of people with coeliac disease have been accidentally exposed to gluten when eating out (Coeliac UK, 2025). The reason is not usually malice — it is inconsistent information. Menus change. Staff turn over. What was safe last month may not be safe now. And most existing sources of gluten-free restaurant information are based on static, unverified, crowd-sourced reviews that cannot keep up.

glüf was built to fix this.

Step 1: AI generates a baseline safety profile

For every restaurant in the glüf database, our system uses large language model technology to analyse publicly available information — including menus, online reviews, and allergy information — and generate a structured safety profile. This gives every restaurant a baseline rating from day one, without requiring any user input. It means glüf works at national scale immediately, not just in cities where enough users have left reviews.

Step 2: Users leave structured post-visit feedback

After visiting a restaurant, glüf users can leave a structured review rated against four specific criteria that matter most for coeliac safety:

Staff knowledge — Did the staff understand what coeliac disease means? Did they take it seriously? Were they confident answering questions about cross-contamination?

Labelling clarity — Was the gluten-free menu clearly labelled? Was it easy to identify what was safe and what was not?

Gluten-free variety — Was there a meaningful choice of gluten-free options, or just one or two token items?

Taste — Was the gluten-free food actually good? Because safe food should also be enjoyable.

These four criteria form the glüf rating. Each one is weighted and combined into an overall score that reflects the full picture of a coeliac's dining experience.

Step 3: Feedback strengthens the algorithm

Every structured review feeds back into the glüf algorithm, updating and improving the restaurant's safety profile over time. The more visits a restaurant receives from glüf users, the more accurate and reliable its rating becomes. This creates a continuous improvement cycle: more users mean better data, and better data helps more users make safer decisions.

Step 4: Users make informed decisions before they go

Before choosing a restaurant, glüf users can see a clear safety profile, an AI-generated summary of the gluten-free experience, and ratings from other coeliacs in the community. The goal is simple: know before you go.

glüf also includes a built-in social network, so users can share photos, follow other glüfers, and see what people in their network have eaten and where. Trust travels through community — and the coeliac community is one of the most generous and well-informed sources of knowledge about safe dining that exists.

What glüf does not do

glüf does not guarantee safety. Restaurant kitchens change constantly — menus, staff, suppliers, and procedures all shift. glüf provides the most accurate, up-to-date information it can, but users should always inform restaurant staff of their coeliac diagnosis on arrival, regardless of a restaurant's glüf rating.

Download glüf free on iOS and Android at www.gluf-app.com.