Last updated: September 4, 2026
Fueli ("the App", "we", "us") is developed and operated by Lewin Widmer, based in Switzerland. This Privacy Policy explains what information the App collects, how it is used, and who it is shared with. Questions about it can be sent to info@fueli.fit.
Your allergies, dietary restrictions, and calorie/protein goals can reveal information about your health, so we treat them separately. We rely on your explicit consent to process this information — given by entering it into the dedicated Food Preferences screen in the App, which you can leave blank if you'd rather not share it. You can withdraw this consent at any time by removing it from your preferences; this won't affect processing that already happened, but will mean Fueli can no longer filter meals for that allergy or restriction.
We do not store your body weight, height, gender, or exact age as part of your profile. An in-app calorie calculator (Settings and onboarding) may ask you to type these in to suggest a calorie/protein target — this calculation happens entirely on your device, is never sent to us or any AI provider, and only the resulting number is saved.
Connecting Apple Health is off by default and entirely your choice. If you turn it on in Settings, the App reads your most recent body weight, height, active energy burned, and step count — this stays on your device and is used only to show you a summary in Settings; it is never sent to our servers, stored in our database, or sent to Google's Gemini API. If you mark a meal as eaten, the App writes that meal's calories, protein, carbohydrates, fat, and fibre back into the Health app, mirroring nutrition data that already exists in Fueli. We never sell Health data, and never use it for advertising, ad targeting, or profiling. You can turn sync off at any time in Settings; revoking Fueli's actual Health permission is done from the iOS Settings app, per Apple's design.
Premium subscriptions are purchased and billed entirely through Apple's App Store. We receive confirmation of your subscription status (active, expired, etc.) from Apple — we never see your payment card details. We use RevenueCat solely to track and report on subscription activity (e.g. new subscriptions, renewals, cancellations) for our own analytics; it does not process your payment and cannot charge you. RevenueCat receives your Firebase account ID and subscription/transaction details (product purchased, purchase and expiration dates, transaction ID).
Fueli uses Google's Gemini API (the gemini-2.5-flash model, called directly rather than via Vertex AI) to generate meal plans and swaps. Each request includes: the meal slot and style being generated, your calorie/protein target for it, your dietary restrictions, allergies, and disliked ingredients, your favourite cuisines, cooking skill, budget, and household size, your meal-prep preferences, the names of meals already in your plan or recently generated (so it doesn't repeat them), and short feedback you've given on past meals. We do not send your email, name, account ID, exact age, gender, weight, height, or any Apple Health data.
Depending on Google's billing configuration for this service, Google may use the content you submit (and Gemini's responses) to improve its own products — this is standard for Google's free-tier API access and would not apply if this project moves to a billed, paid configuration. We're disclosing this so you know it's a possibility, not a certainty either way.
Fueli's meal suggestions, including allergy filtering, are AI-generated and can be wrong. Never rely on Fueli as your only safeguard against an allergen — see the Terms of Use for our full disclaimer.
We use the following third-party services to operate the App. Each processes data under its own privacy policy:
We do not sell your personal information.
You can permanently delete your account at any time from Settings → Delete Account. This removes your profile, current meal plan, and your authentication record. Being transparent about a current limitation: some related records — past plan history, meal-tracking logs, meal feedback, your saved weekly plan, and your subscription entitlement record — are not yet automatically deleted alongside your account, and your PostHog analytics history is not deleted or anonymised either. If you'd like these removed sooner than we complete that work, email us and we'll do it manually. Data Apple retains for its own transaction records, and standard infrastructure logs and backups, follow those providers' own retention practices.
Your rights may arise under the Swiss Federal Act on Data Protection (FADP) and, where applicable, the EU/EEA General Data Protection Regulation (GDPR) or other applicable privacy laws — Swiss users are protected primarily under the FADP; GDPR applies additionally if you're located in the EU/EEA. Depending on which applies to you, you may have the right to access, correct, delete, or export your personal data, restrict or object to certain processing, withdraw consent, and lodge a complaint with a supervisory authority (in Switzerland, the FDPIC). Not every right applies in every situation. To exercise any of these, contact us at info@fueli.fit.
Fueli requires that users be at least 18 years old. This isn't only our own policy — Google's Gemini API terms, which power Fueli's AI meal generation, prohibit use by anyone under 18.
Data is stored and transmitted using Firebase's infrastructure, which encrypts data in transit and at rest, and server-side requests are protected with Firebase App Check to help prevent abuse. No system is completely secure, and we can't guarantee absolute security of information transmitted to or stored by us.
Fueli is based in Switzerland, but the third-party services we rely on — Google/Firebase, Gemini, AdMob, PostHog, Kickbox, Open Food Facts, Pexels, and Apple — commonly process data outside Switzerland, including in the United States. Where this happens, we and our providers rely on the safeguards available under Swiss and EU law, such as adequacy decisions or standard contractual clauses, for transfers to countries without an equivalent level of data protection.
We may update this Privacy Policy from time to time. For material changes, we'll provide reasonable notice — such as an in-app notice before the change takes effect — rather than relying only on the "Last updated" date above.
Questions about this policy or your data can be sent to info@fueli.fit.