Privacy Policy

Last updated: August 26, 2026 · Effective on publication

The short version: FuelKit keeps your food log, weight, and profile on your device. There are no accounts, and we don’t run servers that store your information. We don’t collect, sell, track, or share your data, and there are no analytics or advertising SDKs in the app. Everyday food searches are answered entirely on your device from a food list built into the app — nothing is sent anywhere. Only if you tap “Search branded foods online” does your search text leave the device, and even then your logs and personal details never do. When you log food by voice using the microphone button, your speech is transcribed on your iPhone and no audio is sent anywhere. The one exception on this page is Siri, which does its own listening and is therefore outside our control — so it is switched off until you turn it on, and you can turn the microphone off entirely if you’d rather the app never held that permission. The Voice logging section explains all of this precisely.

Who we are

FuelKit (“the app”) is developed and published by Ferrixguild LLC (“we,” “us,” “our”). This policy explains how the app handles information. It applies to the FuelKit iOS app and does not cover any third-party app or service you may use alongside it.

Information we collect

None that leaves your device. FuelKit does not require an account, a login, an email address, or any sign-up. We do not operate a server that receives your personal information.

The app creates and stores the following locally on your device:

Your food log — the foods and meals you record, their macros, and the day they belong to
Foods you’ve looked up or entered, cached so you can re-log them offline
Recipes and saved meals you build, including ingredient lists you paste in
Anything you logged by voice that we couldn’t match to a food — the transcribed text is kept so you can finish logging it later, and you can delete it from the review list at any time
Your bodyweight entries and weight-goal history
Your profile used for calorie math (height, age, biological sex, activity level, goal and rate) and your in-app preferences (units, appearance)

This data is saved on your iPhone using Apple’s on-device storage frameworks. It is not transmitted to us or to any third party. If you have iCloud or device backups enabled, that data may be included in your own private Apple backup, which is governed by Apple’s Privacy Policy and is not accessible to us.

Food lookups

Most searches never leave your device. FuelKit ships with a copy of the U.S. government’s USDA food data — roughly 8,000 whole foods with their serving sizes — stored inside the app. When you type in the search box, the app looks through that built-in list on your device. No request is made, nothing is transmitted, and it works in airplane mode.

Packaged and branded products aren’t in the built-in list, so those are looked up over a secure connection to public databases: USDA FoodData Central (a U.S. government database) and Open Food Facts (an open, community-maintained database). This only happens when you deliberately tap “Search branded foods online” — or when you scan a barcode.

What is sent, and only when you ask: the search text you type — or a barcode you choose to scan — plus the standard technical information any internet request includes (such as your IP address, which we never see or store).
What is never sent: your food log, weight, profile, targets, device identifiers, or any account information. There is no account to send.
No profiles or identifiers. Requests are not tied to you. We do not attach a user ID, and we do not build a profile of what you search for or eat.

These lookups are handled by those providers under their own policies — see the USDA privacy policy and the Open Food Facts privacy policy. You can avoid these requests entirely by entering foods and macros manually, which works fully offline.

Voice logging

FuelKit can log food from speech. There are three ways that can happen and they do not have the same answer, so each one is spelled out separately rather than summarised into a single reassuring sentence.

How you log	Is anything sent to Apple?	Default
The microphone button in FuelKit	No — transcribed on your iPhone	On, can be switched off
Siri (“Hey Siri, log food in FuelKit”)	Possibly — outside our control	Off
Apple Intelligence (optional assist)	No — runs on your iPhone	Off

The microphone button

FuelKit explicitly requests on-device-only speech recognition from iOS. If your device cannot transcribe your language locally, FuelKit refuses to use the microphone at all rather than fall back to sending audio elsewhere. Audio is never written to disk and never uploaded.

About the permission message. When you first use the microphone, iOS shows a message saying speech data from the app will be sent to Apple. That wording is Apple’s, is identical for every app that uses speech recognition, and describes the server-based mode that the API also supports — the mode FuelKit does not use. We cannot change that text. You do not have to take our word for it either: turn on Airplane Mode and dictate. If it still works, nothing was sent.

If a phrase can’t be matched to a food, the transcribed text is saved on your device so you can finish logging it later. It stays on your device, you can delete any item from the review list, and Delete All Data removes all of it.

You can switch the microphone off entirely. In FuelKit’s settings, under Voice Logging, turning off Microphone button removes it from the app, and FuelKit then never requests microphone or speech-recognition permission at all. You can still dictate into the text box using your keyboard’s own microphone — that is handled by iOS under your keyboard settings, and FuelKit plays no part in it.

Siri, and Shortcuts you create

When you use Siri, Siri does the listening, not FuelKit. What reaches the app is already text. Whether Siri handled that request on your device or on Apple’s servers depends on your device, your iOS version, and the request itself. FuelKit cannot force one or the other, and cannot observe which happened.

Because that is the one path we can’t make a promise about, Siri logging is switched off in FuelKit until you turn it on in Settings.

“Improve Siri & Dictation” is not the setting that stops this. That setting controls whether Apple keeps audio to review and improve their models. It does not control whether a request is sent for processing. Retention and transmission are different things, and only the first is what that switch governs. If your goal is that nothing ever goes to Apple for voice, turning it off is not sufficient — leaving Siri logging off in FuelKit, and using the microphone button instead, is.

Apple’s handling of Siri and Dictation is described in Apple’s Privacy Policy and in the Siri privacy information shown on your device under Settings → Apple Intelligence & Siri. Apple is the authority on their own processing, not us, and it changes between iOS versions.

Apple Intelligence

On devices that support it, an optional setting uses the language model built into your iPhone to understand longer or more casual phrasing, and to read pasted recipes that aren’t one ingredient per line. It is off by default, it runs entirely on your device, and FuelKit does not use Apple’s server-based model — there is no network request involved.

It is only ever asked which foods you named and how much. Every calorie and macro comes from FuelKit’s own food data, never from the model. Voice logging works without this setting turned on.

Camera

FuelKit uses the camera only when you tap Scan to read a product barcode. The image is processed on your device and is never saved or uploaded; only the barcode number is used, and only to look the product up as described above.

Apple Health (HealthKit)

FuelKit can optionally sync with Apple Health, so your calorie and macro targets stay consistent with the height and weight your other fitness apps already know. This is off by default and requires your explicit permission through Apple’s own system prompts, which you can withdraw at any time in the Health app.

What FuelKit reads: your height, bodyweight, biological sex and date of birth — the four figures the calorie and protein calculations need — and the active energy you burn, so your daily target can reflect the workouts your Apple Watch, LiftKit or RunKit recorded.
What FuelKit writes: your height and bodyweight when you record them, and the food you log — dietary energy, protein, carbohydrates and total fat. Writing your food to Health is what lets the Health app and our other apps see what you have eaten; it is the only way that information travels between them. FuelKit only ever replaces the entries it wrote itself, so food logged by any other app is left alone.
What we receive: nothing. Health data is handled by Apple on your device and in your own private iCloud. We never receive, store, or transmit your Health data, and never use it for advertising or marketing.

Turning this off stops the syncing. It does not delete anything already written to Apple Health — that is yours, and you can remove it in the Health app.

Our other apps on the same device

If you also install our other apps (LiftKit for strength training, RunKit for walks, runs and rides), they can share a small amount of information with each other on your device only, using Apple’s App Group storage. This is so a goal you set in one app doesn’t have to be set again in the others, and so your food intake can be read alongside your training.

What is shared: your height, age, activity level, weight goal and latest bodyweight, plus a summary of training load and planned sessions.
What is not shared: your food log itself, your recipes, your saved meals, and anything you logged by voice. Each app keeps its own records in its own file.
Where it goes: nowhere. This is a shared folder on your own device. It is never transmitted, and it only exists if you have more than one of our apps installed.

Analytics, tracking, and advertising

FuelKit contains no analytics, no tracking, and no advertising. We do not use the Advertising Identifier (IDFA), we do not track you across apps or websites, and we do not share data with data brokers. This is reflected in the app’s Privacy Manifest and in the “Data Not Collected” label on the App Store.

Sharing and selling

Because we don’t collect your data, there is nothing for us to sell or share. We do not disclose your information to third parties, except where we would be legally required to produce information we do not, in fact, hold.

Automatic backups

FuelKit can keep a rolling set of backup files of your own data. This is off unless you turn it on in Settings.

Where they go: FuelKit’s own folder on your device, visible in the Files app so you can retrieve one without opening FuelKit. They are not uploaded anywhere and we never see them.
What they contain: the same information as a manual JSON export — your food log, saved foods, recipes, saved meals, weight history and profile.
How many: the five most recent, written at most once a day when you open the app.
Turning it off deletes them. We don’t leave copies of your data behind after you’ve opted out.

If you have iCloud or device backups enabled, these files may be included in your own private Apple backup, in the same way the rest of the app’s data is.

Data retention and deletion

Your data lives on your device for as long as the app is installed. You can erase everything at any time with Delete All Data in the app — that covers your food log, saved foods, recipes, saved meals, anything waiting to be reviewed from voice logging, your bodyweight history and your profile. Deleting the app removes its local data from your device. Data you chose to write to Apple Health is yours and is removed in the Health app.

Health disclaimer

FuelKit’s calorie and macro figures — including BMR, maintenance, and target estimates — are rough calculations from standard formulas and the nutrition data you look up. They are provided for general information only and are not medical or nutritional advice. Talk to a qualified professional before making significant changes to your diet, especially if you have a medical condition.

Children’s privacy

FuelKit is not directed at children under 13, and we do not knowingly collect personal information from anyone — the app collects no personal information at all.

Changes to this policy

If the app’s data practices change, we will update this page and revise the “Last updated” date above. Material changes will be reflected here before the new behavior ships.

Contact

Questions about this policy or your privacy? Email support@liftrunhealthkit.com.