Which Calorie Tracker Apps Sell Your Data? A 2026 Privacy Comparison

Callie is our app, and it is one of the eight compared here. We quote each company's own privacy policy and App Store privacy label rather than summarizing from memory, and every source is dated at the bottom. We read them all on October 13, 2026. This is a plain reading of public documents, not legal advice.

The 30-second answer

Three calorie trackers say outright that they don't sell your personal data: Callie, Cronometer and MacroFactor. MacroFactor goes furthest. It also says it does not share data for cross-context behavioral advertising, its App Store label has no tracking section, and you can delete your data from inside the app. MyFitnessPal and Cal AI share a policy template that says they don't "expressly" sell data but that some ad-cookie uses may legally count as a sale. Lose It! says it may sell or share personal data for targeted ads and lets you opt out. If you want to avoid giving an email address at all, Yazio is the only one whose policy describes an anonymous account.

What "selling" your data means in a privacy policy

Most people picture a company handing a spreadsheet of names to a buyer. US state privacy laws use a wider definition, which is why policies now hedge.

Under California's CCPA, you can ask a business to stop selling or sharing your personal information. The California Attorney General explains that "sharing" means sharing for cross-context behavioral advertising: targeting ads at you based on your activity across many websites. Businesses that sell or share must offer a "Do Not Sell or Share My Personal Information" link and must honor a browser-level Global Privacy Control (GPC) signal.

So when you read a calorie tracker's policy, look for three things:

1. Does it say it sells personal data, or that some uses "may constitute" a sale?
2. Does it disclose data to advertising partners or ad networks?
3. Can you delete your account and data, and how long does deletion take?

The App Store gives you a fourth check. Every iPhone app must publish a privacy label, and the section called "Data Used to Track You" lists data the developer says may be used to track you across other companies' apps and websites. Apple notes the labels are provided by the developer and not verified by Apple.

Calorie tracker privacy compared

Feature	Callie	MyFitnessPal	Cal AI	Lose It!	Cronometer	MacroFactor	Yazio	FatSecret
Policy says it sells personal data	No: 'We do not sell your data'	Not 'expressly'; some ad-cookie uses may count as a sale	Not 'expressly'; some ad-cookie uses may count as a sale	May sell or share for targeted ads	No	No	No sale statement (EU GDPR policy)	No sale statement found
Shares with advertising partners	Not listed				Free-tier users	No cross-context ad sharing	Ad and attribution tools listed	Not listed
App Store 'Data Used to Track You'	None	Identifiers, Usage Data	Identifiers, Usage Data	Contact Info, Identifiers, Usage Data	Contact Info, Identifiers, Usage Data	None	Identifiers	None
How to delete your data	Request deletion; done within 30 days	Privacy Request Center	Email [email protected]	Privacy portal or email	In your account, or email	In app: More, Data Management	Delete account in app	Request; backups purged within 6 months
Use without an email account							Anonymous account
Policy date shown	Effective Jan 26, 2025	Effective Mar 18, 2025	Effective May 21, 2026	Last updated Jun 24, 2026	Last revised Jun 23, 2025	Last updated Dec 1, 2025	Version of April 2026	No date shown
Owner	Inlab Products (independent)	Francisco Partners	MyFitnessPal	Ziff Davis	Cronometer Software Inc.	Stronger By Science Technologies	YAZIO GmbH	Secret Industries Pty Ltd

App by app: what each policy actually says

Callie

Callie's privacy policy (effective January 26, 2025) lists what it collects: name, email and subscription payment details; health and fitness data (calorie intake, activity, weight, height, age); and usage data (device type, app activity, IP address). On sharing it says: "We do not sell your data." It may share data with service providers such as payment processors, to comply with legal obligations, or with your explicit consent. Personal data is deleted within 30 days of an account deletion request, though payment records can be kept longer for tax and legal reasons and backups may hold residual copies for a short period. You can access, correct or delete your data.

Callie's App Store label lists Contact Info and Usage Data as linked to you, Diagnostics as not linked, and has no "Data Used to Track You" section. Callie has no ads. It is not an account-free app: its policy lists name and email among the data it collects.

Does Cal AI sell your data?

Cal AI's privacy notice is effective May 21, 2026 and closely mirrors MyFitnessPal's, which makes sense since MyFitnessPal bought Cal AI in a deal announced on March 2, 2026. The key sentence: "While Cal AI does not expressly 'sell' information to others, certain uses of Functional Cookies and/or Targeted Advertising Cookies on our website to collect, use, and disclose information may constitute 'sales' or 'sharing' of personal information or the use of personal information for 'targeted advertising' purposes under applicable privacy laws."

It also says it may disclose "device and browser information and activity and usage information, to our marketing and advertising partners, including social media platforms, third-party advertising networks." In its California table, photos and audio input (the "audio, electronic, visual" category) are shared with service providers only, and the "sold" column for that category reads "N/A". Data from Google Health Connect is not used for marketing or advertising, per the policy.

The App Store label lists Identifiers and Usage Data under "Data Used to Track You". To opt out or delete, email [email protected], or use "Manage your Personalization Preferences" in the app.

Is MyFitnessPal safe?

Two separate questions hide in that search.

Security history. In late February 2018 an attacker took data from about 150 million MyFitnessPal accounts. Under Armour, which owned the app then, found out on March 25 and disclosed it on March 29, 2018. The exposed data was usernames, email addresses and hashed passwords. Government ID numbers and payment card data were not affected. If you had an account then and reused that password anywhere, change it there too.

Data sharing today. MyFitnessPal's privacy policy (effective March 18, 2025) uses the same "does not expressly 'sell'" wording as Cal AI. Its summary says: "We also share your information with marketing and advertising partners to show you relevant content and advertising." The App Store label lists Identifiers and Usage Data under "Data Used to Track You". You can opt out of personalized ads under the Privacy Center tab in the app's "More" menu, and request deletion through the MyFitnessPal Privacy Request Center. The policy also mentions cross-device tracking: "We and our third-party partners may use the information we collect to help us identify other devices that you use."

MyFitnessPal is owned by private equity firm Francisco Partners. If you're weighing a switch, our MyFitnessPal alternatives guide covers the other trade-offs.

Lose It!

Lose It! is made by FitNow, a Ziff Davis company, and its privacy policy is the most direct about selling. It says: "We may also sell or transfer Online Data to certain third parties such as advertisers who will use this data to serve ads that they believe are relevant to your interests." In the rights section: "Under some circumstances, we may sell or share the personal data you provide to us (excluding data that originates from Google Fit and Health Connect) to provide ads to you that align with your interests." A Texas notice adds: "We may sell your sensitive personal data, as defined under and in accordance with Texas law."

You can opt out of selling or sharing through the privacy portal or by emailing [email protected], and the website footer has a "Do Not Sell My Personal Information" link. The App Store label lists Contact Info, Identifiers and Usage Data under "Data Used to Track You".

Cronometer

Cronometer's privacy notice (last revised June 23, 2025) says "We Do Not Sell Your Personal Information" and "We do not sell PHI, or provide it to third parties without your consent." The nuance is the free tier: "For users accessing our free Services, we disclose certain limited information to Service Providers that are network advertisers, sponsors, and/or traffic measurement services ... to enable those Advertisers to serve targeted advertisements to you." It states it does not give personal health information to advertisers, and paying users "generally" won't see those targeted ads.

For AI features, Cronometer says it may use a service provider to analyze food photos, and that its Pro AI assistant sends limited information to OpenAI with your consent. You can delete information or your account in the app, or email [email protected]. Unused accounts may be deleted after 36 months of inactivity. Its App Store label lists Contact Info, Identifiers and Usage Data under "Data Used to Track You".

MacroFactor

MacroFactor's privacy notice (last updated December 1, 2025) opens with a summary: "We do not sell your Personal Data to third parties" and "we do not share your data for cross-behavioral advertising purposes. We are a premium app, and we do not need to engage in such practices." You can delete your data in the app under More, Data Management, Account & Data Deletion, and export it from the same menu. It does run its own ad campaigns on Facebook and Instagram through Meta's ad platform to promote the app. Its App Store label has no "Data Used to Track You" section.

Yazio

Yazio is a German company, and its data protection policy (version of April 2026) is written around the EU's GDPR rather than US "sale" language, so it has no statement either way about selling. It lists marketing and attribution tools including Google Ads remarketing, AppsFlyer and Apple Search Ads, and says AI features send data to AI providers such as OpenAI. When you delete your account, your email, name, profile picture and links to third-party services are "definitively and irretrievably deleted." The App Store label lists Identifiers under "Data Used to Track You".

Yazio is the one app here whose policy describes using the app "without personalized user account": an anonymous account you can later convert by adding an email. If you lose your phone, Yazio can't restore it.

FatSecret

FatSecret's privacy policy says: "Except as expressly noted in this Privacy Policy, we do not share your Personal Data with any third parties without your express consent." It shares with service providers, when required by law, or when you authorize it. It says it will not use health data from Apple HealthKit or Google Health Connect "for advertising, marketing or other use-based data mining purposes." After you delete your account, data on backup systems is destroyed or de-identified within 6 months. We found no statement about selling data and no date on the policy. Its App Store label has no "Data Used to Track You" section.

Calorie tracker that doesn't sell data: our ranking

Ranked only on what the policies and labels say, not on features:

1. MacroFactor. No sale, no cross-context ad sharing, no tracking label, in-app deletion and export.
2. Callie. No sale, sharing limited to service providers, legal and consent, no tracking label, deletion within 30 days. Deletion is by request rather than a self-serve export screen.
3. FatSecret. No sale statement, consent-based sharing, no tracking label, 6-month backup purge. Its policy is undated, which makes changes harder to follow.
4. Cronometer. Says no sale, but free-tier users get targeted advertising and the label lists tracking data.
5. Yazio. GDPR rights and an anonymous account option, but ad and attribution tools and a tracking label.
6. MyFitnessPal and Cal AI. Ad-partner sharing and cookie uses that may count as a sale.
7. Lose It! Says it may sell or share personal data for ads.

Calorie tracker without login or an account

People searching "calorie tracker that doesn't require an account" usually want to give the company as little identifying data as possible. Of the eight apps here, only Yazio's policy describes an anonymous mode. Callie, MyFitnessPal, Cal AI, Lose It!, Cronometer, MacroFactor and FatSecret all list an email address as account data.

An account is not automatically worse. It is what makes deletion requests, cross-device sync and restoring your log after a lost phone possible. What matters more is what the company does with the email once it has it, which is the question the table above answers.

How to protect your data in any calorie tracker

1. Turn off cross-app tracking on your phone. On iPhone, go to Settings, Privacy & Security, Tracking, and turn off "Allow Apps to Request to Track". On Android, go to Settings, Privacy (or Google), Ads, and delete your advertising ID.
2. Use the app's own ad settings. MyFitnessPal has ad personalization in its Privacy Center tab under "More". Cal AI has "Manage your Personalization Preferences". Lose It! has a privacy portal.
3. Send a "Do Not Sell or Share" request. If you live in California or another US state with a privacy law, use the link or email in the policy. Turning on Global Privacy Control in your browser covers the website side; the California AG says businesses must honor it.
4. Delete your account, not just the app. Removing the app from your phone deletes nothing on the company's servers. Use the in-app deletion screen or the privacy contact in the table. Deleting an account also does not cancel an App Store or Google Play subscription, as MacroFactor's policy points out; cancel that separately.
5. Think about food photos. A meal photo can carry location data in its metadata. Turn off location for the camera if you don't want it saved, and skip progress photos in any app you don't fully trust.
6. Check what you send to Apple Health. Apple's App Store Review Guideline 5.1.3 bars apps from using or disclosing HealthKit data for advertising, marketing or data mining. You can review and revoke each app's access in the Health app under your profile, Apps. Lose It! and Cal AI both carve Health Connect data out of their ad uses, and FatSecret says the same for HealthKit data.
7. Use a unique password. The 2018 MyFitnessPal breach is the reason.

When another app is the better choice

When MacroFactor is the better choice: if privacy is your deciding factor and you want self-serve deletion and export inside the app, MacroFactor's policy is the strongest one we read. It costs $71.99 a year, more than double Callie's $34.99, and we cover the full trade-off in Callie vs MacroFactor.

When Yazio is the better choice: if you don't want to give any app an email address, Yazio's anonymous account is the only option among these eight. Accept that it tracks Identifiers per its label and can't be recovered if you lose your phone.

When FatSecret is the better choice: if you want a large free tier and its consent-based sharing language is enough for you.

Callie is the better fit if you want a policy that says it doesn't sell your data, no ads, no tracking section on the App Store label, and photo, voice and text logging with a review screen before anything is saved. It costs $34.99 a year after 3 trial logs; see pricing. To compare apps on features rather than privacy, use our which calorie tracker guide. More on who builds Callie is on the about page.

Related reading

• Best MyFitnessPal alternatives in 2026
• Best Cal AI alternatives
• Which calorie tracker should you use?
• Callie pricing

Sources

1. Callie privacy policy, effective January 26, 2025 (accessed October 13, 2026). https://www.mycallie.app/en/privacy
2. Callie App Store listing, App Privacy section (accessed October 13, 2026). https://apps.apple.com/us/app/callie-ai-calorie-tracker/id6748760925
3. MyFitnessPal Privacy Policy, effective March 18, 2025 (accessed October 13, 2026). https://www.myfitnesspal.com/privacy-policy
4. MyFitnessPal App Store listing, App Privacy section (accessed October 13, 2026). https://apps.apple.com/us/app/myfitnesspal-calorie-counter/id341232718
5. Security Affairs (March 30, 2018). "Under Armour data breach affected about 150 million MyFitnessPal users." https://securityaffairs.com/70814/data-breach/under-armour-hack.html
6. Cal AI Privacy Notice, effective May 21, 2026 (accessed October 13, 2026). https://www.calai.app/privacy
7. Cal AI App Store listing, App Privacy section (accessed October 13, 2026). https://apps.apple.com/us/app/cal-ai-calorie-tracker/id6480417616
8. TechCrunch (March 2, 2026). "MyFitnessPal has acquired Cal AI, the viral calorie app built by teens." https://techcrunch.com/2026/03/02/myfitnesspal-has-acquired-cal-ai-the-viral-calorie-app-built-by-teens/
9. Lose It! Privacy Policy, page shows last updated June 24, 2026 (accessed October 13, 2026). https://www.fitnowinc.com/privacy/loseit/
10. Lose It! App Store listing, App Privacy section (accessed October 13, 2026). https://apps.apple.com/us/app/lose-it-calorie-counter/id297368629
11. Cronometer Privacy Notice, last revised June 23, 2025 (accessed October 13, 2026). https://cronometer.com/privacy/
12. Cronometer App Store listing, App Privacy section (accessed October 13, 2026). https://apps.apple.com/us/app/cronometer-calorie-counter/id1145935738
13. MacroFactor Privacy Notice, last updated December 1, 2025 (accessed October 13, 2026). https://macrofactor.com/privacy/
14. MacroFactor App Store listing, App Privacy section (accessed October 13, 2026). https://apps.apple.com/us/app/macrofactor-macro-tracker/id1553503471
15. YAZIO Data Protection Policy, version of April 2026 (accessed October 13, 2026). https://www.yazio.com/en/privacy
16. Yazio App Store listing, App Privacy section (accessed October 13, 2026). https://apps.apple.com/us/app/ai-calorie-tracker-by-yazio/id946099227
17. FatSecret Privacy Policy, undated (read via the Internet Archive capture of October 9, 2026, on October 13, 2026). https://www.fatsecret.com/privacy-policy
18. FatSecret App Store listing, App Privacy section (accessed October 13, 2026). https://apps.apple.com/us/app/calorie-counter-by-fatsecret/id347184248
19. State of California Department of Justice. "California Consumer Privacy Act (CCPA)" (accessed October 13, 2026). https://oag.ca.gov/privacy/ccpa
20. Apple. App Store Review Guidelines, section 5.1.3 Health and Health Research (accessed October 13, 2026). https://developer.apple.com/app-store/review/guidelines/