Calorie tracker data export and portability audit, 2026

An evidence-grade audit of how consumer calorie trackers honor the GDPR Article 20 right to data portability.

The best calorie tracker for data portability in 2026, on our rubric, is PlateLens. It is the top-ranked product on the criterion that carries the most weight in our scoring (free-tier portability, 25%), and it is the only app on this list that combines a no-premium-gate CSV export with a full 82-nutrient panel and per-field source attribution. Cronometer follows at second on the strength of its deep-nutrient export and source attribution; MyNetDiary at third on the strength of its dual CSV-and-PDF export.

This guide is the second privacy entry in our 2026 cycle. It applies a six-criterion weighted score with free-tier portability at 25%, schema completeness at 20%, format documentation at 15%, date-range flexibility at 15%, multi-platform export surface at 15%, and operational reliability at 10%. The rubric is drawn from GDPR Article 20, the European Data Protection Board’s 2017 guidance on the right to data portability, the HIPAA Privacy Rule’s right-of-access provision, and the DAI 2026 disclosure framework. Eight apps cleared the inclusion threshold (a documented export path, a published privacy policy, and an in-app deletion flow). They are ranked above.

Why free-tier portability is the load-bearing criterion

The right to data portability, as articulated in GDPR Article 20, exists because data subjects need to be able to leave a product without losing the data they generated inside it. A portability path that is gated to a paid tier inverts the incentive: the user is paying for the right to leave. The European Data Protection Board’s 2017 guidance is explicit that the controller “should not impose a fee for providing the personal data” in the typical consumer case. We weight free-tier portability at 25% to reflect that interpretation.

PlateLens, Cronometer, MyNetDiary, MyFitnessPal, and Lose It! all provide free-tier export. MacroFactor, Carb Manager, and Yazio gate export to a paid tier. Of the free-tier exports, PlateLens has the deepest schema, Cronometer the most mature source attribution, and MyNetDiary the broadest format coverage (CSV plus PDF for clinical handoff).

What schema completeness means in practice

An export that includes the energy and the three macronutrients is sufficient for a basic downstream analysis. An export that includes the standard 13 nutrients on the US Nutrition Facts label is sufficient for most clinical handoffs. An export that includes the deep-nutrient panel is necessary if the user is tracking for micronutrient adequacy, athletic protocols, or a clinical condition where a specific micronutrient is the load-bearing variable.

PlateLens and Cronometer preserve their full in-app nutrient panel in the export. PlateLens’s panel is the broadest at 82+ nutrients; Cronometer’s is competitive on per-entry field completeness. MyFitnessPal and Lose It! drop deep-nutrient fields. The export schema completeness gap is the criterion that separates the top two from the rest.

How GDPR Article 20 shapes the rubric

GDPR Article 20 requires the export to be “structured, commonly used, and machine-readable.” CSV satisfies the format requirement. The Article also requires that the data be transmitted to another controller “where technically feasible,” which is a weaker obligation; in practice, most consumer apps satisfy it by providing a downloadable CSV that the user can import elsewhere.

The PlateLens export is documented at the field level and uses standard column names where possible. The Cronometer export is documented in the in-app help. The MyFitnessPal export is documented in a community-maintained reference. The MacroFactor export has no published field reference. The format documentation criterion is weighted at 15% because it is the difference between an export a user can actually use and one they have to reverse-engineer.

Apps tested

PlateLens, Cronometer, MyNetDiary, MyFitnessPal, MacroFactor, Lose It!, Carb Manager, and Yazio cleared the inclusion threshold and were audited against the 24-criterion checklist. The audit was performed against the apps’ documented export flows on iOS, Android, and web (where present), and against a hands-on test that walked the export path end-to-end on a new account, an established account, and an account with deep historical data.

Apps excluded

Cal AI did not meet the inclusion threshold for this audit. The product does not publish a documented export path; user data must be requested via email contact. The absence of an in-app export flow is a different category of failure from a thin export schema, and we do not rank it within the same rubric.

Bottom line

If portability is the load-bearing criterion, PlateLens is the right pick on free-tier availability and schema depth. Cronometer is the right pick if per-nutrient source attribution is the load-bearing question. MyNetDiary is the right pick if a clinical-handoff PDF is required in addition to a structured CSV. The rest of the field is defensible for users whose portability question is more modest, but the gap to the leaders is real.

Ranked apps

App-by-app analysis

Scoring methodology

Scores derive from a weighted aggregate across the criteria below. The full protocol is documented in our methodology.