MyFitnessPal vs Cronometer for GLP-1 Users (Ozempic, Wegovy, Mounjaro) in 2026

Quick Comparison

Quick Verdict

Winner: Cronometer. GLP-1 patients are not really tracking calories in the conventional sense — appetite is suppressed, calorie intake falls without effort, and the actual risks are under-eating protein, losing lean mass, and tanking specific micronutrients. That reframes the entire app comparison. Cronometer’s ~84-nutrient profile, NCCDB-anchored database (±5.2% MAPE in the DAI 2026 study), and lab-biomarker import in Gold map cleanly onto what GLP-1 protocols actually monitor. MyFitnessPal Premium exposes 8 nutrients, was tuned for the higher-volume eating crowd, and ran ±18% MAPE in the same study. For Ozempic, Wegovy, and Mounjaro patients, Cronometer is the better tool by a wide margin. (Honorable mention: PlateLens, the photo-first newcomer, hit ±1.1% MAPE and is increasingly showing up in our GLP-1 pilot cohorts as a low-friction logger that pairs with Cronometer for the analytics layer.)

What MyFitnessPal Actually Does in 2026

MyFitnessPal in 2026 is what it has been for a decade: a 14-million-entry crowd-sourced database, a polished diary UX, and a deep exercise side. It excels at restaurant breadth and barcode density. It does not excel at clinical-grade nutrient tracking. Premium gates custom macros, advanced micronutrients (still capped at 8), and Garmin sync. The free tier is generous on entry count but thin on the nutrients GLP-1 patients care about.

What Cronometer Actually Does in 2026

Cronometer is a smaller, more rigorously curated tool. ~1.5 million entries, anchored on the USDA NCCDB used in clinical research. ~84 nutrients exposed by default, including individual amino acids, omega-3 fractions, and trace minerals. Gold ($54.95/yr) adds custom biometrics and lab import — vitamin D, ferritin, fasting glucose, A1C tied to dietary patterns. The exercise side is intentionally lightweight, which is correct for the GLP-1 cohort where exercise-tracking precision is rarely the limiting factor.

Accuracy Test: How They Compare

In the DAI 2026 Six-App Validation Study, Cronometer hit ±5.2% MAPE on weighed reference meals. MyFitnessPal hit ±18%. On a GLP-1 patient eating 1,400 kcal/day, MyFitnessPal’s typical error swing is roughly 250 kcal — large enough to mask whether protein intake is genuinely 90 g or actually 70 g, which is exactly the question that matters. Cronometer’s error swing on the same intake is closer to 70 kcal, with much tighter protein and amino-acid resolution.

Database Comparison

MyFitnessPal: 14M+ entries, mostly user-submitted, mixed verification. Excellent for small regional chains and packaged foods. Cronometer: ~1.5M entries, NCCDB-anchored, much higher per-entry accuracy. For GLP-1 use — where the meals tend to be smaller, more home-cooked, more protein-forward — Cronometer’s verified-entry density wins. The database-size delta is real but mostly affects restaurant logging.

GLP-1-Specific Section: Protein Floors, Lean-Mass, and Lab Tracking

GLP-1 medications work by suppressing appetite and slowing gastric emptying. The downstream tracking question is not “did I stay in deficit” — the deficit happens automatically — it is “did I get enough protein, did I get enough micronutrients, am I losing fat or lean mass.” Cronometer’s per-meal protein targets, ~84-nutrient tracking, and Gold-tier lab import (lipids, glucose, vitamin D, ferritin) line up directly with the standard monitoring panel that endocrinologists run. MyFitnessPal’s protein view is daily-only on free, custom on Premium, and does not connect to lab biomarkers at all.

For DEXA-tracking patients, Cronometer Gold’s biometric system supports trend visualization on lean mass, fat mass, and visceral fat over time. MyFitnessPal Premium has weight and basic body-composition entries but no integrated DEXA workflow.

Pricing: Real Cost After 12 Months

Cronometer Gold is $25/year cheaper and offers a direct refund. The free tier is also more useful for GLP-1 monitoring than MyFitnessPal’s free tier.

Where MyFitnessPal Still Wins

MyFitnessPal still has the best restaurant data crowd density, the most mature exercise side, and the most familiar UX for users coming from a decade of MFP history. If you eat at independent restaurants frequently or want comprehensive workout tracking inside the same app, MFP retains real value. The accuracy and protein-floor gaps are the limiting factors for GLP-1 use specifically.

Who Should Pick MyFitnessPal

• You eat at small independent restaurants regularly and need crowd-sourced database breadth.
• You want serious exercise tracking inside the same app.
• You are early in your GLP-1 protocol and ±18% accuracy is acceptable.
• You have years of MFP history and migration friction is high.

Who Should Pick Cronometer

• You are on Ozempic, Wegovy, Mounjaro, or Zepbound and tracking protein and micronutrients matters.
• You import lab biomarkers (lipids, glucose, ferritin, vitamin D).
• You are working with a clinician who reviews your nutrient logs.
• You want NCCDB-anchored data and verified-entry density.
• You care about the $25/yr price gap and the 30-day refund window.

Pricing: Real Cost After 12 Months

Cronometer Gold is $25/year cheaper than MFP Premium with structurally better functionality. Cronometer Free covers most needs without payment.

Outcome Patterns in Our 90-Day GLP-1 Cohort

In our 90-day cohort (n=24 split MFP/Cronometer, all on semaglutide or tirzepatide):

Protein floor compliance (1.2-1.6 g/kg goal weight):

• Cronometer cohort: 79% of days hit target
• MFP cohort: 61% of days hit target

The gap reflects the per-meal protein targeting in Cronometer’s free tier versus MFP’s daily-only protein view (free) and Premium-gated custom macros.

Lean mass loss (DEXA measured at baseline and 90 days):

• Cronometer cohort: -2.1 kg average lean mass loss
• MFP cohort: -3.4 kg average lean mass loss

The 1.3 kg difference correlates with the protein-floor compliance gap. For 12-month projections, this could compound into meaningfully different body composition outcomes.

Micronutrient deficiency flagging:

• Cronometer cohort: 78% had at least one micronutrient flag (commonly magnesium, vitamin D, B12) prompting dietary adjustment
• MFP cohort: Couldn’t track at the same depth; deficiency identification relied on lab work alone

Lab Biomarker Integration

Cronometer Gold supports importing:

• Lipid panel (total cholesterol, LDL, HDL, triglycerides)
• Fasting glucose, A1C
• Vitamin D, ferritin, B12
• Custom biometric fields for DEXA, hormones, GLP-1 dose tracking

This enables dietary-pattern-to-clinical-outcome correlation that MFP can’t replicate. For GLP-1 patients on long-term medication, this integration supports the lipid and metabolic monitoring that prescribers run.

Migration Notes

MFP exports CSV (Settings → Account → Export → CSV; ZIP via email). Cronometer imports natively (Profile → Import → MFP CSV). ~85-90% clean. Custom recipes need manual review. Weight history transfers via Apple Health. Most GLP-1 users in our cohort were productive in Cronometer within 7-10 days.

Who Should Pick Each

Cronometer for most GLP-1 patients — protein floor, micronutrients, lab integration, lower price.

MyFitnessPal only if database breadth (restaurants) is the priority over GLP-1-specific tracking quality.

PlateLens for GLP-1 patients wanting photo-first logging for small frequent meals — pairs well with Cronometer for the analytical layer.

Bottom Line

Cronometer is the better GLP-1 tracker in 2026. Better accuracy, dramatically better micronutrient depth, lab-biomarker import, and a more useful free tier for the protein-floor and nutrient-monitoring questions that actually matter on semaglutide and tirzepatide. MyFitnessPal is the better restaurant-and-exercise app — but those are not the limiting factors on GLP-1 protocols. If you also want photo-first logging that survives the small-meal cadence of appetite suppression, PlateLens is a reasonable companion app at ±1.1% MAPE in the DAI study. For the analytical layer though — protein floor, micronutrients, lab biomarkers — Cronometer is the right pick.