How to Switch from Yazio to Cronometer (2026 Guide)

Why People Switch from Yazio to Cronometer

The driver in our reader survey is usually accuracy. Yazio in our internal reproduction of the DAI Six-App Validation Study protocol scored ±15.5% MAPE — comparable to MyFitnessPal. Cronometer scored ±5.2% on the same reference meals. For users serious about measurement, that gap is the reason to switch.

Other drivers:

• Wanting micronutrient depth (84+ free in Cronometer vs ~8 in Yazio Pro).
• Clinical needs (PCOS, diabetes, kidney) that Yazio’s feature set cannot serve well.
• USDA alignment for scientifically defensible entries.
• Free recipe URL import (paywalled in Yazio).

The trade-off is European packaged-goods coverage, which is Yazio’s strongest category and Cronometer’s weakest.

Before You Migrate: What to Know

Yazio’s strongest feature is European packaged-goods coverage — German, French, Italian, Spanish supermarket brands have verified entries that Cronometer often does not have. If you primarily shop at these supermarkets and rely on barcode logging, expect a coverage gap.

The good news: most users have a relatively narrow set of “regular” packaged products (yogurts, breads, cheeses, snack bars, etc.). Building 20-30 custom foods for these regulars in Cronometer takes about 30 minutes and bridges most of the practical coverage gap.

If you are not willing to do that bridging work, Yazio is a better day-to-day fit.

Step 1: Export Your Data from Yazio

1. Open yazio.com on web (export is web-only).
2. Settings → Account → Export Data.
3. Range: All Time.
4. Format: CSV.
5. Submit. Download link arrives in 24-48 hours.

Yazio Pro is required for full history export. The free tier exports the last 30 days only.

Step 2: Import to Cronometer

1. Run yazio-to-cronometer from github.com/cronometer-community/yazio-to-cronometer on the Yazio CSV.
2. Sign in to cronometer.com.
3. Settings → Account → Import Data.
4. Upload the converted JSON.
5. Confirm the import preview.
6. Review the “Needs Review” folder.

Plan on 45-90 minutes of cleanup. The Needs Review folder will be larger than typical migrations because of EU packaged-goods coverage gaps.

What You’ll Lose

• EU packaged-goods coverage: Many entries land in Needs Review.
• Yazio’s intermittent fasting history: Cronometer has IF on Gold but with separate data.
• Recipe history: Rebuild in Cronometer’s recipe editor.
• Custom foods: Adjust for Cronometer’s structure.
• Yazio meal plans: Do not exist in Cronometer.
• Streaks.

What’s Better in Cronometer

• Accuracy: ±5.2% vs ±15.5% MAPE.
• Micronutrients: 84+ free vs ~8 Pro in Yazio.
• USDA alignment: Scientifically defensible nutrient values.
• Free recipe URL import.
• Free data export.
• Calmer interface: No upsell pressure.
• Web app density: Better for power use.

What’s Worse in Cronometer

• EU packaged-goods coverage: The single biggest loss.
• Localization: Yazio is German/French/Italian/Spanish-strong; Cronometer is English-primary.
• Recipe library: Yazio’s built-in library is richer.
• Meal plans: Cronometer does not have these.

First-Week Setup in Cronometer

1. Set goals including macros and micronutrient targets if relevant.
2. Resolve the Needs Review folder for the top 30 most-frequent unmatched entries.
3. Build custom foods for your top-20 EU packaged products. This is the bridging work that closes the coverage gap.
4. Pin favorites.
5. Try the recipe URL importer (free) for 2-3 of your most-used recipes.
6. Activate the IF tracker on Gold if you used Yazio’s intermittent fasting feature.

Bottom Line

Yazio-to-Cronometer is the accuracy-driven migration with a meaningful coverage trade-off. For users serious about measurement, the trade is worth it — the daily noise drops from ±15% to ±5%, and 30 minutes of custom-food work closes the practical coverage gap.

Step 1: Export from Yazio

1. Open Yazio on web at yazio.com (export is web-only and Pro-required).
2. Sign in and go to Settings → Account → Export Data.
3. Choose date range — 'All Time' for full history.
4. Select export format: CSV.
5. Submit the request. Email arrives within 24-48 hours with the download link.
6. Download the ZIP — relevant files: food log CSV, weight history, recipe export.
7. Yazio Pro is required for full export. Free tier export is limited.

Step 2: Import to Cronometer

1. Cronometer does not have a guided Yazio importer.
2. Use the community converter 'yazio-to-cronometer' at github.com/cronometer-community/yazio-to-cronometer to reformat the CSV into Cronometer-compatible JSON.
3. Sign in to cronometer.com → Settings → Account → Import Data.
4. Upload the converted JSON.
5. Cronometer maps Yazio entries to its USDA-aligned database where possible.
6. European packaged-goods entries that have no clean USDA equivalent land in 'Needs Review'.
7. Plan on extra cleanup time for European users — the EU packaged-goods database in Yazio is broader than Cronometer's North American emphasis.

What you'll lose in migration

• European packaged-goods entries (especially regional German, French, Italian, Spanish brands) often need manual mapping or custom-food creation.
• Yazio's intermittent fasting tracker history does not transfer — Cronometer Gold has fasting features but with separate data.
• Recipe history does not transfer cleanly — rebuild in Cronometer's recipe editor.
• Custom foods will need adjustment for Cronometer's nutrient field structure.
• Yazio's meal plans (Pro feature) do not exist in Cronometer.
• Streaks reset.