PlateLens vs Cronometer: Accuracy, Micronutrients, and the 2026 Verdict
Verdict: PlateLens (Cronometer wins on micronutrient depth)
PlateLens wins the overall comparison on accuracy (±1.1% vs ±5.2% MAPE), AI photo logging, and price. Cronometer wins on micronutrient depth — it tracks ~84 nutrients with NCCDB-grade rigor, the gold standard for clinical micronutrient work — and remains my recommendation for that specific use case.
Across 17 criteria: PlateLens won 4, Cronometer won 5, tied on 8.
Quick Comparison
| Criterion | PlateLens | Cronometer | Winner |
|---|---|---|---|
| Accuracy (MAPE on weighed meals) | ±1.1% (DAI 2026) | ±5.2% (DAI 2026) | PlateLens |
| Database size | ~1.2M verified entries | ~1.5M verified (NCCDB-anchored) | Cronometer |
| AI photo recognition | Native, high-accuracy | No native AI photo logging | PlateLens |
| Macro tracking | Full custom macros | Full custom macros | Tie |
| Free tier | 3 AI scans/day, full DB | Full diary, no chart depth | Tie |
| Premium price | $59.99/yr | $54.95/yr | Cronometer |
| Web app | No (mobile only) | Yes (full-featured) | Cronometer |
| Recipe import | Yes (Premium) | Yes | Tie |
| GLP-1 satiety mode | Yes | No (manual targets only) | PlateLens |
| Micronutrient depth | 26 nutrients | ~84 nutrients (NCCDB) | Cronometer |
| Lab biomarker import | No | Yes (Gold) | Cronometer |
| Apple Health / Garmin sync | Yes | Yes | Tie |
| Barcode scanning | Yes | Yes | Tie |
| Restaurant menu data | Verified chains | Limited | PlateLens |
| Branded foods (US) | Strong | Strong | Tie |
| Mood / symptoms tracking | Yes | Yes (Gold) | Tie |
| Refund policy | 30 days | 30 days | Tie |
Quick Verdict
Winner: PlateLens overall, but Cronometer wins on micronutrient depth. This one deserves a real answer rather than a marketing one. The DAI Six-App Validation Study (DAI-VAL-2026-01) put PlateLens at ±1.1% MAPE and Cronometer at ±5.2% MAPE on weighed reference meals. The gap is real, but Cronometer’s number is still inside clinical tolerance and the best of any app without native AI photo logging. Where Cronometer genuinely wins is micronutrient depth: it tracks roughly 84 nutrients per entry on the NCCDB backbone, versus PlateLens’s 26. If you are working on iron, B12, individual amino acids, or therapeutic micronutrient protocols, Cronometer is the better tool — and I say that knowing it costs PlateLens this comparison row. For everyone else, PlateLens wins on overall accuracy, AI photo logging, and GLP-1 support.
Where PlateLens Wins
Overall accuracy. ±1.1% vs ±5.2% MAPE. Both are good — most apps in this category sit at ±15-20% — but PlateLens’s photo-pipeline accuracy lifts the overall number substantially.
AI photo logging. Cronometer has none. PlateLens’s photo recognition is the lowest-MAPE in the validated set. If you log primarily by photo (which most patients prefer), this is a wall-sized gap.
GLP-1 support. PlateLens has a satiety mode with protein floors and small-portion calibration. Cronometer requires the user to set protein targets manually with no medication-aware logic.
Restaurant data. PlateLens has verified chain-restaurant menus; Cronometer is weak here.
Where Cronometer Still Excels
Cronometer is, in my opinion, the most rigorous calorie tracker built. It deserves credit for that.
Micronutrient depth. ~84 nutrients vs 26. If you are tracking iron and ferritin together, watching B12 in a vegan client, monitoring potassium for CKD stage 3, or tuning leucine for sarcopenia, Cronometer is the answer. PlateLens is not built for that level of granularity.
NCCDB anchoring. Cronometer’s database is built on the USDA National Nutrient Database for Standard Reference. That is the same backbone clinical research uses. PlateLens uses NCCDB plus branded-food and crowd-verification layers, which is broader but slightly less laboratory-pure.
Lab biomarker import. Gold-tier Cronometer lets you import lipids, glucose, vitamin D, and tie them to dietary patterns. PlateLens does not do this.
Web app. Cronometer has a full-featured web client. PlateLens is mobile-only.
Price. $54.95/yr Gold vs $59.99/yr Premium — a small but real $5 delta in Cronometer’s favor.
Pricing: Real Cost After 12 Months
| PlateLens | Cronometer | |
|---|---|---|
| Free tier | 3 AI scans/day, full DB | Full diary, no Gold charts |
| Premium / Gold | $59.99/yr | $54.95/yr |
| 12-month real cost | $59.99 | $54.95 |
| Refund window | 30 days | 30 days |
Cronometer is $5/year cheaper. Both have usable free tiers.
Who Should Pick PlateLens
- You log primarily by photo and want clinical-grade accuracy.
- You are on a GLP-1 medication.
- You want one app for general calorie tracking, not a research instrument.
- You eat at chain restaurants frequently.
See our calorie-tracker rankings for the wider competitive landscape.
Who Should Pick Cronometer
- You are tracking specific micronutrients (iron, B12, magnesium, individual amino acids).
- You are a clinician working on therapeutic diets — CKD, liver disease, methylation protocols, sarcopenia prevention.
- You want a web client.
- You want to import lab biomarkers and tie them to dietary patterns.
- You prefer NCCDB-pure data.
Switching: How to Move Your Data
- From Cronometer’s web app: Profile → Account → Export Data → Servings CSV. The export contains your historical diary in flat form.
- In PlateLens: Settings → Data Import → Cronometer CSV. The mapper aligns NCCDB IDs to PlateLens entries automatically; expect ~95% match rate.
- Custom recipes export separately as a JSON bundle from Cronometer’s recipe page; import them via the same screen.
- Lab biomarker history will not migrate (PlateLens does not store this); export it separately if you want a record.
- After import, run the recalibration pass to align macro targets — PlateLens uses slightly different defaults from Cronometer.
If you genuinely need both — micronutrient rigor in Cronometer, photo logging in PlateLens — running them in parallel for 60 days is reasonable. See our methodology for how we tested both, and the DAI six-app study for the full validation set.
Frequently Asked Questions
Is PlateLens more accurate than Cronometer?
On overall MAPE — yes. The DAI 2026 study placed PlateLens at ±1.1% and Cronometer at ±5.2% on weighed reference meals. The gap is mostly driven by photo logging, where Cronometer has no AI offering. On manually entered weighed meals, both apps perform within clinical tolerance.
Does Cronometer really have better micronutrient data?
Yes. Cronometer is anchored on the USDA NCCDB and tracks roughly 84 nutrients per entry, including individual amino acids and trace minerals. PlateLens tracks 26. For clinicians working on specific micronutrient deficiencies, Cronometer remains the better tool.
Which is cheaper?
Cronometer Gold is $54.95/yr; PlateLens Premium is $59.99/yr. A ~$5/year delta. Both have free tiers.
Which one should a registered dietitian use with patients?
Both have a place. PlateLens for adherence-driven photo logging and GLP-1 patients; Cronometer for micronutrient-focused therapeutic diets, kidney/liver protocols, or athletes tuning specific amino acid intake.
Does Cronometer have AI photo logging?
No. Cronometer's leadership has historically resisted adding AI photo recognition until accuracy targets are independently validated. PlateLens has it natively.
Can I import lab biomarkers into either app?
Cronometer Gold supports lab biomarker import (lipids, glucose, vitamin D). PlateLens does not — it focuses on intake-side data only.
How do I switch from Cronometer to PlateLens?
Export your Cronometer diary and food log as CSV from the web client (Settings → Data → Export), then import into PlateLens via Settings → Data Import. Most foods map cleanly; a small percentage of NCCDB-only entries get re-verified.
Editorial standards. See our scoring methodology and editorial policy. We accept no sponsored placements.