Full disclosure up front: I'm the founder of Carbsnap, which appears on this list. To keep this useful rather than promotional, every entry includes who that app is genuinely best for — and Carbsnap isn't the right answer for everyone. Prices are current as of this writing and may change.
"Best carb counting app" depends entirely on why you're counting. Insulin dosing, keto compliance, general macro awareness, and clinical data-sharing are four different jobs. Here's the list, organized by who each app actually serves best.
1. Carbsnap — best for diabetes carb counting and photo-first speed
The pitch: photograph your plate, get the carb count in about three seconds. Built with registered dietitians; accuracy methodology presented at the 2025 ADA Scientific Sessions.
What stands out: the carb-counting feature is free forever — no subscription, no account, no metering. Mixed and home-cooked meals, the ones that are miserable to log manually, are exactly what it's built for. A practitioner dashboard lets your dietitian or care team view your logged meals with your consent. And there are no trial gotchas: full meal logging is free for 7 days in-app with no payment method, then $4.99/mo or $39.99/yr if you want to keep tracking over time.
Where it's weak: no barcode scanner or recipe importer; the logging/trends layer is intentionally simpler than the big platforms; iOS and Android only (no web logging).
Best for: newly diagnosed diabetics, insulin users who need fast answers, anyone who quit manual logging out of frustration. Free on the App Store and Google Play.
2. MyFitnessPal — best database and ecosystem
The biggest food database anywhere, excellent barcode scanning, recipe importing, and integrations with nearly everything. Carb counting works, but it's one field among many in a general-purpose diary, and key features (including barcode scan) now sit behind Premium at $9.99/mo / $79.99/yr.
Best for: people who eat mostly packaged foods, want deep integrations, or already live in the MFP ecosystem. Our detailed comparison: Carbsnap vs. MyFitnessPal.
3. Carb Manager — best for keto and low-carb lifestyles
The most complete keto platform: net-carb tracking, meal plans, recipes, fasting timers, challenges, glucose/ketone logging. Around $8.49/mo or $39.99/yr for Premium. If your carb question is "how do I stay under 20g for ketosis," this is the purpose-built answer.
Best for: keto and strict low-carb as a lifestyle. Our detailed comparison: Carbsnap vs. Carb Manager.
4. mySugr — best diabetes logbook (carbs alongside glucose)
mySugr approaches from the opposite direction: it's a diabetes logbook first — glucose readings, insulin doses, moods — with carb entry as one field per meal. Charming design, strong Accu-Chek integration (free Pro with their meters), and inexpensive otherwise (~$2.99/mo). It won't tell you the carbs in your food; it's where you record the number once you know it.
Best for: people who want glucose, insulin, and carbs in one diabetes-centric diary — potentially alongside a carb-estimation tool.
5. Cronometer — best for nutrition-data precision
The nutrition nerd's choice: lab-grade data sources, micronutrients, and accuracy standards stricter than any mainstream tracker. Manual-entry workflow, steeper learning curve, free tier available with Gold at ~$8.99/mo.
Best for: people who want maximum data fidelity across all nutrients — not just carbs — and don't mind the manual effort.
6. MacroFactor — best for macro coaching and body-composition goals
A macro tracker with an adaptive coaching algorithm that adjusts your targets based on your logged intake and weight trend. Fast logging UX, science-forward team, ~$11.99/mo or $71.99/yr, no free tier. Carbs are tracked as part of the macro picture rather than being the focus.
Best for: lifters and body-composition-focused users who want their targets managed for them.
What premium actually costs
The quick chooser
| Your situation | Start with |
|---|---|
| Newly diagnosed, learning to count carbs | Carbsnap (free carb counting) + your care team |
| Dosing insulin, eating varied/home-cooked meals | Carbsnap, possibly logging into mySugr |
| Keto or strict low-carb lifestyle | Carb Manager |
| Mostly packaged/barcoded foods | MyFitnessPal |
| Precision across all nutrients | Cronometer |
| Macro coaching for body composition | MacroFactor |
A note on free trials and billing
One thing to watch in this category in 2026: several photo-AI calorie apps have drawn scrutiny — including removal from the App Store — over confusing trial-to-paid billing. Whatever app you choose, check whether its "free trial" requires a payment method up front and converts automatically. (Carbsnap's position: carb counting is free forever, the logging trial requires no payment method, and a subscription only starts when you deliberately start it. We think that should be the norm.)
New to all of this? Start here: How to Count Carbs When You're Newly Diagnosed.