Keto tracking has one hard requirement that most general nutrition apps weren't built for: net carbs. Total carbs — the number on most nutrition labels and general-purpose apps — includes fiber, which your body doesn't absorb. On keto, counting fiber against your daily limit is unnecessarily restrictive and makes otherwise excellent foods look off-limits.
This guide covers the tools that get net carb tracking right, what each is best for, and where they fall short — so you can build a stack that works for your actual routine rather than against it.
New to net carbs? Read our guide on what net carbs are and how they work on keto before diving into tracking tools.
Before comparing specific tools, here are the criteria that separate a keto-capable tracker from a generic calorie counter:
CheckTheCarbs is built specifically around one problem: knowing exactly how many net carbs are in a food before you eat it. Every page shows USDA-verified net carbs, keto scores, and full macros for a 100g serving — no account required, no ads in the way.
It covers 300,000+ foods across fruits, vegetables, grains, snacks, fast food, dairy, proteins, and more. It is the fastest way to answer "can I eat this on keto?" before a meal or at the grocery store. Pair it with the free Keto Macro Calculator to set your daily targets first.
Cronometer is the gold standard for accurate nutrition data among serious trackers. Unlike apps that rely on crowdsourced entries, Cronometer uses USDA and verified research databases as its primary source. It tracks not just macros but 82 micronutrients — useful on keto, where electrolyte depletion (sodium, potassium, magnesium) is a common issue.
The free tier shows net carbs natively and allows custom macro targets. The paid Gold tier ($8.99/month) adds a fasting timer, blood glucose tracking, and more detailed reporting — useful for those managing ketosis closely.
Carb Manager is the most popular dedicated keto app, and it earns that position. The entire interface is built around net carbs — it's the primary number shown, not an afterthought. The food database is large and includes restaurant menu items and branded packaged foods. The free tier covers daily logging, net carb tracking, and basic macro targets.
The premium tier ($12.99/month or $69.99/year) adds a meal planner, fasting tracker, keto recipes, and a more detailed progress dashboard. Worth it if you want a single all-in-one keto app; unnecessary if you only need accurate food lookup and logging.
MyFitnessPal has the largest food database of any app — over 14 million entries — and the most recognisable brand in nutrition tracking. However, it was not built with keto in mind. The app tracks total carbs by default and does not subtract fiber automatically. You can calculate net carbs manually, but you'll be doing that arithmetic for every food, every day.
The database quality is also inconsistent: because most entries are user-submitted, errors are common, particularly for restaurant items and international foods. For general calorie and macro tracking on a standard diet, it is fine. For strict net carb tracking on keto, it creates unnecessary friction.
| Tool | Net carbs native | Verified data | Free tier | Best for |
|---|---|---|---|---|
| CheckTheCarbs | Yes | USDA only | Fully free | Quick food lookups |
| Cronometer | Yes | USDA + research | Core features | Micronutrient tracking |
| Carb Manager | Yes | Mixed | Limited | All-in-one keto app |
| MyFitnessPal | No | User-submitted | Limited | General calorie tracking |
No single tool does everything perfectly. Most consistent keto dieters use two tools in combination: