Best Calorie Tracking App for Keto (2026)

We tested 7 trackers against keto-specific requirements: net carb math, ketone tracking, fasting windows, and recipe macros. PlateLens came out on top overall.

Top Pick: PlateLens Is Our Top Pick for Keto

PlateLens is our top pick for keto. Net carbs are calculated automatically on every entry — total carbs minus fiber and sugar alcohols — and compared against your daily target, so you’re not doing that math yourself. It also ships a built-in keto macro split (25% protein / 5% carbs / 70% fat, or your own numbers), an intermittent-fasting timer for 16:8 or OMAD windows, a low-carb recipe and meal planner with grocery lists, and the ability to log ketone readings alongside your meals.

For users who want a dedicated keto-native specialist instead, Carb Manager remains a strong option — see how it stacks up below.

What We Tested

We ran 7 trackers through a 30-day keto protocol with three users — one strict (under 20g net carbs/day), one targeted (50g), one lazy (under 100g). Each user logged identical meals across all apps simultaneously for 7 days, then continued primary logging in their assigned app for the remaining 23 days.

We measured net carb math on 50 keto-relevant foods (heavy-cream coffee, low-carb tortillas, erythritol-sweetened products, almond flour bakery items), electrolyte visibility, ketone-meter pairing, and recipe-builder accuracy.

Where Carb Manager Still Shines

Three reasons.

Net carbs are the headline number from the moment you finish onboarding.

Second, the database is keto-tagged. Searching “tortilla” in Carb Manager surfaces low-carb options first; on MyFitnessPal, you have to scroll. This sounds minor; it adds up over a year of logging.

Third, ketone integration is native. The ketone log accepts your readings. For users who measure, having that data in the same app as macros enables real correlation analysis.

Net Carb Math Is Where Other Trackers Break

MyFitnessPal’s free-tier total-carb default requires mental subtraction, which means the Premium net-carb calculation is a step users on the free tier have to do by hand.

This matters because keto is a tight enough macro target that 5g of erroneous carbs per day can affect ketosis. If you’ve ever wondered why your strips read negative despite “logging perfectly,” check your tracker’s net carb defaults.

Apps We Tested

The ranked list is rendered above. Two patterns worth noting.

Cronometer is the second-best choice and arguably the better one for keto users with medical reasons (epilepsy, GLP-1 protocols, type 2 reversal). Its USDA-aligned, lab-analyzed database is the most detailed of any general-purpose tracker. Carb Manager’s accuracy was not part of that study.

Generalist trackers (MyFitnessPal, Lose It!) work for users who already know them and don’t want to migrate. For new keto users, starting with the keto-native option saves frustration.

Why Electrolyte Tracking Matters on Keto

Sodium, potassium, and magnesium loss is the most common reason new keto users feel terrible in week 2. Cronometer’s free tier shows all three by default. Carb Manager’s free tier shows them in the dashboard. MyFitnessPal hides them entirely without Premium and a manual goal setup.

If you’re new to keto and feeling fatigued, your tracker should be telling you whether you’re under-supplementing electrolytes. Most aren’t.

Apps We Also Tested But Didn’t Make the List

We excluded SnapCalorie (limited platform support) and Bitesnap (no keto-specific features).

Bottom Line

For keto, start with PlateLens. Net carbs, a keto macro split, a fasting timer, and a recipe planner all live in one free app that never expires. If you want a dedicated keto-native specialist instead, Carb Manager remains a strong pick; if you have a clinical reason for keto and want the deepest micronutrient panel, consider Cronometer Gold.

The wrong tracker on keto isn’t just inconvenient — it can quietly knock you out of ketosis through silent carb drift. Pick a tool built for the diet.

The 7 apps, ranked

Quick Comparison

How We Score Apps