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Nutrition apps and supplements, ranked

Six brands, each used for at least three weeks and scored on the same eleven points. Prices are the real US cost: monthly or yearly for apps, the subscription rate for supplements.

1 Levels Top 2025
4.8 / 5
US price
$199/mo
Type
Metabolic health & CGM
Best for
Data-driven
Try it
Annual plan

A glucose monitor and app that show what each meal does to your blood sugar. The most insight of the six, at the highest price.

2 Noom
4.7 / 5
US price
From $70/mo
Type
Behavior-change coaching
Best for
Committed
Try it
Trial offer

Daily psychology lessons that outshine the tracker itself. Expensive and upsell-heavy, but the coaching worked on us.

4.6 / 5
US price
$19.99/mo
Type
Calorie & food tracker
Best for
All levels
Try it
Free plan

A vast food database that turns logging a packaged meal into a single search. The reason it stayed open at dinner.

4.5 / 5
US price
$44.99/yr
Type
Meal plans & tracking
Best for
Beginner
Try it
Free plan

The most approachable tracker, with guided meal plans for people who want a path rather than a spreadsheet.

4.4 / 5
US price
$9.99/mo
Type
Micronutrient tracker
Best for
Label-readers
Try it
Free plan

The deepest micronutrient tracking of the six, at the lowest monthly price. Built for people who read labels.

6 AG1
4.3 / 5
US price
From $79/mo
Type
Daily greens powder
Best for
Everyday
Try it
Subscription

A scoop that bundles vitamins and probiotics into one drink. Convenient, and priced as the premium habit it sets out to be.

Reading the ranking

The score weighs how easily the habit stuck, how the product felt day to day, how it handled your data, and what you get for the money. A cheaper pick does not automatically beat a costly one: Levels leads on the insight it gave us, not on price, and Cronometer wins value at a fraction of the cost. Each review breaks the score down point by point on a one-to-ten scale.

See how we rank

Talk to a doctor before starting a new diet or supplement routine, especially if you are pregnant or managing a health condition. This site offers editorial comparisons, not medical advice.