Skip to content
glp1.howSign in

Cronometer

A detailed food tracker that covers protein, fiber, and micronutrients as well as calories, useful for spotting the nutrition gaps that are common during GLP-1 treatment.

Updated Sep 26, 2026

Cronometer tracks protein, fiber, and micronutrients as well as calories. That detail makes it useful for spotting the nutrition gaps that are common during GLP-1 treatment.

What Cronometer is

Cronometer (external link) is a food and nutrient tracking app. It logs your meals against a detailed nutrient database that covers protein, fiber, and dozens of individual vitamins and minerals, along with calories. It's more granular than most mainstream calorie counters, and that granularity is what makes it useful on a GLP-1.

As of September 2026, Cronometer runs on the web, iOS, and Android. The free Basic plan tracks 84+ nutrients and includes custom macro and micronutrient targets, a barcode scanner, and a 7-day window for reports and charts. Gold costs $10.99 a month or $59.99 a year and removes ads. It adds unlimited history, custom charts, a recipe importer, photo and voice logging, and a fasting timer, among other features (prices from Cronometer's Gold page (external link)).

Why it's relevant on a GLP-1

When your appetite drops, total intake can shrink so much that hitting protein and fiber targets inside that smaller amount is hard to judge by feel. Recent studies show how often this happens. In a 2026 study of 387 adults on GLP-1 or GIP/GLP-1 medications who kept two-day food diaries, average intake was 753 kcal a day with 7.2 g of fiber, and fewer than 10% met recommended protein intakes (Korus 2026, J Transl Med (external link)). In an Italian study of adults with type 2 diabetes, none of the 52 GLP-1 users met fiber recommendations (Ponzo 2025, Nutrients (external link)). Our guide on protein, fat, and carbohydrates covers why each one matters.

An app that shows where you stand against a fiber goal or a protein target gives you something a calorie count can't. Protein targets for weight loss are often set at 1.2–1.6 g/kg/day, the range a review in the American Journal of Clinical Nutrition linked to better appetite control and weight management (Leidy 2015 (external link)).

How people typically use it

  1. Set your own targets. You can set daily targets for protein, fiber, and individual micronutrients. Base them on what you've discussed with your prescriber or dietitian (see our discussion guide on talking to a dietitian or trainer), not the app's generic defaults.
  2. Log meals as you go. Like most food trackers, you can add entries by search, barcode scan, or saved recipes and meals. Saved meals help you build a repeatable routine around the smaller number of meals you may be eating when your appetite is low.
  3. Check the micronutrient breakdown. This is where Cronometer differs most from other trackers. One dashboard shows where you stand on vitamins and minerals such as vitamin D, B12, iron, magnesium, and potassium, which are easy to under-eat when your overall intake drops a lot.
  4. Look at trends over time. You can check whether a low-fiber stretch lines up with a bout of constipation, or whether low protein lines up with a period of low energy (see our guide on fatigue during titration). On the free plan, reports and charts cover a 7-day window; longer history needs Gold.

What it does for GLP-1 users

Most people can't feel a protein or fiber shortfall from day to day. Seeing the numbers is often the only way to notice the gap before it shows up as a symptom.

Precise protein tracking also supports body composition goals. Along with resistance training, protein is one of the two main inputs for body recomposition, as opposed to weight loss alone.

When you can only eat a small amount comfortably, knowing what that amount gives you helps you choose the foods that do the most for you. And a logged history of your intake is something concrete to go over with your prescriber or dietitian, instead of trying to remember how eating has been going.

A caution

Detailed nutrient tracking helps many people, but for others it can feed anxiety or rigid rules around food. Keep that in mind, especially if you have any history of disordered eating (see our guide on anxiety around eating or body image emerging during treatment). If tracking starts to feel compulsive, raise it with your provider instead of pushing through.

nutritiontrackingappproteinmicronutrients

Was this helpful?

Evidence: For & Against

Both sides of the topic, so you can weigh the evidence yourself.

3Supporting

Revision history

Last updated · 3 revisions recorded.

Show what changed
  1. v3

    Evidence sources 0 → 3

  2. v2

    Summary rewritten; Body revised

  3. v1

    Existing article recorded at the start of version history

Improve this page

Community notes

Share helpful experiences and questions. Notes are reviewed before publication and do not replace medical advice.

Loading notes…

    New submissions are currently paused. Existing approved notes remain available.

    Related terms

    • Leucine — An essential amino acid that is the main dietary trigger of muscle protein synthesis.

    Related guides

    • Protein quality: how to spot it on a nutrition label, and why it matters for muscle — A nutrition label counts every gram of protein the same, but your muscles don't. This guide shows how to judge protein quality from the label and ingredient list, compares popular picks side by side (Optimum Nutrition and Seeq protein powders, Oikos Pro, cottage cheese, David bars, Built Puffs, and protein "pop tarts"), and explains how to track intake when not all grams are equal.
    • Micronutrient gaps on a GLP-1: a labs-first guide — Eating much less on a GLP-1 means taking in less iron, B12, vitamin D, calcium, folate, zinc and more, and many people start with gaps already. The evidence says the risk is real but mostly quiet, and the right response is to measure before you medicate. Here's which labs to ask about, who needs them most, the one rare deficiency that is an emergency, and how to fill gaps with food first and supplements second, without megadosing.
    • Collagen peptides on a GLP-1: what the types actually mean, and which promises hold up — Collagen is the supplement most heavily marketed to GLP-1 users, and the type numbers on the tub mean less than the label implies. Here's what Type I, II, and III are, what survives digestion, how the evidence grades for the three big promises (skin, tendons, and joints), and the one collagen myth that can set back your results.
    • High-protein meals and snacks when your appetite is low on a GLP-1 — When a GLP-1 cuts your appetite, protein is the hardest target to hit and the most important one for protecting muscle. These are low-effort, low-volume ways to get 20–30g at a time when a full meal feels like too much, and how to prioritize when you can only eat a little.
    • "Your body can only use 30g of protein per meal": what the research actually says — The claim that your body "can only use 30g of protein per meal" is one of the stickiest myths in nutrition. It started from a real finding about the muscle-building rate and got stretched into a false claim about absorption. This guide covers where the number came from, what the evidence for and against it shows (including a 2023 study that fed young men 100g in one sitting), and why the myth matters even more when a GLP-1 has cut your appetite.