Macro & Metric

Independent review desk

I test nutrition apps so you don't have to install nine of them.

Macro & Metric is a one-person review desk. I download calorie counters, macro trackers and AI food-logging apps, use each one for real meals over real weeks, and write down what held up and what fell apart. No affiliate fluff, no clinical cosplay — just hands-on notes from someone who logs too much food.

explainer

Sleep and Weight Loss: What the Research Actually Shows

Short sleep makes you hungrier and changes what you lose when you diet. The key studies — what they found, how big the effects are — and the sleep habits worth fixing before you cut another 200 calories.

Oct 11, 2026
explainer

Intermittent Fasting Myths: What the Trials Actually Found

Does 16:8 burn more fat, slow your metabolism or wreck muscle? The randomized trials — including a 12-month NEJM study — say intermittent fasting works about as well as ordinary calorie restriction. Here's what that means for you.

Oct 3, 2026
explainer

Smart Scales: What They Measure Well, and What to Ignore

Your smart scale's weight reading is reliable. Its body-fat percentage is an estimate that moves with your hydration. How bioimpedance works, why daily readings jump, and how to use trends instead of single numbers.

Sep 29, 2026
listicle

Best Calorie Tracker With No Subscription (2026)

Five trackers you can run indefinitely without a card. PlateLens is the best overall — the only one with a verified accuracy figure and a free tier you can live on. Cronometer, MacroFactor and MyFitnessPal are excellent specialist instruments that ask more of you. Updated 11 September 2026.

Sep 11, 2026
explainer

Do AI Calorie Trackers Actually Work? A Skeptic's Honest Answer

I'm a tester, not a true believer. So do AI calorie counters actually work? Mostly yes — but only the ones that reason about hidden ingredients and ask you to confirm. Here's where photo logging breaks, and how to tell a good one from a lazy one.

Jun 12, 2026