The hard part isn’t logging

When people call calorie counting tedious, they usually mean one specific moment: standing over a plate of something mixed and homemade, trying to guess what’s in it. How much oil went into the pan. Whether that’s 250 or 400 grams of stew. Whether the rice was cooked in water or butter.

Packaged food skips all of it. The label declares calories and macros per 100 g, the net weight is printed on the pack, and the barcode identifies the exact product. Logging it isn’t estimation — it’s arithmetic. Half of a 400 g tub of cottage cheese is 200 g at exactly the label’s values. Done.

That’s why packaged food is easy mode. Not better food — easier counting. The difference matters, and this post is about using it on purpose.

What a barcode gives you

Three things a home-cooked plate never has:

Identity. The scan resolves to one specific product, not “granola, probably”.
Declared per-100 g values, printed by the manufacturer instead of guessed by you.
A known weight. The wrapper says 90 g, so the whole bar is 90 g. No kitchen scale needed for single-serve items.

In Calsheet the flow is: open the add screen, tap Scan barcode, point the camera at the pack. The product comes back from Open Food Facts with its nutrition filled in; you enter the grams you ate and save. For a single-serve item the whole thing takes about ten seconds. The barcode recognition happens on your device, and the lookup goes out with nothing attached — no account, no diary data. The barcode is the only thing that leaves.

One more reason to lean on it: it’s free here. As of 2026, MyFitnessPal keeps barcode scanning behind its Premium subscription. Calsheet doesn’t paywall it because there’s nothing to paywall — the data source, Open Food Facts, is an open database.

Where easy mode lies to you

Three failure modes worth knowing before you trust the numbers.

Open Food Facts is community data. Popular products are usually accurate; long-tail and local products can be half-filled or wrong. Calsheet shows an “Incomplete” badge when a record is missing pieces, and says so plainly when there’s no nutrition data at all. When that happens, spend sixty seconds creating the food manually from the physical label. You do it once — it lands in your personal food library and logs in two taps forever after.

Labels are allowed to be off. EU labelling guidance tolerates deviations of roughly ±20% for most nutrients, and other jurisdictions are similar. Your 250 kcal snack might really be 210 or 290. That sounds bad, but the errors point in both directions and wash out over a week — unlike eyeballed home cooking, which errs low almost every time. Oil is invisible; nobody over-guesses a salad.

Serving-size games. Some packs headline a “per serving” number built on an optimistic serving. Log in grams, not servings, and this whole class of problem disappears.

This is not a recommendation to eat from packages

Nothing above says packaged food is healthier. It mostly isn’t. The point is narrower: while you’re learning to track, packaged and weighable food gives your diary a backbone of numbers that are actually true.

The first weeks of tracking are a calibration period. You’re training your eye — what 30 g of protein looks like, what 400 kcal of pasta looks like, how much a “normal” portion actually weighs. If everything in the diary during those weeks is a guess, you’re calibrating against noise.

And “weighable” extends easy mode to fresh food. Chicken breast, rice, and apples have no barcode, but a cheap kitchen scale plus your food library gives them the same certainty.

A two-week plan

Weeks one and two, prefer food you can scan or weigh. Not forever — just while the habit forms and your eye calibrates.
Create your regulars once. The 5–10 products you actually eat every week, saved with real label values. After that, most days are logged from the library in a few taps.
Then start estimating. Restaurant plates, dinner at a friend’s, unlabeled food — a calibrated eye handles them fine, and a rough entry beats a skipped day. That transition is its own topic: how to keep tracking when you don’t know what’s in the plate.

Easy mode isn’t cheating. It’s where you learn the game.