Last reviewed: 7 May 2026
Scan a UK barcode, hit log, and we add the carbs, protein and fat from the nutrition panel to your day in real time.
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Quick answer: A macro tracker logs the three energy-providing nutrients in your food — carbohydrates, protein and fat — and adds them up across the day. We read the numbers straight from the UK nutrition panel on whatever you scan or search, so the totals match the labels you actually buy. Free to log up to 25 foods/day. NutraSafe Pro is £3.99/month (iOS, monthly only) and unlocks vitamin and mineral tracking against UK NRVs, AI Coach, AI meal scan, allergen warning detail, fasting, workouts, suspected-triggers analysis, and processed-food and NRV insights.
Carbs, protein and fat are the three nutrients your body burns for energy — measured in grams, and as a share of your daily calories.
In plain English, your body gets calories from three places: carbohydrates, protein, and fat. Each gram of protein and carbohydrate gives you about 4 calories; each gram of fat gives you about 9. A macro tracker takes the gram counts off a food label and tells you, by the end of the day, how those numbers added up — and what share of your total energy came from each.
Most people never need to memorise the formula. What they want to know is: did I get enough protein today? Did I overshoot on carbs at lunch? Is my saturated fat creeping up week on week? That is what we are showing you, in numbers that come straight from the back of every UK pack you scan.
We will not tell you what your macro split should be. There is no single right answer for everyone — and we are a tracker, not a dietitian. What we do is give you a clear picture, day by day, week by week, that you can act on yourself or take to your GP.
Builds and repairs tissue. Roughly 4 calories per gram. We track grams per meal and your running daily total against whatever target you set.
Your main energy source. Roughly 4 calories per gram. We split out total carbs, sugars and fibre — three numbers most other trackers blur into one.
Energy-dense at 9 calories per gram. We show total fat alongside saturated fat — the figure that actually appears on every UK label.
Whichever you choose, the numbers come straight from the UK nutrition panel.
1. Scan a UK barcode. The fastest path. We read any UK GTIN/EAN — the same barcode format used across every UK supermarket and corner shop — and look up the product in our food database. The card you see shows ingredients, additives we found, and the carbs, protein and fat per portion as printed on the back of the pack. Hit log, pick your portion, and your daily totals update.
2. Search by name. Useful for unbranded items — apples, an egg, a banana, a slice of bread you cut yourself. Type the food, pick a portion, hit add. We pull macros from the same UK nutrition data we use for packaged products.
3. Photograph the plate. A NutraSafe Pro feature. For meal-deal sandwiches, a curry from the local takeaway, or a roast at someone else's house, our AI meal scan estimates calories and macros from a photo. Less precise than a barcode scan, more honest than guessing.
Carbs, protein and fat in grams for every entry, with rolling daily and weekly totals.
The figure on every UK label, on every food in your diary — not buried inside total fat.
Total carbs, sugars and fibre on three separate lines so you can see what is actually in there.
Set your own grams-per-day for carbs, protein and fat. We track against whatever you choose.
We read the standard UK GTIN/EAN — same format used in every UK supermarket and corner shop.
On NutraSafe Pro, we go past macros and track 25+ vitamins and minerals against UK Nutrient Reference Values.
Most macro trackers stop at carbs, protein and fat. We do not, because macros do not show micronutrient gaps. You can hit your protein target, stay inside your carb count, and still spend the week short on iron, folate or vitamin D — and you would never know from looking at a macro pie chart.
The UK National Diet and Nutrition Survey 2019 to 2023 (gov.uk, June 2025) found 18% of UK adults aged 19 to 64 had low vitamin D status, and 83% of women of childbearing age had red-cell folate below the threshold associated with reduced neural-tube-defect risk. These are population-level findings from the official UK government survey, not a guess. Most people only learn about gaps like this from a blood test, after the fact.
On NutraSafe Pro, we run every food you log through our micronutrient engine and add the vitamins and minerals to your week. By Sunday you can look back and see, for example, that you hit the folate NRV on two days out of seven and missed it on five. That is not medical advice, and we are not going to tell you to take a supplement — but it is the kind of fact you can take to your GP or dietitian and have a real conversation about.
We compare against UK NRVs (Nutrient Reference Values), not US RDAs. Those are the same numbers you see on the back of every UK pack — so a label that says "30% NRV vitamin C" lines up with the figure on your dashboard.
We are honest about the line. Our app is free to download, but the full feature set is paid. Here is the split, taken straight from the code.
We do not run an annual plan and we do not run free trials with hidden charges. It is £3.99 a month, monthly, on iOS, and you can cancel from the App Store at any time.
Here is what an honest week of macro logging looks like in our app.
Monday morning. You scan the barcode on your usual oat-milk porridge. Carbs, protein and fat update on the dashboard along with fibre. You add a banana from the search index and a coffee with milk. Twenty seconds, three foods.
Lunch. Meal-deal sandwich, packet of crisps, fizzy drink. The sandwich and crisps are scanned in two seconds each — both have UK barcodes and full nutrition panels. The drink is searched by name. Total time to log lunch: under a minute. The dashboard now shows you are about 65% of the way through your daily carbs.
Tuesday evening. Takeaway. No barcode, no obvious portion. On NutraSafe Pro you photograph the plate; our AI meal scan returns an estimate. Less precise than a label, but it gets logged — and a logged guess is better for your weekly picture than a missed entry.
Friday review. The dashboard shows your weekly macro split — what share of your calories came from carbs, protein and fat across the seven days. On Pro, you also see where you sit on each vitamin and mineral against UK NRVs, and a watchlist tells you which ones you have missed two or more days in a row. That is the moment most users notice the pattern they did not know they had — usually low fibre, low folate, or low vitamin D.
No grades, no green tick, no "you have eaten badly today" verdict. Just numbers, your numbers, against UK reference values.
Log meals, scan UK barcodes, and see your carbs, protein and fat add up against UK nutrition data — with vitamins and minerals against UK NRVs on Pro.
Free to log up to 25 foods/day. NutraSafe Pro (£3.99/month, iOS, monthly only) unlocks vitamin and mineral tracking against UK NRVs, AI Coach, AI meal scan, allergen warning detail, fasting, workouts, suspected-triggers analysis, and processed-food and NRV insights.
Free to download · NutraSafe Pro £3.99/month · iOS