A new diary can count more cleverly than the old one and still leave you at the same daily data entry.
MacroFactor makes a permanent diary as smart as a permanent diary can be. It matches logged food against your weight trend, estimates your real energy expenditure and updates the target every week.1 That is honest, well-built machinery — and it works for as long as you keep entering food.
Calk answers the same question differently: take it apart, then stop. A month of ordinary eating, your usual diet examined, a change to what is worth changing — and the diary closes. After that, new weigh-ins keep the trend current, and food entries are not needed for it.
Food and weight update the expenditure estimate; the estimate updates the target. The cycle is built to repeat.
The check gives you your diet taken apart and changes inside the meals you already eat. After that — a weight trend that builds itself.
The simple test: what is left when you stop entering food#
Sooner or later you will stop. Not from weak discipline, but because entering food is work, and over time there is less and less new information in it.
Without new entries MacroFactor keeps your history but stops updating the expenditure estimate and the recommendations: there is nothing to update them from. Continuous calculation needs nutrition on at least four days out of seven.1
In Calk, stopping is not a loss:
Weight is read from Apple Health or Health Connect, or entered by hand. The chart builds itself and asks for nothing in return.
A week of ordinary entries, and the fourteen groups show what dropped out of your diet along with the season. A week, not a way of life.
The weekly variety screen is built from your entries, so it does not run on its own: you come back to it for a week, when the season or the routine has changed.
Your saved meal templates do not go anywhere either. If a new check is needed six months from now, a familiar dinner opens ready-made instead of being assembled again.
No streaks, no reminders#
This is a deliberate product decision, and it is the first thing you notice when switching. Calk has no running streak, no “red days”, no missed-day counter and no notifications suggesting you close the day. A missed day means less data — that is all.
The only food-related notification appears in a different situation: if the weight trend has drifted seriously and persistently, Calk will once, quietly, suggest a short food check. Not every morning, not after a particularly heavy day, and not on a schedule.
How to read the trend itself, and why one morning means nothing, is in why weight changes every day.
One bowl in two systems#
Picture a bowl with rice, chicken, vegetables, sauce and oil.
- Find or create each component.
- Enter the grams.
- Save the meal.
- Tomorrow, repeat for whatever changed.
- Open the bowl template.
- Mark the protein, base, sauce, oil and portion.
- Log it.
- Tomorrow, change chicken to salmon and nothing else.
The first path is what you need when every gram matters to a training plan. The second is built for someone who is not going to pull out a scale in a café: the estimate is approximate, but it took half a minute and it repeats for a month straight. For the conclusion “protein rests on chicken alone, and legumes never appear”, that is enough — a pattern that size is larger than the error in estimating a portion.
How many taps an entry takes#
MacroFactor publishes its own logging speed index, the FLSI. It counts how many steps four ways of logging take: database search, repeating something logged before, the barcode scanner and quick-adding calories. Photo and AI recognition were not part of the 2025 measurement.2
Calk counts its own numbers against typical diets from 13 countries: the USA, Canada, the UK, Germany, France, Spain, Poland, Czechia, Russia, Israel, the UAE, Mexico and Brazil. The run of August 15, 2026 gave:
An ordinary entry averages 3.63 taps. There was no stopwatch here: counting a tap at one to two seconds and adding the typing of the name gives six to ten seconds, but that is a calculation from taps, not a measurement of time. Repeating a saved meal needs no typing at all: the card is already the way you left it.
How many taps it takes depends on how many required choices the card has. Coffee has none — three taps. Tea names its variety — four. Rice carries two choices and “tartine with butter and jam” three, which is where five and six come from. Dishes that no single card can describe are counted separately: a cheese board is an enumeration, and in the measurement it costs five taps.
This does not compare directly to the FLSI: the scenarios differ, the two methods count different things, and two such numbers do not subtract from one another. Our corpus is written meal scenarios replayed against the code of the shipping app, not telemetry — nobody’s diary was read. How the whole measurement works — in how many taps logging takes.3
Maintenance: a target or a range#
In MacroFactor, maintenance is a mode that holds the target trend within roughly ±0.7 kg and keeps updating the calorie target from your entries.4 It works while the entries exist.
In Calk, maintenance needs no food logging at all. You choose the trend range you consider normal for yourself, and then you simply weigh yourself. The app does not assign you the boundaries and does not turn them into a daily alarm; going outside them is a reason to look at your food once, not to restrict it immediately. More on this in how to maintain weight without daily tracking.
Contest prep, a bulk and a managed deficit are not this case. MacroFactor gives you more control there.
Price#
As of August 11, 2026 MacroFactor has no permanent free tier: after a seven-day trial, the base US website prices were $11.99 a month or $71.99 a year.5
Calk keeps food logging, daily totals, weight entry and the trend chart free. A new account opens with 30 days of full access and no card; after that a subscription is needed for the Nutrition Report.
Choose a duration, not a feature list#
MacroFactor — if you want to keep a diary going and want it to get smarter.
Calk — if the goal is to understand your ordinary eating, change what is worth changing in it, and get out of daily logging while automatic monitoring stays.
Take the one meal you eat most often, build it in Calk and log ordinary days for a month. The report will show what your diet actually rests on. After that the diary can close — that is the plan, not a relapse.
Calk is available on iPhone, iPad, and Android.
Frequently asked questions#
How often does MacroFactor ask you to log food?
What happens in Calk when I stop logging food?
Which app is better for building muscle and hitting exact macros?
Does Calk send reminders to log food?
Sources and review date#
MacroFactor’s features, logging-frequency requirements and prices were checked on August 11, 2026 against the company’s official materials.
The expenditure algorithm and how frequently you need to log. ↩︎ ↩︎
Food Logging Speed Index, 2025 update: 21 apps, four scenarios, scored in actions. ↩︎
Run of August 15, 2026, app version 1.0.7. The corpus is 13,561 dishes across 5,189 meals in 13 countries, 1,578 of them different by name. The shares and the average are measured over 13,543 dishes: only 18 stay outside the denominator, the ones naming food the catalog does not have. Dishes that no single card describes, and dishes with more than one reading, are counted under declared rules instead of being left out; for the latter, the average at the cheapest reading is published next to the average at the dearest — 3.63 against 3.68. Repeating a saved meal takes two taps from the food screen and three from a cold start. The seconds are taps at one to two seconds each plus typing the name, not a stopwatch reading; someone deciding whether that was one bowl or two takes longer, and no model here measures thinking. ↩︎
MacroFactor subscriptions, US website prices on August 11, 2026. ↩︎