Diets · Calorie Deficit
The one thing a calorie deficit needs is a record you'll actually keep
Nobody needs convincing that a deficit works. The problem is that measuring it requires estimating both sides of a subtraction, both estimates are wrong, and the effort of producing them is what makes people quit inside a month. The way out isn't a better database — it's to stop treating the daily total as the measurement and start treating your own weight trend, read across weeks against a record of what you actually ate, as the evidence. It is less satisfying and considerably more accurate.
For anyone who understands the arithmetic and can't sustain the data entry.
What it actually is
Eating less energy than you use, which is the mechanism underneath every other approach on this page whether or not they say so. The arithmetic is sound. The measurement is the weak part: calorie labels carry real error, portion estimates carry more, and your expenditure is not the number on the machine. That's why the counting so often disagrees with the scale, and why a trend over weeks is better evidence about your own deficit than any daily total.
Why this is hard to keep track of
- Both sides of the subtraction are estimates, and the error is bigger than the deficit
- Logging every item is a daily tax, and it gets abandoned in week three
- Daily weight swings on water and reads as failure on a perfectly good week
- A plateau tells you nothing without a record of what changed before it
Worth recording
- What you ate, in a sentence. No totals to produce
- Weight often enough for a trend line, which is the actual measurement
- The meals you'd normally leave out, which are where the gap usually is
- Alcohol, weekends and eating out, which are the three biggest quiet variances
Cadence
A line per meal and a weigh-in when you feel like it
In practice
Say it once, or photograph it
The entries most worth having are the ones made at the exact moment nobody wants to fill in a form. A sentence — typed, dictated, or replaced entirely by a photo of the plate — is a much lower bar, and it carries the context a calorie field would have thrown away.
Called 4 tools
log_weight(kg: 91.4)get_trend(metric: "weight", window: "8w", smoothing: "weekly")compare_periods(metric: "eating_occasions", window: "3w")find_pattern(group_by: "day_of_week")
Every figure here was counted from entries you made. The model chose which tools to call — it doesn't score the meal, estimate calories from a photo, or decide what any of it says about you.
And then ask
The question the log can answer
Months of entries hold real answers to the things you've been guessing at, and reading them properly has always meant a spreadsheet and a free evening — which is exactly what nobody has.
Ask in plain language. The answers come back with the counts behind them, including when those counts are too thin to mean anything yet — which is the more useful answer far more often than people expect.
Called 3 tools
get_history(topic: "calorie-deficit", window: "6m")find_pattern(group_by: "context")compare_periods(metric: "entries")
Counts and averages over your own entries, nothing more. Where the data is confounded or too thin, the answer says so instead of rounding it into a conclusion.
What it does
Set up around calorie deficit
The same mechanics as everything else here, pointed at what actually matters for this one.
Log the protocol as you're living it
What you ate, in a sentence, plus whatever this particular protocol turns on — a window, a training day, a threshold. No spreadsheet to maintain.
The parts that drift
Windows stretch, thresholds creep, and the rule you're following in month three is rarely the one you started with. Drift is obvious in a record and invisible from inside it.
Whether it's actually doing anything
The question every protocol dodges. Answered here by comparing your own weeks against each other, rather than against a claim from a website.
Straight about the evidence
Where the research is strong we say so, and where a popular claim doesn't hold up we say that too. You can get the marketing version anywhere.
The weeks it slips are the useful ones
Adherence is what separates protocols that work from protocols that don't. The days it came apart, and what was happening on them, are the most informative entries in the whole log.
Something to review with someone
Several of these interact with medication. A real record of what you ate and how it went is what makes that a conversation rather than a guess.
The reason a lot of people start
Something to actually bring to the appointment
You get fifteen minutes, and the first question is always some version of "so what does a normal week look like?" — which nobody on earth can answer accurately from memory.
What this gives you: Evidence of what you actually ate over months, which is the only way anyone can help you work out where the arithmetic and the reality diverged.
- Export the date range you were asked about, as a file you can print
- Photos alongside the entries, which say more than any description
- Counts and timings rather than an impression of the worst week
- Nothing shared anywhere unless you choose to share it
What it won't do
- Score a meal, or sort food into good and bad
- Estimate calories from a photo and present the guess as a number
- Set you a calorie target, a macro target, or a weight
- Run a streak you can break, or tell you that you've fallen behind
- Comment on your body. The photos here are of food
- Diagnose anything, or suggest that a pattern is a diagnosis
It's a notebook that can do arithmetic and answer questions about itself. Deciding what any of it means is a job for you and the people advising you.
Early access
Start with what you're already trying to hold in your head
Tell us what you've been trying to keep track of and we'll set it up with you — recording the thing that's actually useful, at a cadence that survives a bad week.
- Founding accounts lock their price for life
- No card, no trial clock, no notification designed to make you feel behind
- Export everything you've logged, photos included, whenever you want
Also here
The rest of the picture
These overlap constantly, which is the point — the answer to a question about one of them is very often sitting in another one's data.
Intermittent Fasting
A line per meal, plus the window when it's not your usual
Mediterranean Diet
A sentence a meal, most days. Missing some is fine
High Protein
A sentence a meal. No weighing, no barcodes
Low Carb
A sentence a meal, plus a note on how the afternoon went
Keto
A sentence a meal, and a note on how the day felt
Plant-Based
A sentence a meal, most days
Macro Tracking
A sentence a meal. Nothing weighed, nothing looked up
Keep the record without it becoming another job
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