Diets · Intermittent Fasting
An intermittent fasting tracker that records what you ate, not just when
Every fasting app tracks the window, because a timer is easy to build. The window is also the part you already know — you were there. What determines whether this protocol is doing anything for you is what happens inside it: whether the first meal after a fast is enormous, whether the window quietly drifted from eight hours to eleven, whether the energy dip at hour fourteen is costing you the afternoon. None of that is on a timer, and all of it is in a sentence per meal.
For anyone running 16:8, 5:2 or something similar and wanting to know if it's working for them.
What it actually is
Intermittent fasting restricts when you eat rather than what. The common versions are 16:8 — all meals inside an eight-hour window — and 5:2, where two days a week are heavily reduced. The honest summary of the research is that it works for the people it suits, mostly because eating in a shorter window tends to mean eating somewhat less overall, and that head-to-head against plain calorie reduction it does not consistently come out ahead. Whether it suits you is a real question and it's answerable from your own log.
Why this is hard to keep track of
- Fasting apps track the timer, which is the part you already knew
- The window drifts by twenty minutes a week and nothing notices
- The first meal after a long fast is the one that decides the day, and it's unrecorded
- After a month there's no way to tell whether the protocol or the season changed things
Worth recording
- When the window opened and closed, roughly
- What the first meal after the fast actually was
- Energy and concentration through the fasting hours
- Whether the evening ran past the window, and what was happening when it did
Cadence
A line per meal, plus the window when it's not your usual
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_window(opened: "12:30", closed: "22:00", target_hours: 8)log_meal(items: ["curry", "rice"], first_after_fast: true)log_meal(items: ["toast"], at: "13:40")compare_periods(metric: "window_length", window: "8w")
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: "intermittent-fasting", 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 intermittent fasting
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: A record of what the protocol looks like in practice rather than on paper, which is what anyone reviewing it with you needs and what almost nobody has.
- 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.
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
Calorie Deficit
A line per meal and a weigh-in when you feel like it
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
Founding pricing is locked for accounts opened during early access.
Founding accounts lock their price for life. No card required.