How it decides the hours

The idea is that the system regulates itself and that nobody has to tune anything. Underneath there are eight rules and a table; the numbers on this page are read from the model itself, so it cannot fall behind what the app actually does.

  1. 01

    Where it starts from

    Age gives a reference wake window: how long they stay awake between sleeps. It is the only thing there is on day one, and it is at the end of this page.

  2. 02

    What it learns

    Every time a sleep of at least 20 minutes follows an awake stretch, that window counts as evidence. Five-minute catnaps do not count: they say nothing about how long they last and they would only muddy the average. A nap that stops at a single cycle —under 45 minutes— teaches nothing about the window before it either: it says it was cut where naps get cut.

  3. 03

    How it blends them

    The reference for their age weighs as much as 3 observations, so within a few days it is your baby in charge and not the table. Recent counts for more: the average is exponential with a half-life of 5 days. Anything older than 21 days is dropped, and so is anything far outside the reference — a day in hospital, a button nobody tapped. At around 8 useful windows the confidence is full, and the app says at every moment how much of the forecast is theirs by now.

  4. 04

    The shape of the day

    A window is not worth the same in the morning as it is before bed: the first is shorter and the last is longer. Observations are normalised by their slot before being averaged, and the prediction applies the factor for the slot in question again. And after a short nap the next window shortens, but not by half: sleeping half as long does not leave a baby with half the wind in them, it leaves them with a little less.

  5. 05

    How many naps

    The other number the table only gets right at the beginning. It is learned the same way as the window but more slowly —half the weight every 7 days, forgotten after 28— and counting only days that are closed and have something recorded: a blank day almost never means they did not sleep, it means nobody tapped the button. Unless the last 3 closed days all agree on another count: a run like that is not an odd day, it is the new rhythm, and it is adopted without waiting for the mean to admit it. And the evening is measured against what they have lasted before bed lately, not only against the window: an extra nap only goes in when the stretch to the night is longer than what they have already done.

  6. 06

    The night

    It is not a window, it is the household's hour: it is anchored to the clock —the median of the last 7 nights— and it does not drag when a nap runs long. And how long it lasts is measured with the median of the last 5, not the mean: where the four o'clock waking sometimes gets recorded as two sleeps, half a dozen split nights drag a mean and do not move a median.

  7. 07

    The whole day, not just the next one

    The same sum repeated until the night: nap, window, nap, and when the day's naps run out, bed. It comes from the server and not from the browser, because two ways of working out the same hour end up saying different things on the same screen. And only what is left gets projected: what has already been slept is recorded and is shown exactly as it happened.

  8. 08

    The days that have not arrived

    The same sum over an empty day. As there is no last waking to start from, it starts from the time they usually get up, and never before 5 in the morning, which is where this model cuts one day off from the next. Every hour carries its margin, added in quadrature, because the morning moves and every window adds its own. 14 days is the limit: beyond that this repeats the same pattern, and offering it would be faking a precision that is not there.

The table by age

The starting point, and nothing more. As soon as there are sleeps recorded, what actually happens counts for more than this.

Up toAwakeNapsNight
1 months50 min58 h
2 months65 min49 h
3 months80 min410 h
4 months95 min310 h
5 months110 min310 h
6 months125 min311 h
8 months150 min311 h
10 months170 min211 h
12 months195 min211 h
15 months225 min211 h
18 months255 min111 h
24 months285 min111 h
36 months315 min111 h
beyond that330 min111 h

What appears, and when

A newborn and a one-year-old do not need the same app, so napnap does not show the same thing to both. This is the whole list: nothing is hidden behind any other condition.

  • From day oneThe button, the feeds and whatever gets recorded. There is no rhythm to find yet, so napnap suggests no times and sends no alerts to the phone — unless this house has already taught it enough not to be guessing.
  • From 2 monthsA shape begins to appear. The day's forecast and the alerts are worth having by now, always with their margin in front of them.
  • From 5 monthsSolids appear, a month before the first spoonful, which is when it gets prepared. It can be brought forward in settings; the plan itself never starts before four months.
  • From 6 monthsThe plan under way: a new food every two or three days, iron from the second week and every allergen with its own wait.
  • From 10 monthsLumps, pieces and three meals. This is the stretch with a date on it: past ten months, carrying on with everything blended gets flagged once.
  • From 12 monthsThey eat what the household eats and the naps are heading for one. Weight gets looked at every few months, not every month.
  • From 24 monthsOne nap or none. From here on napnap is mostly a history and a report to take to the check-up.

And the food

Solids appear from 5 months onwards. 3 new foods go in each week, one every two or three days, with at most 2 major allergens so that a reaction has an owner. From the second week there is a source of iron every week. It takes 5 refusals with no acceptance at all to say something is not to their taste, and by 10 months the window for textures has closed.

There is no medical advice here. The order and the waits come from what has been published (WHO, AEP, AEPap, ESPGHAN, AECOSAN) and the decisions are yours, with your doctor.

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