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Method

Casting a wide net is easy. Not drowning in nonsense is the hard part.

Compare two thousand pairs of things and dozens will look meaningful by pure chance. Here is everything a relationship has to survive before Sesharo will say it out loud.

One night's filtering, in full.

2,412 pairs worth comparing
1,106
have at least fourteen days where both were recorded
784
survive detrending — slow drift removed, so we measure day to day
214
where two independent tests agree on the direction
9
survive correction for the fact that we tested 2,412 things
4
get shown to you

The rules we hold ourselves to.

Fourteen days, minimum

Below that, a link has to be enormous to mean anything, so we don't look. You get “not enough days yet” instead of a confident number built on eleven observations.

Two tests must agree

One test assumes a straight line; one doesn't. When they disagree, something odd is going on — an outlier, a curve — and we suppress rather than guess.

Corrected for how much we looked

Testing thousands of pairs guarantees false alarms. We adjust the bar to account for exactly how many comparisons were made — which is the step most apps skip.

Tested at every lag

Causes rarely land the same day. A big meal shows on the scale on day three; a flight raises your heart rate for two mornings. We look forward as well as at today.

Linked, never caused

A relationship is a relationship. Sesharo will not dress one up as a mechanism, and it tells you when something is suggestive rather than settled.

Direction is enforced

Everything carries a role — a thing you can change, a thing that happened to you, or a result. Your bad sleep will never be presented as the cause of your coffee.

Measured against you

“High” means high for you, against your own trailing history — and it knows a Saturday isn't a Tuesday, so weekends stop reading as anomalies.

Digging is separate from telling

Weak signals are visible when you go exploring, and drawn as weak. They never become a notification. Silence is a valid answer.

Effects arrive late.

Eat a huge dinner and the scale barely moves. Wait three days and there it is. Most apps only ever compare today with today, which is why they find nothing.

Drag to move the window.

big intake day → weight

Four sentences a night. Earned.

We would rather tell you nothing than tell you something that isn't true.

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