An observation
Last night you slept five hours.
Today at 3pm, you'll reach for something sweet. Not because you're craving it —
because your leptin is low and your prefrontal cortex is running at half power.
Your phone knows both things. It has never told you.
The question
Samsung Health tracks your sleep. Apple Health collects your steps. MyFitnessPal counts your calories. Omron sends your blood pressure. Galaxy Watch follows your heart.
Each has its own pretty chart. Each sends its own notifications. Each asks for your attention separately.
None of them tells you what they all mean together.
A pattern
Over the last 3 weeks, on days that followed nights under 6 hours, you ate on average 280 kcal more than on other days.
The difference was concentrated in simple carbs, between 2pm and 5pm.
That's what Otto does.
It doesn't tally. It doesn't congratulate you. It doesn't give you a streak.
It reads the data already on your phone and tells you when those signals are influencing each other.
How Otto works
Otto reads sleep, movement, heart rate, blood pressure and weight automatically — from Apple Health or Health Connect.
Food you log inside Otto, through NutriBase — our nutritional database. Scan a barcode, scan a label, or search manually.
Then Otto does two things:
It searches your data mathematically for patterns.
Sleep, meals, movement, salt, protein, carbs, heart rate. Correlations, lags, deviations.
It compares them to what science has documented.
Peer-reviewed studies on leptin, HRV, hydration, sodium, recovery.
When the two meet, it tells you what is happening and why.
No AI. No guessing. Math and cited studies.
Position
Otto won't tell you to "crush it today".
Otto won't congratulate you for drinking water.
Otto won't send panicked notifications if you skipped a day.
Otto observes. That's it.
The rest — what you do with the information — stays with you.
Because Otto thinks you are an adult.
The evidence
They are documented. Peer-reviewed studies, published in scientific journals. Otto is built to observe what science has already shown.
After a 5.5-hour night, subjects ate on average 300 kcal more the following day — mostly simple carbohydrates.
Markwald et al. (2013) — PNAS
Restricting sleep to 4 hours for a single night increased activity in brain regions associated with hedonic food cravings.
St-Onge et al. (2012) — AJCN
Mild dehydration (1.8% of body mass) decreased cognitive performance, attention and working memory in young adults.
Adan (2012) — Nutrition Reviews
Heart-rate variability (HRV) accurately predicts perceived stress and recovery quality — independent of self-reported sleep hours.
Kim et al. (2018) — Psychiatry Investigation
Consistent self-weighing, without rigid targets, doubles the probability of long-term maintenance — compared to sporadic monitoring.
Burke et al. (2011) — JADA
Coming soon
On Android it reads from Health Connect — Samsung, Huawei, Xiaomi, Fitbit, Garmin, Omron, and any compatible smart scale or wearable. On iPhone it reads directly from Apple Health, including data from Apple Watch.
It watches for patterns across sleep, food, movement, weight, blood pressure, heart rate and hydration. It writes a calm weekly report on Sunday evening. No streaks, no anxiety, no motivational coaching.
Food you log through NutriBase, our own nutritional database — scan a barcode, scan a label, or search manually. A few seconds per meal.
Two screens from the current build. The rest of the app — the same: calm, readable, no streaks.
The invitation
Launching soon.
1–2 emails before launch. No spam, no sharing, no marketing tracking.
Frequently asked
On our servers, in the EU. Encrypted. We don't sell it, share it, or use it for ads. Ever.
The insights, no. Otto uses math and peer-reviewed studies to find and explain patterns — nothing generated, nothing guessed. Scanning nutrition labels uses optical character recognition to read values from the packaging.
Inside Otto, through NutriBase — our nutritional database. Scan the barcode, scan the nutrition label, or search manually. A few seconds per meal.
Otto does not read food data from other apps. Everything nutrition-related goes through NutriBase. The rest (sleep, steps, heart rate, blood pressure, weight) comes in automatically from Apple Health or Health Connect.
iPhone (iOS 16+) via Apple Health. Android (10+) via Health Connect. Compatible with Samsung, Huawei, Xiaomi, Fitbit, Garmin, Omron, Apple Watch, Galaxy Watch and most modern wearables.
The first 500 sign-ups lock in €29.99/year forever. The next 1,500 lock in €39.99/year forever. After that, the price returns to standard.
Two. One around mid-May, one on 31 May. That's it. No spam, no sharing, no tracking.
