Grzegorz Oksiuta

I didn’t set out to build a sleep app. I set out to get some sleep.

Our first child slept beautifully for about four months. Then, almost overnight, she didn’t. Naps that used to take twenty minutes turned into hour-long negotiations. Nights that used to be one wake-up became five. My wife and I did what every exhausted parent does: we started reading. Books, forums, blog posts, whatever was open at 3 a.m.

The advice was confident and it contradicted itself constantly. One book gave us a clock schedule down to the minute. Another said clock schedules were the problem. Everything assumed an average baby, and ours had clearly not read any of it. What almost nobody explained was the thing that actually turned out to matter: how long our specific daughter could comfortably stay awake before the next sleep, and how that number kept moving as she grew.

So I started writing it down. A spreadsheet, then a bigger spreadsheet. Wake times, nap lengths, how long it took her to fall asleep, how the evening went. After a few weeks the pattern was obvious in a way no book had ever made it. Her good days and her terrible days were separated by about twenty minutes of wake window. We weren’t dealing with a mystery. We were dealing with data nobody had bothered to show us.

Then our second was born, the 4-month regression came around again, and I realized I was rebuilding the same spreadsheet from scratch. At 3 a.m., one-handed, on a phone. That’s when Pelio started. I wanted the thing I had needed twice: something that watches the patterns for you and tells you what it sees, in a sentence, without making you dig through charts while you’re holding a baby.

How I write about sleep here

I am not a pediatrician. I am not a certified sleep consultant either. I’m a parent who got obsessive about one problem and then spent years building software around it.

So the guidance on this blog is anchored to published pediatric sleep research, primarily the American Academy of Pediatrics and the American Academy of Sleep Medicine, rather than to my own opinions. The ranges we cite come from those sources. Where the evidence is genuinely thin, or where the honest answer is “it depends on your baby,” I’d rather say that than invent a rule. None of it replaces your pediatrician, especially where feeding, growth, or medical concerns are involved.

If something here is wrong, unclear, or out of date, I genuinely want to know: [email protected].