Nestling
Smart, AI-enabled baby sleep tracker and personalised coach
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Kev P

Nestling - Intelligent Baby Tracker - Track your baby from your terminal, watch, or AI agent.

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Nestling is the first baby tracker with a public API and MCP server. Connect your baby's data to Claude, ChatGPT, or your own scripts. Log feeds from your terminal. Query sleep history in natural language. It's the only tracker with free Apple Watch, live lock screen timers, Siri, and Alexa support. AI coach analyses your baby's actual patterns to predict nap windows and generate personalised sleep plans. Built by a parent and paediatrician. Works offline. No trackers. No data selling or ads.

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Kev P
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Hi all!

I'm a paediatrician, app developer, and dad to a now 17-month-old.

When my son was born, we tried the popular baby tracking apps and gave up quickly. They felt designed to maximise engagement with frequent notifications, gamified logging and marketing emails.

So we went back to a paper diary, but in a busy household paper gets lost. And when sleep regressions hit, I found myself pasting handwritten notes into Claude asking "please HELP?!". I thought it would be helpful if the AI already had the data in a structured way and it was easy to visualise. Thus Nestling was inspired.

What makes Nestling different:

  • The AI coach isn't a generic chatbot – it has context. Your baby's actual sleep patterns, feed times, age. So when you ask "why won't she nap?" at 3am, you get advice based on your baby.

  • The rest of the app is deliberately minimal. No pressure, no guilt, no notifications, no marketing.

  • The tracker is completely free.

  • It includes support for Apple Watch, Siri and other apps' "premium" features like dark mode, custom themes, lock screen timers and nap predictions for free.

  • The AI coach is premium because API calls cost real money and I refuse to do ads or sell data.

  • But I added open-source support for MCP and CLI so you can get the benefits from your own AI agent, be it Claude, ChatGPT, OpenClaw or others.

I would love feedback from other parents and users. What would make this more useful? What's missing? I built this to help, and I want to get it right.