Regarding correlations I agree, I have a disclaimer that correlation is not causation in the About page / README. But it's still interesting to see correlations and you can make further investigations into whether there is a causal relation or it's a coincidence.

The Correlate feature is what made it click for me. I found that my chemo side-effects peaked at an 8-day lag — not when the doctors said they would. I showed the chart to my oncologist and it changed the conversation from "I think the side-effects come later than you warned" to "here's the data."

Recently my CT scan showed all tumors shrinking for the first time. Digging into the data, the clearest signal is a sharp increase in daily steps over the past month — partly better weather, partly a new puppy who needed walking. Steps are a known predictor of cancer survival, and the correlation-with-lag tool made it easy to see the timing line up with my scan window.

There's also a premium AI Analyst tab (powered by Claude) that answers natural-language questions about your data and generates daily insight cards. It's how I pay the bills while I'm not working and fighting cancer — the core tracking and analytics are free.

The app is general-purpose. I use it for cancer, but it works for anything — habits, grades, mood, workouts, macro data. I wrote a separate post using it to find the 12-18 month lag between Fed rate changes and unemployment.

Free on iOS: https://apps.apple.com/us/app/meetrics/id6760925743 Full write-up with screenshots: https://github.com/sergeybok/meetrics-support/blob/main/BLOG... Would love feedback from the QS/data crowd here.

Comments URL: https://news.ycombinator.com/item?id=47634378

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However there is not enough data yet from the cancer to write an interesting blog post (I plan on writing one on how I use it for cancer in a month or so once I have more data). That's why I wrote this economics blog post with the help of Claude. It walks you through how to use the app and it's actually quite interesting if you're interested in macro-econ like me. The app is targeted for people who like data, dashboards, and metrics; and who want to have an easy way to run experiments on their own personal data (e.g. Thompson sampling is implemented for binary data).

There is also a premium subscription where you get an AI Analyst (powered by Claude) that has access to your (anonymized) data. But the app is very useful without the Analyst too, especially if you are into playing around and exploring data.

Comments URL: https://news.ycombinator.com/item?id=47566160

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