Weekly evidence review
A short read on which patterns held up, which weakened, and what deserves a closer look.
Your body is generating hypotheses. Earn the causation.
I/O finds patterns in sleep, doses, mood, training, and context. Use those patterns to run better N-of-1 experiments. Your core data stays on your device.
Android today. iOS soon. Free core, no account needed.
A personal data lab, not another dashboard
Bring your own signals
Health stores, wearables, training, nutrition, weather, and CSV imports in one local timeline.
Evidence you can inspect
Every pattern includes support, confidence, lift, and corrected significance.
Test the useful ones
Turn a pattern into a randomized N-of-1 experiment with a readable result.
Local by default
No analytics or telemetry. The core works without an account and your raw export stays local.
How it works
1
Connect & log
Connect the sources you use, then fill gaps with quick manual or voice logs.
2
Mine on-device
After enough consistent logs, I/O surfaces associations and shows the evidence behind each one.
3
Read the graph
The graph is a starting point. Open a pattern to see the data, statistics, and caveats.
4
Run the trial
Choose one change, follow a randomized schedule, and review the result without overclaiming it.
Built to make uncertainty visible
I/O keeps the calculation close to the data: deterministic mining, visible statistics, and experiments you can explain to yourself later.
Mining that shows its work
Every rule carries support, confidence, lift, raw p, and BH-corrected q. The Transparency screen documents exactly what the last run considered and what survived.
Lagged physiology
Inputs and outcomes rarely happen at the same time. I/O considers timing instead of only same-day averages.
N-of-1 trials, real statistics
Block-randomized A/B crossovers with Hedges' g small-sample correction, Hedges–Olkin CIs, seeded permutation tests, interim looks, and per-arm adherence tracking.
Voice logging that learns
Log a dose or a feeling in plain language, then confirm what I/O heard.
Mood in words, not scales
Words like focused, restless, or drained are often more useful than a single generic number.
Search everything
Find a period, an input, or a pattern without hunting through separate apps.
Grounded in the literature
See which mined concepts overlap with the bundled literature corpus, even offline.
21
Data Connectors
2,077
Bundled Literature Papers
5,000
Permutation Iterations
680
Automated Tests
0
Analytics. Telemetry. Crash Reports.
See it in action
The core data lab, followed by the Premium analyst and protocol review.
Your data stays yours
Mining, statistics, and voice parsing run entirely on this device. No analytics, no crash reporting, no telemetry. Your event history lives in a local database you can export — plain or AES-256 encrypted — or delete outright, any time.
Optional Premium features — server-verified subscriptions, cloud connectors, and the research analyst — use our minimal backend and only receive the data needed for that request.
Account-free core
No analytics
No telemetry
On-device mining
Encrypted export
Stop guessing. Start testing.
I/O is free to download and use — the core loop (logging, mining, graph, trials) is on-device and account-free. Premium adds the research analyst, experiment guidance, weekly reviews, and shareable reports.
I/O is a self-tracking tool, not a medical device. Patterns it mines are hypotheses, not diagnoses. Consult a healthcare professional for medical advice, diagnosis, or treatment.