What self-experiments would you actually want to run?

Just launched Protocol — an app for running structured

self-experiments on yourself.

Not a habit tracker. The difference:

Habit tracker → did you show up today?

Protocol → did it actually change anything?

Here's how it works:

1. Pick an experiment (or build custom)

2. Capture your baseline metrics on Day 0

3. Log a 2-second daily check-in for 14–30 days

4. Get a verdict — keep it or drop it, backed by your data

What I've tested personally:

- Cold showers 14 days → Energy +42%, Mood +35% ✅ kept

- No sugar 21 days → Sleep +14%, Cravings -63% ✅ kept

Currently 15 built-in protocols: cold showers, no sugar,

phone-free mornings, deep work, sleep optimization and more.

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Curious what experiments IH makers would actually run?

What would you measure to know if something worked for you?