Every choice here was made on purpose

For about ten years I worked inside the systems meant to catch people. Schools, psychiatric hospitals, crisis stabilization, addiction treatment. I kept seeing the same thing. A person would describe something real happening in their body, the tests would come back clean, and they would leave believing themselves a little less. There was no honest, ongoing record of what a person's body was actually doing between appointments. Revago exists to keep that record. Not to treat it. To measure it.

The idea, which a registered study is designed to explore and which is not yet answered, is that a person-specific record of resting vagally mediated heart rate variability, together with how the body reacts to a brief stressor and how long it takes to recover, captured over time and compared with no one but themselves, is feasible to collect and meaningful to watch. That is a hypothesis. It is not a result. We do not yet know the answer, and we will not pretend to.

Heart rate variability, and RMSSD in particular. We chose the most established measure of short-term vagally mediated heart rate variability, not a novel one, and one that stays valid in the short recording windows real life allows.

The Polar H10 chest strap. We chose hardware that is accurate against clinical ECG at rest, so the measurement rests on the device, not on our claims about it.

Rest, reactivity, and recovery, not a resting number alone. How a nervous system responds to a demand and how quickly it returns is a richer, more personal picture. This structure is not ours; it is a published framework, and we apply it at a level of specificity that has not been operationalized before.

Idiographic, compared only with yourself. Each person is measured against their own baseline over time, not against a population norm that may not fit them. No scores against anyone else.

A standardized, seated protocol. A controlled sequence, held seated throughout, makes your captures comparable to your own over time, so what you are seeing is a real pattern and not noise.

Time-domain measures only. We stay with the measures that are robust in short, real-world windows rather than reaching for metrics that demand cleaner, longer recordings than daily life allows.

One study is registered. Its analysis plan was written in advance with a methodologist and powered to a defined minimum before any data is collected. We built the instrument to be tested, not to be believed on faith.

Revago is exploratory. Nothing about it is validated yet. The study has not begun, and it makes no claim to treat, improve, or resolve anything. That is not fine print. It is the reason a careful person can trust everything above it. Anyone can promise a result. Almost no one shows their reasoning and names their limits. That is what we are offering.