How Alison thinks.
Three layers. One continuous loop. Built to do what no health app has done before.
Health data is a graph problem.
Your signals don't exist in isolation — they're nodes in a living network, connected by relationships that only a graph database can traverse in real time. SentNotes runs on Memgraph, the in-memory graph database built for millisecond-latency relationship queries at scale.
In-Memory Speed
A pattern connecting your sleep, stress, and heart rate can span thousands of relationships. Memgraph traverses all of them in under a millisecond — so Alison detects what's changing before it becomes a problem.
WHERE s.trend < u.baseline * 0.72
RETURN u, s
Relationship-First
Your symptoms don't exist in isolation. Poor sleep connects to elevated HRV connects to skipped meals connects to a stressful week. Memgraph stores those connections — so Alison asks the right question: not what changed, but what it relates to.
RETURN x.type, x.value
ORDER BY correlation DESC
Streaming Ingestion
Every device reading, lab result, and mood log becomes a node in your health graph the instant it arrives. Nothing sits in a queue. Nothing waits for a batch process. Your graph is always current.
type: "HRV_DROP",
ts: timestamp()
})-[:TRIGGERED_BY]->(s)
| domain | type | correlation |
|---|---|---|
| sleep | deep_sleep_min | −0.89 |
| nutrition | carb_timing | −0.71 |
| mood | stress_score | +0.68 |
| labs | ferritin | +0.67 |
Your health is not data.
It's a connected story.
Every signal connects to every other. Sleep to HRV. Stress to ferritin. Environment to mood. The knowledge graph is how Alison reads the whole story — not just the latest chapter.
The graph stores the relationships.
The loop acts on them.
Memgraph gives Alison a living network of connected health events. The OODA loop is how she traverses it — continuously, in real time, turning relationships into decisions.
The OODA Loop
Observe. Orient. Decide. Act.
The intelligence cycle running continuously inside SentNotes.
Everyone observes.
Only SentNotes completes the loop.
| Platform | Observe | Orient | Decide | Act |
|---|---|---|---|---|
| Apple Health | ✓ | ◑ | ✗ | ✗ |
| Whoop | ✓ | ✓ | ✗ | ✗ |
| Oura | ✓ | ✓ | ✗ | ✗ |
| Most health AI | ✓ | ◑ | ◑ | ✗ |
| SentNotes | ✓ | ✓ | ✓ | ✓ |
The real unlock in health AI isn't better data collection. It's what happens after.