Track your trend, not your nights.

One night is noise

Your BRI yesterday tells you almost nothing. It's affected by what you ate, what you drank, how stressed you were, whether the room was too warm, whether the dog was scratching at the door. Every individual night has too much noise to be a real signal.

Thirty nights, on the other hand, has the noise averaged out. Ninety nights tells you whether something is changing. That's the actual reason Trends is a Pro feature — not because we're hoarding the good stuff for paying users, but because the trend is the only honest way to know if anything you're trying is working.

What you get

30-day BRI trend

Daily BRI plotted with a smoothed moving average and severity bands (normal, mild, moderate, severe). You can tell at a glance whether you're trending up, down, or stable. Most people's first surprise is how variable night-to-night actually is.

90-day distribution

A histogram of which severity bucket your nights have fallen into over the last 3 months. Different shape than the average. If you're "moderate on average" but mostly normal with three terrible nights every two weeks, that's a different story than steady moderate every night. The distribution shows the shape of your sleep, not just its center.

Intervention impact tracking

You mark a date when you start something — a CPAP, an anti-snore pillow, side-sleep training, weight loss, a medication change. SomniSense calculates pre/post averages so you can see whether the intervention is moving your numbers. Honest about it: if your CPAP went on Monday and your numbers don't change in two weeks, the trend will tell you, and you can adjust.

Lifestyle Lab™ Factor Impact

After 14+ tagged nights, see which factors moved YOUR BRI most. (Full mechanism on the Lifestyle Lab™ page.)

Tonight Insight

Dynamic suggestion based on what worked or didn't yesterday. Example: "Last night BRI 21 (high). Tagged: alcohol + back-sleep. Tonight, try: ❌ no alcohol + 🛌 side-sleep." It's not magic — it's just a small reminder based on your own tags. But for the first 30 days, that small reminder is what makes the habit stick.

Free vs Pro on this feature

Free gives you 7-day history and per-night BRI scores. Enough to see if the app is detecting your snoring at all.

Pro adds:

• Unlimited history
• 30/90-day trends and distributions
• Lifestyle Lab™ Factor Impact
• Tonight Insight
• Manual PDF export
• Doctor-Ready Cadence™ (weekly + monthly auto-emailed PDF)

$7.99/month or $49.99/year. The reason trends are Pro: storing and computing 90-day rolling windows for every user is the actual cost driver of the cloud backend.

Why trends matter for the doctor visit

If you're considering whether to ask for a sleep study, your doctor doesn't want "what was BRI last Tuesday." They want "what's the typical pattern over weeks." The 30 and 90-day trend views give you that. Combined with Doctor-Ready Cadence™ monthly briefings, you walk into the visit with months of organized evidence — not three days of guessing.