Your feed optimizes for your attention.
Wristream optimizes for your well-being.

Short-form video is very good at keeping you watching. It was never built to notice what that does to you. Wristream reads signals from the smartwatch already on your wrist and learns which content genuinely leaves you better off.

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What your feed doesn't understand

Engagement is not well-being
Recommenders optimize for dwell time, completion rate, and replays. Those signals are easy to measure and tied directly to revenue. They are also a poor proxy for whether the last hour was good for you.
The worst content wins at the worst time
Optimizing purely for attention tends to surface high-arousal and stress-inducing material, and it does not care what time it is. That lands hardest late at night, when you are least equipped to close the app.
Your body is already keeping score
The watch on your wrist continuously measures heart rate, variability, and sleep. That signal already exists, it is continuous, and it reflects how you are actually doing. Nothing in your feed is listening to it.

What Wristream does differently

Closes the loop
Wristream measures how you actually responded to what you watched, and feeds that back into what it shows you next. Your body becomes part of the signal, not an afterthought.
Safety limits, not just preferences
Content likely to leave you worse off is filtered out before it reaches you. The system will not chain together high-arousal clips, and it falls back to calmer material rather than pushing through.
Knows when to wind down
As you approach your usual sleep time, Wristream shifts into a quieter mode: it stops experimenting and holds the feed below an arousal ceiling, so the last thing you watch is not the thing that keeps you up.
Private by construction
Physiological processing happens on your own device. Raw health data does not need to leave it, and the parts that make Wristream work keep functioning offline and on poor connections.
Adapts to you specifically
People differ enormously in how they respond to the same clip. Wristream learns your patterns rather than applying a population average, and keeps adjusting as those patterns change.
Uses the watch you own
Built for consumer wearables you already have: smartwatches, bands, and rings. No proprietary hardware, no extra device to buy, no sensor to strap on.