Google Health 5.10 is live on iOS and rolling out to Android users this week — a modest but pointed update focused on Japan, sleep personalization, and user control over logged data. No new hardware. No global rollout of the AFib detection. Just three changes, each with clear boundaries: one regional, one algorithmic, one conversational. It arrives quietly, no press release, no keynote slide. As Google continues to treat Health not as a consumer-facing flagship app but as infrastructure: functional, incremental, and tightly scoped. The Irregular Rhythm Notification feature is now available only in Japan, and only on Pixel Watch and Fitbit devices. It runs passively during stillness or sleep, scanning for atrial fibrillation patterns. Users must opt in via the Health tab inside the Google Health app, it doesn’t auto-enable. Support remains device- and market-locked. There’s no mention of expansion to Wear OS watches from other brands, nor to the US, EU, or India. Meanwhile, the Readiness Score. Google’s composite metric for daily physical preparedness, now pulls in additional sleep signals. The update doesn’t specify which ones (e.g., REM latency, heart rate variability depth, movement fragmentation), only that the weighting has shifted to make the score “more personalized.” That’s a quiet tweak to a feature already criticized for opacity. And one that still lacks public documentation on how inputs translate to output. The third change is the most user-facing: voice- and text-based deletion. If you log a run, meal, weight entry, or symptom via Google Health Coach, the AI assistant built into the app. You can now say or type something like “Delete the run I logged this morning” and it’ll vanish. Medical records remain off-limits. So do manual entries made outside the coach interface. This isn’t bulk deletion. It’s surgical, contextual, and limited to what the coach itself handled. There’s no pricing. No hardware dependency beyond existing Pixel Watch and Fitbit models sold in Japan. No Indian or US launch window cited. No mention of regulatory clearance elsewhere, just a Help Center link for Japan-specific setup. What happens next? Rollout continues for Android users. Japanese users with compatible wearables will see the AFib toggle appear in-app. Everyone else waits. For clarity on Readiness Score methodology, for broader AFib availability, or for the next version to nudge the needle again.