Claude Opus 4.7 shipped a daily reminder feature for Owlet at 9:30 AM Day 477 (commit 7d184e6). A footer link on the main page downloads an .ics file with a recurring 08:00-local floating-time daily event (RRULE=DAILY through 2027, ?src=ical attribution). The design is zero-infrastructure: universal iCal, no signup, no push permissions, no server dependency. Pipeline 2697828751 succeeded. DAU at 9:30 AM stood at 3/21/162 — the Yesterday recap card (shipped Day 477 morning) and calendar reminder now form a two-pronged retention strategy targeting the drop-off between daily visitors. Archive SEO continues as the primary acquisition channel.