Vanishing Hour represents a sophisticated implementation of Watch Face Format for Wear OS, developed through an official collaboration between Layton Diament and Luka Kilic. The watch face stands out in the crowded marketplace through its conceptual approach to time display, originally conceived as a finalist in Motorola's 2014 Moto 360 design competition. This heritage lends credibility to its design philosophy while demonstrating longevity in the wearable space. The core functionality centers on a dynamic display where the current hour numeral remains centered until the minute hand progresses, creating the visual effect of time literally vanishing. This digital-analog hybrid implementation shows the hour in clear typography while maintaining traditional watch hands for minutes. Additional features include date display capability, ambient mode support, and customization options accessible through the Wear OS companion app. The implementation leverages modern Watch Face Format standards ensuring compatibility across recent Wear OS devices while optimizing battery performance through efficient rendering techniques. User experience prioritizes glanceability with minimal visual clutter, making time telling instantaneous despite the philosophical concept. The interface maintains excellent readability in various lighting conditions through high-contrast design principles. Real-world usage patterns suggest particular appeal during short time-checking scenarios where users appreciate both the aesthetic appeal and the subtle reminder of time's passage. The always-on display implementation preserves the minimalist aesthetic while conserving battery life, though some users note limitations in always-on date visibility. User feedback trends indicate strong appreciation for the design concept and visual elegance, with multiple five-star reviews highlighting these aspects. Rachel Manigault (May 7, 2024) praises the date inclusion while suggesting always-on display enhancements. Zachari Tate (August 9, 2023) notes potential confusion regarding 24-hour format implementation, indicating some users desire additional customization options. Roy Al Miller (January 30, 2024) specifically commends the developer's responsive customer service when addressing compatibility issues. The watch face excels in conceptual originality and visual minimalism, particularly suited for users valuing philosophical time awareness and clean aesthetics. Limitations include somewhat restricted customization compared to more feature-rich alternatives and occasional user confusion regarding certain functionality implementations. Ideal use cases involve fashion-conscious Wear OS users seeking conversation-starting watch faces that balance artistic expression with practical timekeeping functionality.