The iPhone’s Always‑On display keeps key information visible without waking the phone, presenting the time, date, Lock Screen widgets, and critical notifications in a dimmed, low‑power state. Adaptive refresh rates scale down when the phone is stationary to conserve battery, while ambient light and True Tone maintain comfortable visibility. Integration with Focus modes, Do Not Disturb, and notification summaries lets you control what appears at a glance, and Face ID security remains intact—detailed content stays hidden until the device is authenticated. Developers can surface glanceable updates via widgets, and system features like Live Activities continue updating in the background with minimal energy impact.