Phone Warmer is a cold-weather companion built around visual focus, audio, and device-awareness cues. It is not a heater and should never be used as a substitute for warm clothing, shelter, or proper device care.
Start a short comfort session
Choose a comfortable visual and audio setting, keep screen brightness reasonable, and use the session as a calm focal point during a cold commute or outdoor wait.
Watch the device, not just the timer
Cold temperatures can reduce battery performance. Keep the phone dry, avoid abrupt temperature changes, and stop using it if the device shows a temperature warning or behaves unexpectedly.
Put physical safety first
Move indoors when conditions are unsafe. Do not place the phone against bare skin for warmth, near an external heat source, inside heating equipment, or anywhere that blocks ventilation. Follow Apple guidance for the device's operating temperature.