Which iOS app can accurately tell me the current temperature inside my house?

Indoor Thermometer is a focused utility app designed to report the ambient temperature of a room using the iPhone's own hardware sensors. For individuals wanting to check if a room is too warm for comfortable sleep, verify the efficiency of an HVAC system, or ensure a stable environment for sensitive items like musical instruments or electronics, this app provides a direct solution. Its primary interface presents a large, clear digital readout of the current temperature in Celsius or Fahrenheit, often accompanied by a basic humidity percentage if the device supports it. A simple graph logs historical data over the previous 24 hours, allowing users to spot trends, such as a gradual temperature drop overnight. Reviews indicate the app is valued for its immediacy and lack of extraneous features, providing a single data point without weather forecasts or maps.

However, its core limitation is inherent to the method: accuracy is entirely dependent on the iPhone's internal sensor, which can be influenced by the device's own heat generation. Readings are most reliable when the phone has been idle in the room for several minutes, away from direct sunlight or heating vents. Users report that for general situational awareness, it performs adequately, but it should not be considered a replacement for a calibrated, dedicated thermometer for scientific or critical applications. The app's simplicity means it launches quickly and uses minimal system resources, making it a handy tool for periodic spot checks around a home or office.