Measuring objects and distances
Your Android phone's camera is more versatile than you might think. When combined with the phone's built-in sensors, it can function as a tape measure. For Galaxy phone users, apps such as Tape Measure or Quick Measure can help estimate the size of objects. These apps detect flat surfaces and let you choose specific points for measurements. High-end Android devices use LiDAR technology for more accurate results. While convenient for everyday tasks, these tools are not reliable for situations where exact precision is needed.
Inexpensive Android models use ARCore's software to estimate depth, making them less accurate than LiDAR. Still, they provide a helpful alternative to traditional tools. Whether you're checking the dimensions of furniture, doorways, or even someone's height, these apps are handy. However, they should only be used for informal purposes, as they are not a substitute for professional measuring tools.
Light and noise level check
Every Android phone has a built-in ambient light sensor that automatically adjusts screen brightness. Apps like Light Meter can utilize this sensor to measure the amount of light in a space in lux. This is especially useful when designing a home office or ensuring your indoor plants receive adequate light. The app provides real-time measurements and even recommends ideal lighting levels for different environments, such as a library or a workshop.
Your phone's microphone can be used to check noise levels. With an app like Sound Meter, you can measure decibel levels in your environment. This is helpful for verifying if your sound system is playing at a safe volume or preparing a room for a recording setup. Note that phone microphones are designed for capturing human speech, so they may not be effective for extremely loud noises above 90 dB. Still, they handle most everyday noise checks with ease.
Android phone as a metal detector
Each Android phone includes a magnetometer, which is the sensor that powers compass apps and helps determine your direction in navigation apps like Google Maps. This same sensor can detect nearby metal objects, transforming your phone into a basic metal detector. Apps like Physics Toolbox Magnetometer can read the magnetic field in microtesla across the X, Y, and Z axes.
By moving your phone close to metal objects, you can immediately see the magnetic field measurements increase. This feature is useful for identifying metal in your home, diagnosing issues with speakers, or confirming the presence of metal before drilling. It works best with strong magnetic sources, such as magnets or loudspeakers, but it is not a substitute for professional-grade metal detection equipment.
Another handy use of your phone's sensors is as a spirit level. The combination of an accelerometer and gyroscope allows the phone to detect its position in space, which is what lets your screen rotate as you tilt the device. Apps like Bubble Level use these sensors to check if a wall mount or picture frame is perfectly level. Simply place your phone against the surface, and it will give you a clear indication of how straight it is.
The spirit level functionality is particularly useful for DIY projects or setting up shelves. The app visualizes the tilt of the surface you're measuring, ensuring things are aligned properly without the need for traditional bubble levels. While it may lack the precision of a professional tool, it's more than enough for minor home improvement tasks, such as hanging picture frames or mounting wall art.
In all cases, the built-in sensors on your Android phone provide a convenient and accessible way to perform basic measurements and checks in your daily life. They may not replace professional tools, but they do offer a cost-effective and practical alternative for casual use.
By taking advantage of these features, you can simplify tasks around the house, work, or school. From measuring the size of a room to checking if something is metal, your Android phone proves that it's far more than just a communication device — it's a mini toolbox in your pocket.
