A tape measure, a metal detector and a spirit level: 25 surprisingly useful things you can do with your phone

December 21, 2025

TL;DR

Smartphones can function as tape measures using augmented reality.
Built-in magnetometers allow phones to act as basic metal detectors.
Phones can serve as universal remote controls for various devices.
Apps can digitize old holiday photos and negatives.
A 'Hold Assist' feature notifies users when a human voice is on the other end of a call.
Depth sensors enable 3D scanning of objects and spaces.
GPS functionality works offline for mapping hikes and outdoor activities.
Smartphones can be used to measure heartbeats, functioning as a stethoscope.
Accessibility settings offer various sounds for sleep induction.
Color-matching apps help identify and sample paint colors.
Live translation features can translate menus and signs through the camera.
AI-powered apps can identify plants and other objects.
Phones can be used as high-quality webcams.
Decibel-measuring apps can monitor sound levels.
NFC stickers can create ad-hoc smart home routines.
Built-in spirit levels help hang items straight.
Documents can be scanned and converted into digital files.
Photos can be transformed into animated 'memories' with music and transitions.
Health apps can estimate blood oxygen saturation.
Phones can control presentations remotely.
Live location sharing enhances personal safety.
Nutrition apps help track diet and calorie intake.
Phones can be used as mini podcast studios with external microphones.
Voice control can automate tasks and commands.
Shopping list apps allow for shared, real-time list management.

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