LevelThings vs Hear the Light

Level Things Turn your iPhone into a reliable, accurate spirit level and inclinometer. Level Things is a simple yet feature-packed tool for checking level, plumb, and measuring angles. In Level mode, audio tones guide you to level hands-free. The tone pulses faster as you approach level and becomes a solid sound when you're within a tenth of a degree. Two on-screen bubble vials — one horizontal, one vertical — give you an instant visual reference for both level and plumb. In Inclinometer mode, the current angle is spoken aloud at a regular interval so you can measure without looking at the screen. Set a zero reference to measure the difference between two surfaces. Use any edge of your phone as your measuring surface. Four on-screen buttons let you tell the app which edge is pointing down, and the display adjusts automatically. Calibrate the left and right edges with a simple two-point method for maximum accuracy. Freeze a reading with the volume down button. Fully compatible with VoiceOver.

Hear the Light turns light into sound, so you can "hear" where brightness is around you. It was designed from the ground up for people with vision loss. Point your device's back camera in any direction and listen to a tone that rises as the light gets stronger. This makes it easy to find a window, check whether a lamp is on, or tell if a device has an indicator light lit. What makes it stand out: It detects even very small device lights — such as the LED on a router, a TV on standby, or a charger. Of all the apps of this kind we have tested, it is the only one that reliably picks them up. For very faint lights, the room should be dark so they stand out from any other lighting. Extremely fast response: the tone changes instantly as you move the device, noticeably faster than other similar apps. Features: Vibration feedback with variable intensity, independent of sound: use sound, vibration, or both together. Ideal if you have trouble hearing. (Vibration requires an iPhone.) Colour recognition: hear the basic colour of a small light, for example red, green or blue. It is a helpful guide, with best results in a dark room, close to the light. Two sound modes: continuous tone or pulses. Three sensitivity levels, affecting both the sound and the vibration. Light intensity shown in lux (estimate), spoken aloud with a single tap. Built-in user guide. Fully accessible with VoiceOver. Two languages, Greek and English, adapting automatically to your device's language. Privacy first: It does not collect any personal data. No internet connection required. No advertising, no tracking. The camera is used only to measure light — it does not take or store photos. Note: the lux reading and the colour recognition are estimates based on the device's camera and may not always be exact.