Flip Unit vs Hear the Light

Flip Unit: The unit converter built for everyone. Convert across 12 categories — cooking, distance, temperature, weight, area, volume, currency, pressure, power, speed, data, and fuel consumption — on your iPhone, Apple Watch, home screen, and lock screen. All for free. No ads, no tracking, no account required. NEW IN VERSION 2.0 • Apple Watch app — full converter on your wrist with haptic feedback • 12 Apple Watch complications — one-tap access to any category right from your watch face • 7 widgets for iPhone — quick-launch any category from your home screen, plus live currency rates on home and lock screens • iCloud sync — preferences and history across your iPhones and iPads, invisibly • 5 new categories: Pressure, Power, Speed, Data Storage, Fuel Consumption • Background rate refresh — currency widgets stay up to date without opening the app CONVERSIONS INCLUDED • Area — square feet, meters, acres, hectares • Cooking — cups, ml, tablespoons, grams, with ingredient-specific weights for flour, sugar, rice, butter, and more • Currency — 162+ currencies with live rates • Data / Storage — KB, MB, GB, TB (decimal and binary) • Distance — miles, km, feet, meters • Fuel Consumption — MPG (US & UK), L/100km, km/L • Power — watts, kilowatts, horsepower • Pressure — PSI, bar, atmospheres, pascal • Speed — mph, km/h, knots, m/s • Temperature — Fahrenheit, Celsius, Kelvin • Volume — litres, gallons, pints, fluid ounces (US & Imperial) • Weight — lbs, kg, ounces, grams WHY FLIP UNIT? • Lightning fast • Remembers your last-used units per category, on every device • Clean, simple interface • Works offline (except currency rates) • No account required • No ads or tracking Perfect for cooking, travel, business, home improvement, and everyday use. ACCESSIBILITY FIRST Flip Unit is designed for blind and low-vision users from the ground up. Full VoiceOver support, haptic feedback on iPhone and Apple Watch, Reduce Motion awareness, Dynamic Type, and WCAG AA contrast.

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.