Unit Converter vs ChirpAlarm

ConvertMaster is a completely free, ad-free unit converter. Launch and go. No sign-up. No data collection. All 40 categories are permanently free. No paywalls. ALL FEATURES FREE FOREVER: • 40 categories — currency, length, weight, area, volume, temperature, speed, time, pressure, energy, power, data storage, cooking, angle, fuel, force, torque and more • 200+ currencies with live exchange rates, updated hourly • Currency picker with search — find any currency instantly • Multilingual currency names (CLDR standard) • Home page ranks categories by your usage frequency • Restores your last-used category on launch • Batch convert — enter multiple values, see all results instantly • CSV export for batch results • Metric and imperial side by side • Scientific notation for extreme values • Dark mode • 100% offline (except live currency rates) No account. No sign-up. No data collection. No internet required (except live rates). Most converters limit their currency list or lock categories behind paywalls. ConvertMaster gives you everything — 200+ currencies with search, 40 categories — all for free, forever. Voluntary support available in app — optional, never nagged. No data collected. No tracking. No sharing. Your numbers, on your device only.

When your alarm fires, you hear a real bird recording sourced from xeno-canto. To dismiss the alarm, you need to identify the species from the provided options. Start your day surrounded by birds, and sharpen your sound ID abilities every day! What's inside Real recordings — every alarm plays an authentic field recording from your list. Your species list — browse and search xeno-canto, preview recordings, and choose which birds wake you up each day. Multiple lists can be managed. Quiz to dismiss — multiple choice to ensure that you're awake, improve your sound ID skills. Stats — your quiz history, so you can track which species you've learned and which ones keep getting you. Bird Info — An image and a short description of the bird will be shown to you before you dismiss the alarm. No ads. No subscription. One purchase. Who it's for Birders who want to start the day with their hobby and improve their sound ID skills. Anyone for whom a blaring alarm is just a bad way to begin.