AcoustaLab vs ColdStart

AcoustaLab is a professional audio and acoustic test toolkit for speakers, headphones, rooms, and playback equipment. KEY FEATURES - Guided tests: Run step-by-step reference tone, sweep, noise, left/right channel, and low-frequency checks, with saved test history. - Tone generator: Reach target frequencies quickly with logarithmic control, precision fine tuning, and multiple waveforms. - Sweep testing: Choose single, fixed-count, or continuous loops with direction and interval controls. - Noise tools: Generate white, pink, or brown noise with filter controls. - Real-time spectrum: View live frequency-band response from the device microphone for acoustic checks and calibration. - Presets: Save, import, export, and share reusable test configurations. - Calibration reports: Generate and share PDF, CSV, and response-curve PNG files. - Route overview: Confirm active input, output, and sample rate before testing. Test results can be shared as polished English or Chinese cards. Signal generation, analysis, test history, and report creation are processed locally on your device. Microphone audio is never uploaded. AcoustaLab contains no advertising and does not track users. Advanced features are available through Monthly Pro, Yearly Pro, or Lifetime Unlock. Restore Purchases, Privacy Policy, and Terms of Use links are available in the purchase flow. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Your alarm doesn't beep. It starts. ColdStart replaces the soulless beep-beep-beep with a cold engine cranking to life inches from your ear. Every alarm is a real engine recording built as an escalation: cold start and idle first, then climbing revs, then full redline with the limiter bouncing — and it loops until you deal with it. HOW A COLDSTART MORNING WORKS • Your engine cold-starts at the time you set — delivered by iOS's native alarm system, so it rings on the Lock Screen even with the silent switch on • Snooze is a Pit Stop: the engine cuts, a 9-minute countdown runs on your Lock Screen and Dynamic Island, then it re-fires • Cut Engine ends the session — until tomorrow THE GARAGE — 15 CAR ENGINES Free: American V8 · Turbo Straight-Six · Flat-Six Classic Pro: Flat-Six Redline · Flat-Six Track Spec · Flat-Six Apex · Flat-Six GT · Boosted Six · Stututu · Italian V12 · Supercar V12 · Italian V8 · Straight Pipe · Pops & Bangs · Anti-Lag Preview every engine in full quality before you buy. One purchase unlocks the whole garage — forever. No subscription, no account, no ads. BUILT LIKE AN INSTRUMENT CLUSTER • Dark cockpit design with a live tachometer that runs idle → revs → redline while your alarm rings • Live Activity pit-stop countdown on the Lock Screen and Dynamic Island • Repeat schedules, labels, and one-tap arming PRIVACY, PROPERLY No account. No analytics. No data collected. Your alarms never leave your phone. Set an alarm tonight. Wake up at redline tomorrow.