Frequency Counter+ Hz FFT vs Frequency Analyzer

Frequency Counter+ turns your iPhone into a precise audio analyzer with four purpose-built modes. Measure the dominant frequency of any sound, tune an instrument, read motor RPM by ear, or check the stability of your 50/60 Hz mains. FOUR MODES • Music — instrument tuner showing note name (A4, F#5) and cents off pitch (A4=440 Hz). • Motor — RPM displayed first, with hints for 1500/1800/3000/3600 RPM standards. • Hum — 50/60 Hz mains lock with deviation in ±0.01 Hz. • Auto — Hz reading with closest musical note or mains harmonic shown live. WHAT'S NEW • Measurement History — every reading is auto-saved with a 7-day trend chart and insights like "+12% vs your 7-day average". • Notes & Favorites — add a note ("fridge", "room 1") and star to any saved reading. • Compare Mode — pick two saved measurements and view the difference side by side. • Calibration Offset — fine-tune your microphone in ±0.1 Hz steps. • Share Result — share your current frequency reading as an image. • CSV Export — share all your measurements as CSV for spreadsheets. CORE FEATURES • Precise dominant frequency measurement (Hz) • Large multimeter-style digital display • Automatic 50/60 Hz mains hum detection with lock indicator • Instant Hz-to-RPM conversion • Waveform and amplitude visualization • Microphone calibration FOR MUSICIANS · AUDIO ENGINEERS · ELECTRICIANS · MECHANICS · HVAC TECHS · INDUSTRIAL DIAGNOSTICS Available in 14 languages.

Frequency Analyzer: SpectraLab is a professional-grade audio analysis tool designed for real-world measurements, sound diagnostics, and signal verification — completely rebuilt as a native iOS app with a brand-new Liquid Glass design. Whether you're tuning a room, analyzing noise, or working with audio signals, SpectraLab provides fast, accurate, and easy-to-read results. KEY FEATURES - Real-time Frequency Analysis Detect dominant frequencies instantly using high-resolution FFT analysis. - Live Spectrum Visualization See how sound evolves over time with a smooth, responsive spectrum graph. - Peak Hold Track the highest detected frequencies over time for deeper analysis. - Spectrogram Visualize frequency content over time with a scrolling waterfall display. - Signal Generator Generate precise tones including sine waves, square waves, pink noise, and white noise. - Play & Analyze Mode Compare generated signals with live microphone input in real time. - Screenshot & Export Capture clean analyzer views and share results instantly. - Home Screen Widget See your latest measurement at a glance, right from your Home Screen. - Custom Presets Save and reuse your favorite generator settings. USE CASES - Room acoustics and speaker tuning - Audio testing and debugging - Music practice and instrument tuning - Environmental noise analysis and documentation - Education and signal learning DESIGNED FOR PRECISION SpectraLab focuses on stability, clarity, and performance. The interface is optimized for both beginners and advanced users, providing clean visuals without unnecessary complexity. PRO FEATURES - Noise Threshold Alerts — get notified the moment sound crosses a level you set, useful for documenting noise complaints or monitoring a space - A-weighting (dBA) — measure noise the way ordinances and regulations do, plus every window function for precise analysis - Extended Spectrogram History — see up to 3 minutes of waterfall history for deeper diagnostics - CSV Data Export — export raw frequency and magnitude data for analysis in Excel, Python, or MATLAB - Professional PDF Reports — share a clean, presentable report of any measurement - Unlimited Export History — free plan keeps your last 10 exports; Pro keeps everything - Larger FFT sizes up to 16k-point transforms for finer resolution - Unlimited custom presets A free trial is available so you can experience Pro before you subscribe. Start analyzing sound with precision today. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/