Frequency Generator & Analyzer
Hz Tone Test & Audio Measure
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Turn your iPhone into a professional-grade acoustic laboratory. Powered by the high-fidelity YIN pitch detection algorithm, Frequency Counter delivers instant, real-time audio frequency analysis and tone synthesis with uncompromising engineering precision.
Whether you are testing audio equipment, analyzing ambient sound waves, tuning musical instruments, or calculating motor RPM, this app provides the advanced tools you need in a clean, high-contrast visual dashboard.
KEY FEATURES
1. REAL-TIME AUDIO ANALYSIS & SPECTROGRAPH
High-Fidelity Pitch Detection: Track real-time sound frequencies instantly with exact readouts in Hertz (Hz).
Live Oscilloscope Grid: Visualize active sound waves on a sweeping, highly responsive neon coordinate grid.
Signal Gain Adjuster: Amplify low-amplitude ambient sounds easily by adjusting the visual height of the oscilloscope lines.
Music Note Translator: Automatically convert active frequency measurements to the closest corresponding musical note (based on standard A4 = 440 Hz tuning).
2. ADVANCED STATS & ANALYTICS (PRO)
Live Session Tracker: Monitor Minimum, Maximum, and Average frequencies detected during your active scanning session.
Integrated Decibel Meter: View current volume levels (dB) directly alongside your frequency readout.
RPM Speed Calculator: Measure the speeds of rotating fans, propellers, or motors with a configurable blade multiplier (1 to 8 blades).
3. PRECISION SCAN CONTROLS
Freeze Screen: Freeze the active frequency readout and grid at any moment to inspect specific sound intervals.
Reset Peak Meter: Instantly clear out the highest recorded peak frequency with a single tap.
Start/Stop Engine: Complete control over your microphone input scanning sessions.
4. PROCEDURAL SOUND WAVE GENERATOR (PRO)
Real-Time Sound Synthesis: Generate continuous tones supporting four reference waveforms: Sine (Cyan), Square (Green), Sawtooth (Orange), and Triangle (Purple).
Tactile Tuning Pad: Fine-tune your output with incremental coarse buttons (-100, -10, -1, +1, +10, +100 Hz).
Interactive Sweepers: Seamlessly navigate the human hearing spectrum (20 Hz - 20 kHz) using linear volume and logarithmic sweep sliders.
Direct Hz Keyboard: Double-tap the main Hertz indicator to type your exact desired frequency via a dedicated number pad.
GO PRO WITH FREQUENCY COUNTER PREMIUM
Unlock the full analytical power of your device. Premium subscriptions remove all session limits and unlock:
Unlimited scanning sessions and freeze-frame analysis.
Full access to the Procedural Sound Wave Generator.
Complete Stats Dashboard (Min/Max/Avg Tracker, dB Meter, and RPM Calculator).
Choose from our flexible Premium plans: Weekly, Monthly, or Yearly subscriptions.
Note: Microphone access is strictly required for real-time frequency analysis. All audio processing is performed locally on your device; your data remains completely private.
Choose Your Plan
Unlock the full analytical power of Frequency Counter. Get unlimited scanning sessions, full access to the advanced sound wave generator, and real-time tracking tools.
Weekly Access — $1.99 / week (Most Popular)
Monthly Pass — $4.99 / month
Annual Saver — $29.99 / year (Best Value)
Cancel anytime in your App Store account settings. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period.
Terms of Service : https://sites.google.com/view/freqmeterterms/home
Privacy Policy : https://sites.google.com/view/freqcounterpolicy/home
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, CODIGITAL SOLUTIONS, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- CODIGITAL SOLUTIONS - FZCO
- Size
- 48.6 MB
- Category
- Utilities
- Compatibility
Requires iOS 12.0 or later.
- iPhone
Requires iOS 12.0 or later. - iPad
Requires iPadOS 12.0 or later. - iPod touch
Requires iOS 12.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Pro Access $2.99
- Pro Access $29.99
- Pro Access $4.99
- Copyright
- © Codigital Solutions 2026