FreqCheck : See Sound
ISO 17025 Certified Analyzer
About
This app analyzes sound frequencies from 1 to 100 Hz, allowing users to visualize and measure vibrations and tones. It offers three modes: live microphone input, video audio extraction, and audio file analysis, providing forensic-grade reports.
What's New in FreqCheck
2.0.2
August 13, 2026
Version 2.0.2: Advanced PIM Workflow Control Built-in dual preset slot memory within Pro Input Mode (PIM) allows you to save custom configurations for your most frequently used measurement hardware and sensors. You can instantly recall saved sample rates, voltage ceilings, and sensitivity coefficients with a single tap instead of re-entering variables manually in the field. This completely eliminates setup friction, letting you deploy your lab configuration and capture certified data instantly. Streamlined workflows ensure maximum efficiency during every acoustic audit.
MoreSubscription plans
Pro Analyst
Unlimited Scans NIST PDF Audit Reports & Forums no ads.
In-App Purchases
$149.99
Pro Analyst – Lifetime
Unlimited Scans NIST PDF Audit Reports & Forums no ads.
FAQ
What is FreqCheck?
FreqCheck is an ISO/IEC 17025:2017 certified frequency analyzer for iPhone and iPad. It measures sound frequencies in the 1 to 100 Hz spectrum, allowing users to see and analyze vibrations and tones.
Does FreqCheck have ads?
Yes, FreqCheck contains advertisements. As a free application with in-app purchase options, advertisements are displayed to support its continued development and availability.
What are the different modes in FreqCheck?
FreqCheck offers three input modes: LIVE for real-time microphone analysis, VIDEO to extract frequencies from video audio tracks, and AUDIO to audit the signal of any audio file.
How does FreqCheck ensure the accuracy of its reports?
Reports are sealed with forensic layers including Device-Hash Anchoring, SHA-256 Sealing, and are digitally signed PDFs. This ensures the data is locked to the device and any alteration invalidates the report.
What is the price of FreqCheck?
FreqCheck is available for free. There is an optional 'Pro Analyst' subscription available for $19.99 per month for users who require advanced features.
What devices does FreqCheck support?
FreqCheck is designed for iPhone and iPad devices. It supports external microphones and DC coupled line-in for enhanced audio input.
How often is FreqCheck updated?
The latest version, 1.1.1, was released on June 23, 2026. Updates are provided regularly to enhance functionality and reliability.
What is the age rating for FreqCheck?
FreqCheck has an age rating of 4+. This indicates it is suitable for users of all ages, with no mature content restrictions.