FreqCheck : See Sound
ISO 17025 Certified Analyzer
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Identify the source of the Hum or verify the content of audio/video tracks. FreqCheck is the world's first NIST-Traceable, ISO-aligned frequency analyzer.
You've heard it. That low, persistent hum no one else seems to notice. That frequency track promising precise therapeutic tones that may or may not actually be there. That vibration in your chest you cannot explain.
It doesn’t matter what you were told, FreqCheck lets you measure it.
NOW YOU CAN SEE WHAT YOU'RE LISTENING T0
FreqCheck is the first ISO/IEC 17025:2017 certified frequency analyzer built for iPhone/iPad, covering the full 1 to 100 Hz spectrum where the most consequential and most contested signals in the world actually live. For scientists, investigators, wellness researchers, and the simply curious — FreqCheck speaks one language: physics.
One tap. See it. Know it. Prove it.
THE MOMENT THE SCREEN COMES ALIVE
At rest, the display is clean and silent. Meters at zero. No false signals.
Then you tap LIVE.
A waveform explodes onto your screen in real time. Precision meters lock instantly. No configuration. No setup. Single-tap activation is the entire workflow.
Three input modes handle everything:
LIVE — Point your microphone at any source. Spectrum analysis begins the moment you tap (Supports External Mics/DC Coupled Line-In).
VIDEO — Select a video file and forensically extract every frequency in its audio track.
AUDIO — Select any audio file and audit the actual signal against whatever the content claims.
FOR THE MYSTERY HUM INVESTIGATORS
If you have heard it, sound that passes through walls and disrupts sleep, you are not alone.
Researchers worldwide point to 50-80 Hz as the primary candidate for the "global hum". That range is inside FreqCheck's window, and your iPhone/iPad microphone will easily pick it up the moment it is present. FreqCheck locks the frequency, timestamps it, and generates a sealed report you can share.
You knew there was something, FreqCheck tells you exactly what it is.
This is not a theory. This is metrology.
FOR THE WELLNESS AND FREQUENCY COMMUNITY
That track promising binaural beats, brainwave-entrainment frequencies, or therapeutic tones deserves one honest question: is the signal actually there?
FreqCheck has that answer in seconds. Brainwave frequencies Delta, Theta, Alpha, Gamma, fall within the 1 to 100 Hz range FreqCheck was built to analyze. If the signal is present, FreqCheck confirms it. If the measurement tells a different story, you will see that too.
Replace Blind Trust With Certainty. Precision as easy to use as a measuring tape.
FORENSIC-GRADE PROOF. IN YOUR POCKET.
Every measurement is sealed by three forensic layers:
Device-Hash Anchoring — locks data to the verified hardware signature of your specific iPhone/iPad.
SHA-256 Sealing — mathematically seals the captured data at the moment of report generation.
Digitally Signed PDF Reports — any alteration after generation fully invalidates the document.
The result is a NIST-traceable PDF Audit Report with the same evidentiary weight as a controlled laboratory result. Certification 05122C9A 2602.
ALWAYS FREE. UPGRADE WHEN READY.
Free: 5 scans per session. See a short ad to reload 5 more. Unlimited. Forever.
Remove Ads: $2.99 one-time.
Pro Analyst Monthly: $19.99 per month with a 7-day free trial.
Pro Analyst Lifetime: $149.99 one-time.
Pro unlocks the LOGS vault, full PDF Audit Report export, and community forum posting, where investigators, researchers, and the genuinely curious are already sharing what they have found.
THE MICROSCOPE MOMENT
The microscope did not create bacteria. It revealed what was always there.
GPS did not create your location. It made it knowable.
FreqCheck makes the 1-100Hz infrasonic spectrum visible, measurable, and provable with the device in your hand.
You do not need a degree. You need one tap.
Privacy Policy: https://freqcheck.com/privacy.html
Terms of Use: https://freqcheck.com/terms.html
DISCLAIMER: FreqCheck is a Calibrated Frequency Measurement Analysis Tool designed strictly for educational and research purposes. It is not intended for medical diagnosis.
Ratings & Reviews
This updates the IND Core™ Forensic Integrity Sealing architecture, upgrading the structural integrity of all exported data. Cryptographic Sealing: All real-time spectral telemetry mathematically locked using SHA-256 hashing at the millisecond of capture. Hardware Anchoring: PDF Audit Reports utilize true cryptographic device-hashing, permanently binding exported data to the physical hardware that recorded it. Immutable PDF Exports: Exported reports feature a digitally signed Master Seal in the footer, verifying the absolute forensic integrity of your acoustic measurements. Engine Optimization: Minor performance enhancements to the rolling high-resolution memory buffer.
The developer, Abundance Sea, LLC, 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
- Abundance Sea, LLC
- Size
- 17 MB
- Category
- Utilities
- Compatibility
Requires iOS 18.6 or later.
- iPhone
Requires iOS 18.6 or later. - iPad
Requires iPadOS 18.6 or later. - Mac
Requires macOS 15.6 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.6 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Remove Ads $2.99
- Pro Analyst – Lifetime $149.99
- Pro Analyst $19.99
- Copyright
- Copyright © 2025-2026 Abundance Sea, LLC. All Rights Reserved. Patent Pending 19/422,049. IND™ Technology is ISO 17025:2017 Calibrated (Cert #05122C9A 2602).