A handy real-time audio spectrum and spectrogram analyzer
About this app
Audio Spectrum Analyzer was designed with accuracy and ease of use in mind. It can be used for monitoring or measuring environmental sound or noise; help tuning instruments; timing short sound events; and educational purpose.
Features:
* No Ads. * With log or linear frequency axis. * Can label frequency axis using music pitch note. * Support all possible sampling rates and almost all recorder sources of your device. * Graph with nice grid lines and labels, easy to operate. * FFT sample size range from 64 to 32768. Using half-overlapped (adjustable) time window to increase time resolution. * Various window functions provided, for different frequency resolution and dynamical range. * Peak frequency detection (in unit of Hz and note+cent), with a moderate accuracy (FFT + interpolation). * With dB or A-weighting dB (dBA). * Can record the audio in wav (PCM) format. * Pinch to zoom, drag or swipe to move, long-press to place cursor, double touch to reset zoom.
Notes: May need some knowledge of discrete Fourier transform and spectrum analysis to use it well. The actual accuracy mainly depends on your device. No calibration interface provided.
Licensed under Apache-2.0, by woheller69.
What's New in v3.2
Imported from the F-Droid repository index.
- Translation update
Version history
Mar 23, 2026 · 1.6 MB · Android API 14–35 · code 320
Imported from the F-Droid repository index.
- Translation update
SHA-256 0bed413d2a7a45c5c37c5cbd19efe3e49ab33725740aaf143324cf796ffcfaa9
Nov 7, 2025 · 1.6 MB · Android API 14–35 · code 310
Imported from the F-Droid repository index.
- Bugfix
SHA-256 038bc1bc5296fd817437bd5e337fc6c96a68f14e79c0bf8f64e65e2934a74bd1
Sep 9, 2025 · 1.6 MB · Android API 14–35 · code 300
Imported from the F-Droid repository index.
- Translations
- Deprecation warning
SHA-256 4c8bbc9b5d0f5bf8c0644641c1404bcf57bef0826394e5d482ae09a3c07f819c
Will it run on your device?
78%
- Runs on a broad range of modern Android versions.
- ABI coverage is focused on newer 64-bit devices.
- Aligned with the latest Android target SDK expectations.
Installation Guide
Open Settings on your Android device
Go to Security → Unknown sources (or Install unknown apps)
Enable "Allow from this source" for your browser or file manager
Open the downloaded APK file from your Downloads folder
Tap "Install" and wait for installation to complete
Launch the app from your home screen
Make sure to re-enable Unknown Sources restrictions after installation for security.
How to install this safely
How to verify the file you downloaded
Before you install anything, confirm the file is the one described here. On a computer, run shasum -a 256 your-download.apk (macOS or Linux) or certutil -hashfile your-download.apk SHA256 (Windows), then compare the output character-for-character with the SHA-256 on this page. If a single character differs, the file is not the build we recorded — delete it.
What the signing certificate proves
Every Android app is signed with a private key that only its developer holds. The fingerprint on this page is a hash of the matching public certificate, and it proves continuity rather than identity: it tells you a build came from whoever signed the earlier ones. Android enforces this at install time — if a package claiming to be org.woheller69.audio_analyzer_for_android is signed with a different key, the system will refuse to install it over your existing copy. A fingerprint that changes between releases is worth pausing on, because a repackaged app that has been modified by someone else cannot keep the original signature.
How to roll back to an earlier version
If the current release misbehaves, 3.1 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Audio Spectrum Analyzer first — which clears its local data unless you have a backup. Reinstall the older APK only if its signing fingerprint matches the build you already trust, and check the API range: an older release may target an Android version your device has moved past.
Why we list sources instead of hosting everything
The official store channel is almost always the right choice: it updates automatically and carries the publisher's own distribution guarantees. A direct APK is useful when a device has no store access, when a rollout has not reached your region, or when you need a specific version — and only when the publisher has authorized that copy. APKBrowse does not list pirated, cracked, or unauthorized rebuilds of Audio Spectrum Analyzer, and a listing is removed when the evidence for it stops holding up.
Get Audio Spectrum Analyzer
Every source we list for org.woheller69.audio_analyzer_for_android is legality-reviewed. Pirated or cracked builds are never offered.
Other sources
F-Droid listing
officialF-Droid builds this app from source and signs it. This is its official listing, with older builds and full release notes.
Source code
verified publisherThe upstream repository this build is compiled from.
We check legality and signature continuity, but device behaviour still varies. Install at your own discretion.
App Information
Security Verification
We record provenance; we do not run malware scans. Verify the hash yourself before installing.
SHA-256 Hash
0bed413d2a7a45c5c37c5cbd19efe3e49ab33725740aaf143324cf796ffcfaa9
Signing certificate
df8f63d3063460d7087588977de9b36427d606041b43dbfcf6e24cb44d7acf10
Permissions Required
Previous Versions
The signing certificate fingerprint for this release is on record, so a build that does not match it did not come from this publisher.
Report a problem with this listing
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