Analyze RF signals on Android with HackRF, RTL-SDR, Airspy and HydraSDR.
About this app
RF Analyzer turns your Android device into a real-time spectrum analyzer for Software Defined Radio (SDR). Visualize and listen to radio signals around you - from amateur radio to broadcast signals and beyond.
Whether you're a curious beginner or a seasoned ham, RF Analyzer offers a hands-on, interactive way to explore radio signals.
FEATURES
- Works with HackRF, RTL-SDR, Airspy, Airspy HF, HydraSDR or pre-recorded IQ files - View live spectrum (FFT) and waterfall plots - Demodulate AM, FM, SSB, and CW signals - Record raw IQ samples for offline analysis - A responsive and modern Material Design interface - Scroll, zoom, and tune through the bands - Built-in context-aware help and a full offline in-app manual - Bookmarks for Stations and Bands - Import from SDR# or SDR++ - Automatically synchronize with online lists (EiBi DB, POTA & SOTA Spots)
REQUIREMENTS
- Android phone or tablet (with USB OTG support) - Supported SDR hardware (HackRF, RTL-SDR, Airspy (HF+) or HydraSDR) Note: The RTL-SDR Blog v4 is fully supported. - USB OTG adapter (USB-A female to USB-C for modern phones) Note: This is not necessary for SDRs with USB-C connector (e.g. the HydraSDR)
LEARN MORE
Want to go deeper? The full user manual is available online with signal identification tips, ham radio basics, and more: https://demantz.github.io/RFAnalyzer/
Have fun exploring, learning, and listening to radio signals :)
SUPPORT
This app is open-source so anyone can explore SDR without barriers and let the community benefit from a Google-free, privacy-respecting version. If you enjoy using it, please support the project - your donation helps keeping it alive and accessible to everyone.
73! - Dennis (DM4NTZ), Heidelberg, Germany
LICENSE
This application is released under the GNU General Public License v2. It is free software and the source code is available on GitHub.
LEGAL ISSUES
Please note that I am not responsible for any legal issues caused by the usage of this application. Be responsible and comply with your local law!
Licensed under GPL-2.0-or-later, by Dennis Mantz.
What's New in v2.2.1-foss
Imported from the F-Droid repository index.
Version history
Apr 29, 2026 · 21 MB · Android API 28–36 · code 20208
Imported from the F-Droid repository index.
SHA-256 07a5f5ab10f80a8bcad483c18c27428f6bf75012ab71aae8f4d4bcf1a3ebe9c6
Mar 18, 2026 · 18.5 MB · Android API 28–36 · code 20205
Imported from the F-Droid repository index.
SHA-256 2a1e09ca9af19e64da64166aad8fcc10a67d101fae068b8340269bb7354676c7
Oct 25, 2025 · 12.3 MB · Android API 28–36 · code 20107
Imported from the F-Droid repository index.
SHA-256 6c78222f3c34637e756ac7b89fc8f6641ba46288944a4ac81b9958172b99db11
Will it run on your device?
74%
- Targets newer Android builds, so legacy devices may be excluded.
- Multiple CPU architectures are covered.
- 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 com.mantz_it.rfanalyzer 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, 2.2-foss is the last build before it. Android will not install an older version code over a newer one, so you must uninstall RF Analyzer (FOSS) 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 RF Analyzer (FOSS), and a listing is removed when the evidence for it stops holding up.
Get RF Analyzer (FOSS)
Every source we list for com.mantz_it.rfanalyzer 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
07a5f5ab10f80a8bcad483c18c27428f6bf75012ab71aae8f4d4bcf1a3ebe9c6
Signing certificate
b67ae6476f6156a782b7f5f85a25c1c9dd9725d720d171ff98a7e588b9dff3da
Permissions Required
What each permission lets RF Analyzer (FOSS) do. A highlighted one is worth a second look — not necessarily wrong, just worth asking whether this app needs it.
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.
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