An open-source alternative to SØPHIA
Same passive Wi-Fi and Bluetooth scan, free, with the source on GitHub.
Download the APKSource on GitHub
Free, Android 8.0 or newer, runs on GrapheneOS without Google services. No account.
SØPHIA is a paid passive Wi-Fi and Bluetooth scanner sold on Gumroad. Funkblick does the same job for free, with the source on GitHub, and adds tracker protection, speed cameras and channel tips. Comparison based on SØPHIA’s product page in November 2026.
Side by side
| SØPHIA Android 2.2.1 | Funkblick | |
|---|---|---|
| Price | $39, closed source | free, GPL-3.0 |
| Wi-Fi + BLE radar | yes | yes |
| Maker lookup (IEEE /24, /28, /36) | yes | yes, 54,000 prefixes |
| Watch and mute rules | yes | yes, mute wins |
| Voice alerts | audio alerts | own sound per kind + voice, EN/DE |
| Tracker protection (AirTag & co.) | no | yes, with the 10-minute rule |
| Speed cameras | no | fixed cameras from OpenStreetMap |
| Channel tips | no | yes |
| Export | CSV, JSON, AI debrief | CSV, JSON, AI debrief, session logs |
| Updates | download again from Gumroad | updates itself from GitHub |
What Funkblick can’t do
- No direction. A phone only measures how strong a signal is. The angle on the radar is a fixed spot per device, not a compass.
- Access points only. Android lists Wi-Fi routers and hotspots, not devices that are merely connected. A camera on someone’s home network stays invisible.
- No police radio. Police and EMS talk over TETRA or P25, which no phone can receive. Funkblick only sees the Wi-Fi and Bluetooth of their gear, if it has any.
- Random addresses. Phones and trackers change their Bluetooth address. Funkblick then reads what the device broadcasts instead of guessing the maker.