Cell Surveys: Signal Heatmap

Cell Surveys maps cellular signal strength wherever you go. Record, visualize, and analyze cellular signal, WiFi, Bluetooth, sound, and light readings, then watch a live signal heatmap build across your neighborhood, commute, or job site.

CELLULAR SIGNAL HEATMAP
Leave Cell Surveys running in the background and your personal signal heatmap builds automatically as you travel. See exactly where cellular signal strength drops, where coverage is strong, and how your carrier performs street by street.

SIGNAL STRENGTH SURVEYS
Start an on-demand survey to record cellular signal strength, WiFi, Bluetooth, sound, or light data as you move. Signal readings update in real time on a live chart while your path is traced on the map.

MULTIPLE SIGNAL TYPES
- Cellular signal: signal strength in dBm (RSRP, RSRQ, RSSI), carrier, network type, cell tower identity
- WiFi: nearby access points and signal levels
- Bluetooth: device scanning and signal strength
- Sound: ambient noise levels
- Light: ambient light sensor readings

FLEET DATA SHARING
Create or join a Fleet to pool signal data with up to 50 teammates. Share a token and PIN to invite members. Fleet heatmaps combine everyone's readings so your team can map cellular coverage across a wider area together.

COMMUNITY COVERAGE MAP
Enable the community layer to see aggregated, anonymous cellular signal data contributed by all Cell Surveys users. Get a broader view of network coverage beyond your own recordings.

SURVEY ARCHIVES
Every survey is saved locally on your device. Browse past surveys, filter by date or signal type, replay them on the map with animated markers, and export or share them as files.

IMPORT & EXPORT
Import survey files from other devices or teammates. Export your data as CSV files or share a ZIP bundle. Save live session data to your archive at any time.

BUILT FOR PRIVACY
Your signal data stays on your device unless you choose to share it. Community contributions are anonymous and aggregated. Fleet data is only visible to fleet members. No ads. No tracking.

Ideal for network engineers, IT professionals, field technicians, RF site survey and drive test work, researchers, or anyone curious about the cellular signal and wireless coverage around them.

Recent changes:
What's new in 1.14.0

• New: Cell Surveys Pro adds parcels, operator mode, and mileage and trip tracking. Signal heatmaps, coverage maps and survey recording stay free. Existing users get Pro free for 3 months.

• You may be asked once to rate the app, never while driving. You can also rate it any time from Settings.

• Survey archives: the Noise and Light filters are replaced by Magnetic.

• Removed: the API Keys and Pi Dashboard settings.