Cell Surveys: Signal Heatmap
Cellular Coverage Map & Zones
About
This app transforms your iPhone into a signal survey tool, passively collecting cellular data as you move. Visualize coverage with heatmaps, track mileage for deductions, and analyze signal performance with detailed charts and an AI assistant. It offers parcel-level data and prioritizes user privacy by storing data on-device.
What's New in Cell Surveys
1.2.3
August 11, 2026
Sign in with Apple is here. • Sign in with Apple, alongside Google — including Hide My Email. • Delete your account and all uploaded survey data from inside the app. • Google Drive backup connects separately, so it works whichever way you sign in. Plus faster maps, especially if you've been collecting for a while. • The coverage heatmap no longer slows down as your survey history grows. While a survey is running, refreshing the map used to re-read your entire history every 30 seconds — it now reads only what's new. • New signal readings appear on the map immediately, instead of re-processing every point already recorded. • Fixed saved survey timestamps being discarded when read back. • Less processing while a passive survey runs in the background.
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FAQ
What is Cell Surveys?
Cell Surveys turns your iPhone into a signal survey tool. It passively collects cellular signal data as you move, allowing you to view coverage heatmaps, track mileage, and identify dead zones on an interactive map.
How does Cell Surveys collect signal data?
It automatically records cellular signal strength in the background using GPS as you drive, walk, or commute. No manual effort is required for passive signal collection.
Can Cell Surveys track mileage for tax deductions?
Yes, the app features automatic trip detection that logs your drives for IRS mileage deductions. You can view trip history and driving time on the ellsurveys.com/mileage dashboard.
Does Cell Surveys have ads?
No, Cell Surveys does not contain advertisements. It is a completely ad-free application.
What devices does Cell Surveys support?
Cell Surveys is available for iPhone and iPad devices.
How is my data handled by Cell Surveys?
Cell Surveys prioritizes privacy by storing all data on-device by default. Location and signal data are never shared without your explicit consent.
What kind of signal data can be collected?
Beyond passive cellular signal strength, you can run on-demand surveys for cellular, WiFi, Bluetooth, ambient noise, and light levels, recording signal data along a path with real-time charts.
When was Cell Surveys last updated?
The latest version of Cell Surveys, 1.2.0, was last updated on July 21, 2026.