Sensor Viewer vs ClearEther
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sensor Viewer
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Visualise the data from 3 of your phone's sensors And adjust the sensitivity of the sensors to match the sounds, vibrations or magnetic fields you're measuring For sounds: See a sound wave for all sounds picked up by the microphone For Vibrations: See 3 line graphs showing the movements of the phone, 1 line per dimension (up/down, left/right, forwards/backwards) For Magnetic Fields: See a graph of the magnetic field your phone can detect, even if that's just your speakers or the batteries in some of your other devices Supports Light Mode / Dark Mode Supports Dynamic Text Sizing Supports English, French, Spanish, German Optional one-time in-app purchase available to remove ads permanently. Purchases can be restored on supported devices using the same Apple ID or Optional auto-renewing subscription available to remove ads. Subscription automatically renews unless cancelled at least 24 hours before the end of the current period. You can manage or cancel your subscription in your App Store account settings. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://salisburyapps.co.uk/privacy-policy-sensor-viewer/
ClearEther
This app uses your device's sensors to passively measure and report ambient radio activity. It provides an exposure score based on Wi-Fi, Bluetooth, cellular signals, and magnetic fields, with adjustable weighting. View historical data, map cell tower locations, and understand your radio environment without accounts or ads.
- Ambient radio activity measurement
- Wi-Fi, Bluetooth, Cellular, Magnetic field detection
- Adjustable exposure score weighting
- Historical data and map view
- Cell tower distance estimation
- Privacy-focused, no accounts or ads
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ClearEther is a native app for iPhone, iPad, and Mac that passively reports the ambient radio activity around you — using only the sensors built into your device. It is an informational tool, not a medical instrument. WHAT IT MEASURES • Wi‑Fi on 2.4 / 5 / 6 GHz bands (MacOS only) • Bluetooth Low Energy (2.4 GHz) • Cellular: LTE (700 MHz – 2.6 GHz), 5G sub‑6 (~3.5 GHz), 5G mmWave (24–40 GHz) • Magnetic field (microtesla) via the magnetometer (iOS only) EXPOSURE SCORE ClearEther combines readings into a transparent 0–1 index — calm, busy, loud, saturated. The weight of every vector (Wi‑Fi, BLE, cellular, magnetic) is fully adjustable in Settings. No black box, no marketing math: just numbers you can re-weight to match what you care about. HISTORY & MAP • Save snapshots with timestamps and location tags • Map view shows past measurement locations and the estimated distance to nearby cell towers (using the public OpenCellID database) • Trend chart for exposure over time PRIVACY BY DEFAULT • No accounts, no sign-up • No analytics, no ads, no third-party SDKs • No backend — your data stays on your device • Location is optional and is used only to estimate distance to cell towers • Only public cell identifiers are sent to OpenCellID for tower lookup WHO IT'S FOR • People curious about their radio environment — what their router emits, how many BLE devices are nearby, where the closest cell tower is • Hobbyists, ham radio operators, and anyone who likes seeing real signal data • Anyone comparing RF activity across places (home vs. office vs. commute) WHAT IT IS NOT ClearEther is not a certified meter. It does not diagnose, treat, or assess health risk. It surfaces what your device's sensors can already report, with a transparent explanation of how the score is computed — and lets you re-weight everything yourself. It is a measurement and awareness utility, not safety equipment. Try ClearEther free for 3 days, then unlock it forever with a single in-app purchase. No subscription. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: ClearEther at none against Sensor Viewer's 2. ClearEther also leads on device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Sensor Viewer sells 2 in-app purchases, starting at $0.99 per year. ClearEther asks for nothing beyond the download.
| Parameter | Sensor Viewer | ClearEther |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | — | Fortnightly |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone | iPhone, iPad, Mac — better |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 2 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Salisbury Apps | Pawel Szydlowski |
In-app purchases
Sensor Viewer
- Annual Subscription$0.991 Year
- One time / Lifetime purchase$1.99
ClearEther
No in-app purchases








