Sensor vs Explorer
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
Sensor
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SensorStream turns your iPhone and Apple Watch into real-time motion sensor tools. Select a device, choose the sensor streams you need, and view smooth live graphs with sampling- rate information. Record sessions locally and export the captured data as CSV files for analysis, research, testing, or development. Features include: ⢠iPhone and Apple Watch sensor streaming ⢠Accelerometer and gyroscope data ⢠Gravity and magnetic-field measurements ⢠Pitch, roll, yaw, quaternions, and rotation matrices ⢠Live sampling-rate display ⢠Selectable sensor channels ⢠Smooth, full-width graphs ⢠Local recording with pause and resume controls ⢠CSV file sharing and deletion ⢠Light and dark appearance support Available streams depend on the selected device and its hardware capabilities. SensorStream excludes HealthKit-dependent biometric data.
Explorer
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Explorer turns your iPhone into a full sensor logger. Start a session and it records your GPS track together with barometric pressure, compass heading, motion and activity data, step counts, and battery state ā in the foreground or with the screen locked. YOUR DATA STAYS YOURS Everything is stored on your device. No account, no analytics, no ads, no third-party SDKs. Data leaves your phone only when you export it ā and you choose where it goes. RECORD ⢠One-tap session recording with live dashboard: position, speed, altitude, G-force ⢠Background tracking that keeps logging while your screen is off ⢠Log points of interest with a tap - or hands-free with Siri: "Log a POI in Explorer" ⢠Per-sensor controls and sample rates to balance detail against battery EXPLORE ⢠Every session drawn on the map in its own color, with POI pins ⢠Live compass, motion, and environment views ⢠Browse every reading in the Data viewer with filters and charts ⢠Preview any session on a map before deleting it EXPORT ANYWHERE ⢠Share ZIPs of CSV or JSONL via Files, AirDrop, or Mail ⢠Or send data straight to your own server: any HTTP(S) endpoint, POST or PUT, custom headers, Bearer/Basic/API-key auth ā credentials kept in the iOS Keychain ⢠Filter exports by sensor type, session, and date range ⢠Full schema documentation built into the app (Help ā Data Reference) Explorer asks for location (including Always, for background recording) and motion permissions. Recording happens after you tap Start Tracking or open the app.
Screenshots
Verdict
Sensor and Explorer are too close to call on the numbers: across 5 compared parameters ā price, ads, in-app purchases and device support among them ā neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Sensor | Explorer |
|---|---|---|
| Price | Free | Free |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, Apple Watch ā better | iPhone |
| Requires iOS | 18.0 | 17.0 ā better |
| Further details ā not scored | ||
| Size | 30 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Yerim Lab LLC | James Bolderson |
In-app purchases
Sensor
No in-app purchases
Explorer
No in-app purchases









