Comparison

Sensor Logger vs REEFER ALARM

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Sensor Logger

This app collects and displays data from various device sensors, including motion, GPS, and audio. It offers background recording, interactive plots, and multiple export formats. Advanced features allow for data streaming, systematic data collection from other users, and creating shareable data-driven dashboards.

Highlights
  • One-tap logging
  • Background recording
  • Interactive plot visualization
  • Data streaming (HTTP/MQTT)
  • CSV, JSON, Excel, KML exports
  • Create and share data dashboards
  • Systematic data collection studies
Features
Read full description

Sensor Logger collects, records and displays data from a range of sensors on iPhone, Apple Watch, iPad and AirPods — including accelerometer, gyroscope, GPS, audio, camera and Bluetooth devices. You can log device properties such as screen brightness, battery and network state. Select and preview desired sensors in a few taps. A single tap initiates the recording function, which works even when the app is in the background. View and manage recordings within the app via interactive plots. The app supports many export formats, including Zipped CSV, JSON, Excel, KML and more. For advanced use cases, stream data via HTTP or MQTT, resample measurements from multiple sensors, create Studies to collect data from other users systematically and write custom automation rules based on sensor, time and location. Once you have collected your data, you can create Stories — data-driven dashboard with your recordings, hosted online for effortless sharing. Sensor Logger is designed for researchers, educators, and anyone interested in collecting or monitoring sensors on their smartphone. It serves as the ultimate toolbox for exploring various fields, including physics, science, technology, engineering, and mathematics (STEM). - One-tap logging - Background recording - Recordings on interactive plots - Stream data via HTTP & MQTT - Intelligent, custom rule engine - Zipped CSV, JSON, Excel, KML & SQLite exports - Resample and aggregate measurements - Enable & disable specific sensors - Scan and log nearby Bluetooth devices - Add timestamp-synchronised annotations during recording - Adjust sampling frequency for sensor groups - Custom recording workflow - Raw and calibrated measurements available - Live plots and readings for sensors - Organise, sort and filter recordings - Control & track recording session from Watch - Bulk export & delete recordings - Resources to help you analyse your data - Data stays on-device and private - Create and share dashboard-style, data-driven Stories using your recordings, hosted online. Studies & Sensor Logger Cloud Create Studies to collect data from other Sensor Logger users efficiently. When activated, Studies use the investigator's specified sensor configuration for consistent data collection. Participants can upload their recordings to a secure cloud and join, pause, or switch Studies anytime. Studies include clear data usage descriptions, privacy statements, and contact details to ensure privacy compliance. Customize Study size, duration, sensor configuration, and export formats. Optional Paid Features (Plus, Pro & Ultimate) - No limitations on the number of stored recordings - Additional export formats - Combined CSV export - Customise recording workflow - Advanced sensor configurations - Custom naming templates - Theme and icon customizations - Unlimited Bluetooth beacons and no limit on the minimum RSSI - Create larger Studies with more participants - More allocated storage on Sensor Logger Cloud - Email support - Advanced study customization Supported Measurements - Device Acceleration (Accelerometer; Raw & Calibrated) - Gravity Vector (Accelerometer) - Device Rotation Rate (Gyro) - Device Orientation (Gyro Raw & Calibrated) - Magnetic Field (Magnetometer Raw & Calibrated) - Compass - Barometric Altitude (Barometer) - GPS Coordinate, Altitude, Speed & Heading - Audio (Microphone) - Loudness (Microphone) - Images (Front/Back) - Video (Front/Back) - Depth - Pedometer - Activity - Heart Rate (Watch) - Wrist Motion (Watch) - Location & Barometer (Watch) - Annotations (Timestamp and text) - Device battery level and state - Device screen brightness level - Nearby Bluetooth beacons (advertised data) - Headphone Motion (AirPods) - Network Heart rate logging requires integration with the Health app on the watch. Permission to access the heart rate from HealthKit on the watch is needed for the app to log the measurements. Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

REEFER ALARM

This utility app provides descriptions for reefer container alarms. It supports major brands like Daikin, Thermoking, and Carrier, offering quick access to alarm codes and their meanings.

Highlights
  • Reefer container alarm descriptions
  • Supports Daikin
  • Supports Thermoking
  • Supports Carrier
  • Quick access to alarm codes
Features
Read full description

REEFER CONTAINER ALARM DESCRIPTION. DAIKIN, TERMOKING, CARRIER

Screenshots

Sensor Logger4 screens
REEFER ALARM4 screens

Verdict

The call

The clearest difference is price: Sensor Logger at Free against REEFER ALARM's $4.99. Sensor Logger also leads on review sentiment (44% vs 0%). REEFER ALARM's advantage is in-app purchases (none vs 6). On ads, device support 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

CostPrice · In-app purchases · Ads · Monetization

Sensor Logger is free to download; REEFER ALARM costs $4.99 up front. Sensor Logger sells 6 in-app purchases, starting at $4.99 per month. REEFER ALARM asks for nothing beyond the download.

Scorecard4 real differences · 6 level
Sensor Logger versus REEFER ALARM: the parameters behind the verdict, then further details
ParameterSensor LoggerREEFER ALARM
PriceFree — better$4.99
Rating4.8 (111 ratings) — better—
Positive reviews44.4% of reviews — better0.0% of reviews
Number of ratings111 — better—
Update frequencyWeekly—
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPod
Requires iOS16.415.2 — better
Further details — not scored
Size81 MB3 MB
Age rating4+17+
DeveloperChoi Tsz HeiOleksii Nezhalskyi

Customer experience

Sensor Logger

All ratings111 ratings
Positive95.5%
Neutral2.7%
Negative1.8%
Written reviews9 reviews
Positive44.4%
Neutral22.2%
Negative33.3%

REEFER ALARM

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

6 purchases

Sensor Logger

Subscriptions6
  • Plus Monthly$4.991 Month
  • Pro Monthly$9.991 Month
  • Ultimate Monthly$24.991 Month
Show 3 more
  • Plus Yearly$49.991 Year
  • Pro Yearly$99.991 Year
  • Ultimate Yearly$249.991 Year
None

REEFER ALARM

No in-app purchases

Questions

Is Sensor Logger free?
Sensor Logger is free to download, with in-app purchases available.
Is REEFER ALARM free?
REEFER ALARM costs $4.99, with no in-app purchases.
Do Sensor Logger or REEFER ALARM have ads?
Neither Sensor Logger nor REEFER ALARM shows ads.

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