Comparison

Temtop vs Sensor Logger

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

Head to head
About

Temtop

This app detects formaldehyde, PM2.5, and TVOC using advanced sensors. It provides accurate and reliable environmental data for your home or workspace.

Highlights
  • Formaldehyde detection
  • PM2.5 detection
  • TVOC detection
  • British Dart electrochemical sensor
  • US TEMTOP laser particle sensor
  • Accurate and reliable data
Features
Read full description

Detection function: formaldehyde, PM2.5, TVOC It is equipped with British Dart formaldehyde electrochemical sensor, which effectively reduces gas interference and makes formaldehyde detection more accurate. Accurate and reliable data using the US TEMTOP laser particle sensor

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/

Screenshots

Temtop3 screens
Sensor Logger4 screens

Verdict

The call

The clearest difference is rating: Sensor Logger at 4.8 against Temtop's 2.9. Sensor Logger also leads on update cadence (weekly vs every 5 weeks) and review sentiment (44% vs 32%). Temtop's advantage is in-app purchases (none vs 6). On price, ratings volume, ads and device support 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

Both are free to download. Sensor Logger sells 6 in-app purchases, starting at $4.99 per month. Temtop asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Sensor Logger holds the better App Store score, 4.8 against 2.9. Both are backed by a comparable volume of ratings — 80 and 112 respectively. Written reviews point the same way: 32% of Temtop's written reviews are positive against 44% of Sensor Logger's.

UpkeepUpdate frequency

Temtop ships an update every 5 weeks, Sensor Logger weekly. The most recent releases landed on October 8, 2026 and October 10, 2026 respectively.

Scorecard5 real differences · 5 level
Temtop versus Sensor Logger: the parameters behind the verdict, then further details
ParameterTemtopSensor Logger
PriceFreeFree
Rating2.9 (80 ratings)4.8 (112 ratings) — better
Positive reviews32.2% of reviews44.4% of reviews — better
Number of ratings80112 — better
Update frequencyEvery 5 weeksWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, Apple Watch — better
Requires iOS15 — better16.4
Further details — not scored
Size183 MB81 MB
Age rating4+4+
DeveloperElitech Technology,Inc.Logger Labs LTD

Customer experience

Temtop

All ratings80 ratings
Positive41.3%
Neutral15.0%
Negative43.8%
Written reviews90 reviews
Positive32.2%
Neutral13.3%
Negative54.4%

Sensor Logger

All ratings112 ratings
Positive95.5%
Neutral2.7%
Negative1.8%
Written reviews9 reviews
Positive44.4%
Neutral22.2%
Negative33.3%

In-app purchases

None

Temtop

No 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

Questions

Is Temtop free?
Temtop is free to download, with no in-app purchases.
Is Sensor Logger free?
Sensor Logger is free to download, with in-app purchases available.
Which has better reviews, Temtop or Sensor Logger?
Sensor Logger is rated higher. Temtop averages 2.9 out of 5 from 80 ratings, while Sensor Logger averages 4.8 from 112 ratings.
Do Temtop or Sensor Logger have ads?
Neither Temtop nor Sensor Logger shows ads.
Which is updated more often, Temtop or Sensor Logger?
Temtop ships an update every 5 weeks, and Sensor Logger weekly. Most recently, Temtop was updated on October 8, 2026 and Sensor Logger on October 10, 2026.

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