# Temtop vs Sensor Logger

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.

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.

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.

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

## The numbers

| Metric | Temtop | Sensor Logger |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.9 (80 ratings)](https://appshunter.io/ios/app/temtop/id1439409326/reviews) | **[4.8 (112 ratings)](https://appshunter.io/ios/app/sensor-logger/id1531582925/reviews)** |
| Number of ratings | 80 | **112** |
| Positive reviews | 32.2% of reviews | **44.4% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 183 MB | 81 MB |
| Requires iOS | **15** | 16.4 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Elitech Technology,Inc.](https://appshunter.io/developer/1455057713) | [Logger Labs LTD](https://appshunter.io/developer/1531583287) |

## What reviewers say

### Temtop

[App page](https://appshunter.io/ios/app/temtop/id1439409326)

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:** Vision Pro support

**In-app purchases:** none


### Sensor Logger

[App page](https://appshunter.io/ios/app/sensor-logger/id1531582925)

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:** Apple Watch app, Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus Monthly | $4.99 | per month |
| Pro Monthly | $9.99 | per month |
| Ultimate Monthly | $24.99 | per month |
| Plus Yearly | $49.99 | per year |
| Pro Yearly | $99.99 | per year |
| Ultimate Yearly | $249.99 | per year |


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*