# M-Logger Server — Software to use a PMV sensor

> Software to use a PMV sensor (iPhone/iPad app by Eisuke Togashi.)

- Source: https://appshunter.io/ios/app/m-logger-server/id1599907037 (this page in markdown: same URL + `.md`)
- Developer: [Eisuke Togashi](https://appshunter.io/developer/592398746)
- Category: Education, Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 15.0 · 72 MB
- Released: 2021-12-13
- Data updated: 2026-08-24
- User reviews in markdown: https://appshunter.io/ios/app/m-logger-server/id1599907037/reviews.md

## What is M?

This is the software for using the thermal environment measurement device MLogger.


## Version history (last 5 releases)

### 1.3.6 — 2026-08-21

Improved measurement data download.

1. Significantly improved download reliability
2. On communication errors, only the missing part is automatically re-downloaded instead of restarting from the beginning

### 1.3.5 — 2026-08-17

Fixed an issue where measurement settings could not be sent to devices without a CO2 sensor.

### 1.3.4 — 2026-08-13

Globe temperature is now recorded with the same precision as dry-bulb temperature (one decimal place)
Fixed a failure when sharing large data files from the file list
Fixed iOS-specific issues: swipe action icon color, Cancel not working in input dialogs, and inability to enter negative values (e.g., correction coefficients)
Added validation for measurement interval inputs
Comfort indices (PMV, etc.) now show "—" instead of values based on assumed defaults when sensors are not connected
Extended input ranges in the thermal comfort calculator (temperature 0–50 °C, air velocity 0–5 m/s)

### 1.3.3 — 2026-08-10

The device settings screen now shows the ID of the connected air-velocity probe
Tap "Device ID" or "Velocity probe ID" to open the factory inspection report and the anemometer calibration report of that unit on the web (mlogger.jp)

Note: ID display and report links are available when connected to an M-Logger running firmware 4.0.0 or later.

### 1.3.2 — 2026-06-04

- Added battery life estimation (remaining days of operation)
- Warmup and sensor disconnection are now shown as warning banners
- Measurement settings reorganized into 3 groups for clarity
- Internal memory data download now works over BLE
- Improved connection stability

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## More apps by Eisuke Togashi

- [E-Sensor](https://appshunter.io/ios/app/e-sensor/id6760690492)

All apps by Eisuke Togashi: https://appshunter.io/developer/592398746

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-24.*