# TRWViewer vs Thermo Log

The clearest difference is update cadence: TRWViewer at every 3 weeks against Thermo Log's every 5 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

TRWViewer ships an update every 3 weeks, Thermo Log every 5 months. The most recent releases landed on September 16, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | TRWViewer | Thermo Log |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 months |
| Size | 14 MB | 10 MB |
| Requires iOS | 12.2 | **11.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [東邦電子株式会社](https://appshunter.io/developer/1401890483) | [A&D Company, Limited](https://appshunter.io/developer/894522769) |

## What reviewers say

### TRWViewer

[App page](https://appshunter.io/ios/app/trwviewer/id1401890484)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Thermo Log

[App page](https://appshunter.io/ios/app/thermo-log/id1540705486)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TRWViewer free?

TRWViewer is free to download, with no in-app purchases.

### Is Thermo Log free?

Thermo Log is free to download, with no in-app purchases.

### Do TRWViewer or Thermo Log have ads?

Neither TRWViewer nor Thermo Log shows ads.

### Which is updated more often, TRWViewer or Thermo Log?

TRWViewer ships an update every 3 weeks, and Thermo Log every 5 months. Most recently, TRWViewer was updated on September 16, 2026 and Thermo Log on September 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.*