# Ontrasys Lite vs Thermo Log

The clearest difference is iOS requirement: Thermo Log at 11.0 against Ontrasys Lite's 13.6. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Ontrasys Lite ships an update every 4 months, Thermo Log every 5 months. The most recent releases landed on July 17, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Ontrasys Lite | Thermo Log |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 5 months |
| Size | 13 MB | 10 MB |
| Requires iOS | 13.6 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TOPPAN PRINTING CO.,LTD.](https://appshunter.io/developer/373909233) | [A&D Company, Limited](https://appshunter.io/developer/894522769) |

## What reviewers say

### Ontrasys Lite

[App page](https://appshunter.io/ios/app/ontrasys-lite/id1297899857)

**Features:** macOS Compatibility

**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 Ontrasys Lite free?

Ontrasys Lite 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 Ontrasys Lite or Thermo Log have ads?

Neither Ontrasys Lite nor Thermo Log shows ads.

### Which is updated more often, Ontrasys Lite or Thermo Log?

Ontrasys Lite ships an update every 4 months, and Thermo Log every 5 months. Most recently, Ontrasys Lite was updated on July 17, 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.*