# VarIoT vs TAS Viewer

The clearest difference is update cadence: TAS Viewer at every 2 months against VarIoT's every 71 months. TAS Viewer also leads on iOS requirement (14.0 vs 18.6). On price, in-app purchases, monetization model 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.

VarIoT ships an update every 71 months, TAS Viewer every 2 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | VarIoT | TAS Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/variot/id1463585141/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | Every 71 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 29 MB | 32 MB |
| Requires iOS | 18.6 | **14.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [American Thermal instruments, Inc.](https://appshunter.io/developer/1055795997) | [红杰 李](https://appshunter.io/developer/1602186097) |

## What reviewers say

### VarIoT

[App page](https://appshunter.io/ios/app/variot/id1463585141)

This app reads sensor data from a barcode, providing digital information about product details and temperature exposure. It offers customizable pass/fail options to ensure products remain within specified temperature ranges, streamlining quality inspection.

**Highlights:** Readable sensor indicator, Barcode data interpretation, Temperature threshold monitoring, Customizable pass/fail options, Digital record for quality inspection, Compliance with 8009 (01) standard

**In-app purchases:** none


### TAS Viewer

[App page](https://appshunter.io/ios/app/tas-viewer/id1605567151)

This application provides tools for the secondary analysis of infrared imaging data. It allows users to examine and interpret thermal images for various purposes.

**Highlights:** Infrared imaging secondary analysis, Thermal image interpretation, Data examination tools

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is VarIoT free?

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

### Is TAS Viewer free?

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

### Which is updated more often, VarIoT or TAS Viewer?

VarIoT ships an update every 71 months, and TAS Viewer every 2 months. Most recently, VarIoT was updated on November 3, 2026 and TAS Viewer on November 3, 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.*