# I vs TAS Viewer

The clearest difference is update cadence: TAS Viewer at every 2 months against I's every 4 months. I's advantage is iOS requirement (8.0 vs 14.0). 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.

I ships an update every 4 months, TAS Viewer every 2 months. The most recent releases landed on October 6, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | I | TAS Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | — | Free |
| Size | 11 MB | 32 MB |
| Requires iOS | **8.0** | 14.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Spetrotec LTD](https://appshunter.io/developer/660726738) | [红杰 李](https://appshunter.io/developer/1602186097) |

## What reviewers say

### I

[App page](https://appshunter.io/ios/app/i-watcher/id660726735)

**Features:** macOS Compatibility

**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 I free?

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

### Is TAS Viewer free?

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

### Do I or TAS Viewer have ads?

Neither I nor TAS Viewer shows ads.

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

I ships an update every 4 months, and TAS Viewer every 2 months. Most recently, I was updated on October 6, 2026 and TAS Viewer on September 15, 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.*