# InfiRayOutdoor2 vs ZSYNC

The clearest difference is review sentiment: ZSYNC at 100% against InfiRayOutdoor2's 0%. ZSYNC also leads on rating (5.0 vs 1.6). InfiRayOutdoor2's advantage is ratings volume (25 vs 4) and iOS requirement (13.0 vs 17.0). 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.

ZSYNC holds the better App Store score, 5.0 against 1.6. That said, the two scores are not equally well evidenced: InfiRayOutdoor2 has 25 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 0% of InfiRayOutdoor2's written reviews are positive against 100% of ZSYNC's.

InfiRayOutdoor2 ships an update every 3 weeks, ZSYNC every 2 weeks. The most recent releases landed on October 24, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | InfiRayOutdoor2 | ZSYNC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.6 (25 ratings)](https://appshunter.io/ios/app/infirayoutdoor2/id6473877685/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/zsync/id6740468870/reviews)** |
| Number of ratings | **25** | 4 |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 61 MB | 91 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [InfiRay Technologies Co.,Ltd.](https://appshunter.io/developer/1516230719) | [Zentron LLC](https://appshunter.io/developer/1790119047) |

## What reviewers say

### InfiRayOutdoor2

[App page](https://appshunter.io/ios/app/infirayoutdoor2/id6473877685)

Enhance your thermal imaging experience with this app. It offers real-time image transmission, file management, firmware updates, and video editing capabilities. Enjoy improved observation with dual day/night modes and customizable reticles.

**Highlights:** Real-time image transmission, Device photo/video file management, Device firmware upgrades, Device parameter settings, Video editing, Custom reticle

**Features:** macOS Compatibility

**In-app purchases:** none


### ZSYNC

[App page](https://appshunter.io/ios/app/zsync/id6740468870)

Easily connect devices to manage files, share screens in real-time, and remotely control other products. This user-centric app offers a clean interface to boost productivity and manage devices with ease.

**Highlights:** Efficient file management, High-resolution photo/video download, Real-time screen sharing, Remote control functionality, User-centric interface, Boost productivity

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

**In-app purchases:** none


## Frequently asked questions

### Is InfiRayOutdoor2 free?

InfiRayOutdoor2 is free to download, with no in-app purchases.

### Is ZSYNC free?

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

### Which has better reviews, InfiRayOutdoor2 or ZSYNC?

ZSYNC is rated higher. InfiRayOutdoor2 averages 1.6 out of 5 from 25 ratings, while ZSYNC averages 5.0 from 4 ratings.

### Do InfiRayOutdoor2 or ZSYNC have ads?

Neither InfiRayOutdoor2 nor ZSYNC shows ads.

### Which is updated more often, InfiRayOutdoor2 or ZSYNC?

InfiRayOutdoor2 ships an update every 3 weeks, and ZSYNC every 2 weeks. Most recently, InfiRayOutdoor2 was updated on October 24, 2026 and ZSYNC on October 6, 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.*