# X vs CHASING GO2

The clearest difference is review sentiment: X at 76% against CHASING GO2's 5%. X also leads on rating (4.8 vs 2.3). CHASING GO2's advantage is monetization model (free vs paid) and update cadence (every 3 months vs every 13 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.

X holds the better App Store score, 4.8 against 2.3. Both are backed by a comparable volume of ratings — 8 and 24 respectively. Written reviews point the same way: 76% of X's written reviews are positive against 5% of CHASING GO2's.

X ships an update every 13 months, CHASING GO2 every 3 months. The most recent releases landed on September 29, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | X | CHASING GO2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (8 ratings)](https://appshunter.io/ios/app/x-ray-timer/id350390647/reviews)** | [2.3 (24 ratings)](https://appshunter.io/ios/app/chasing-go2/id1478859641/reviews) |
| Number of ratings | 8 | **24** |
| Positive reviews | **75.8% of reviews** | 5.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 3 months** |
| Monetization | Paid | **Free** |
| Size | 0 MB | 130 MB |
| Requires iOS | **8.0** | 9.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Lance Henderson](https://appshunter.io/developer/348247919) | [Chasing-Innovation Technology Co., LTD.](https://appshunter.io/developer/1249652722) |

## What reviewers say

### X

[App page](https://appshunter.io/ios/app/x-ray-timer/id350390647)

Calculate radiography shot times for industrial radiographers using radioactive materials. Quickly determine exposure time by inputting curies, steel thickness, and source-to-film distance.

**Highlights:** Calculate radiography shot times, Supports Iridium and Cobalt sources, Input curies, thickness, and distance, Field-tested for accuracy, Replaces slide rule calculations

**Features:** macOS Compatibility

**In-app purchases:** none


### CHASING GO2

[App page](https://appshunter.io/ios/app/chasing-go2/id1478859641)

Capture and share underwater moments with real-time image transmission and live streaming. Edit and enjoy your underwater photos and videos with this companion app.

**Highlights:** Real-time image transmission, Live streaming, Photo and video editing, Sharing capabilities, Supports CHASING F1 and DORY products

**In-app purchases:** none


## Frequently asked questions

### Is X free?

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

### Is CHASING GO2 free?

CHASING GO2 is free to download, with no in-app purchases.

### Which has better reviews, X or CHASING GO2?

X is rated higher. X averages 4.8 out of 5 from 8 ratings, while CHASING GO2 averages 2.3 from 24 ratings.

### Do X or CHASING GO2 have ads?

Neither X nor CHASING GO2 shows ads.

### Which is updated more often, X or CHASING GO2?

X ships an update every 13 months, and CHASING GO2 every 3 months. Most recently, X was updated on September 29, 2026 and CHASING GO2 on September 23, 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.*