# GKU Link vs ShuttR

The clearest difference is price: GKU Link at Free against ShuttR's $6.99. GKU Link also leads on iOS requirement (15 vs 17.0). ShuttR's advantage is in-app purchases (none vs 17). On update cadence, ads and device support there is nothing between them.

GKU Link is free to download; ShuttR costs $6.99 up front. GKU Link sells 17 one-off in-app purchases. ShuttR asks for nothing beyond the download.

GKU Link ships an update every 3 weeks, ShuttR every 2 weeks. The most recent releases landed on October 25, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | GKU Link | ShuttR |
| --- | --- | --- |
| Price | **Free** | $6.99 |
| Rating | — | **[4.5 (2 ratings)](https://appshunter.io/ios/app/shuttr-shutter-speed-tester/id6790870659/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | — | Paid |
| Size | 39 MB | 7 MB |
| Requires iOS | **15** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Gkuvision Technology Co., Ltd.](https://appshunter.io/developer/992915280) | [Christian Haemmerle](https://appshunter.io/developer/6790870661) |

## What reviewers say

### GKU Link

[App page](https://appshunter.io/ios/app/gku-link/id6499292768)

**Features:** macOS Compatibility

**In-app purchases (17)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1-Month Loop Event Cloud Storage | $1.99 | one-time |
| Cloud 30-Day & 7-Day Event | $1.99 | one-time |
| 1-Month Loop Event Cloud Storage | $3.99 | one-time |
| Cloud 30-Day & 30-Day Event | $3.99 | one-time |
| Cloud 90-Day & 7-Day Event | $5.79 | one-time |
| 6-Month Loop Event Cloud Storage | $10.99 | one-time |
| Cloud 90-Day & 30-Day Event | $10.99 | one-time |
| Cloud 180-Day & 7-Day Event | $10.99 | one-time |
| 4G 30-Day Max US | $15.99 | one-time |
| 6-Month Loop Event Cloud Storage | $20.99 | one-time |
| Cloud 180-Day & 30-Day Event | $20.99 | one-time |
| 12-Month Loop Event Cloud Storage | $22.99 | one-time |
| 12-Month Loop Event Cloud Storage | $35.99 | one-time |
| Cloud 365-Day & 30-Day Event | $39.99 | one-time |
| 4G 180-Day Max US | $89.99 | one-time |
| Unlimited Data 12-M LoopEventCloud | $163.99 | one-time |
| 4G_360D_Max_US | $169.99 | one-time |


### ShuttR

[App page](https://appshunter.io/ios/app/shuttr-shutter-speed-tester/id6790870659)

This app uses your iPhone's camera to accurately measure the shutter speeds of analog film cameras. It provides a guided process to check if your camera's shutter has drifted over time, offering a clear verdict on its performance without requiring external hardware.

**Highlights:** Measures real shutter speeds, Uses iPhone camera and light source, Tests speeds from 8s to 1/500, Guided step-by-step protocol, Automatic calibration, Deviation in stops and verdict, History and camera collection, Shareable 'shutter checked' certificate

**In-app purchases:** none


## Frequently asked questions

### Is GKU Link free?

GKU Link is free to download, with in-app purchases available.

### Is ShuttR free?

ShuttR costs $6.99, with no in-app purchases.

### Do GKU Link or ShuttR have ads?

Neither GKU Link nor ShuttR shows ads.

### Which is updated more often, GKU Link or ShuttR?

GKU Link ships an update every 3 weeks, and ShuttR every 2 weeks. Most recently, GKU Link was updated on October 25, 2026 and ShuttR on October 29, 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.*