# Rail Shuffle vs 6 Differences

Rail Shuffle and 6 Differences are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Rail Shuffle ships an update every 41 months, 6 Differences every 43 months. The most recent releases landed on March 12, 2026 and August 23, 2026 respectively.

## The numbers

| Metric | Rail Shuffle | 6 Differences |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 41 months** | Every 43 months |
| Size | 11 MB | 131 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Eweguo AB](https://appshunter.io/developer/305628259) | [Hieu Hoang](https://appshunter.io/developer/1108291419) |

## What reviewers say

### Rail Shuffle

[App page](https://appshunter.io/ios/app/rail-shuffle/id517793019)

**Features:** macOS Compatibility

**In-app purchases:** none


### 6 Differences

[App page](https://appshunter.io/ios/app/6-differences-spot-them/id1628381817)

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

**In-app purchases:** none


## Frequently asked questions

### Is Rail Shuffle free?

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

### Is 6 Differences free?

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

### Do Rail Shuffle or 6 Differences have ads?

Neither Rail Shuffle nor 6 Differences shows ads.

### Which is updated more often, Rail Shuffle or 6 Differences?

Rail Shuffle ships an update every 41 months, and 6 Differences every 43 months. Most recently, Rail Shuffle was updated on March 12, 2026 and 6 Differences on August 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.*