# Equation = vs Rail Shuffle 2

The clearest difference is ads: Rail Shuffle 2 at none against Equation ='s shown. On price, update cadence, 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.

Equation = ships an update every 5 months, Rail Shuffle 2 every 9 months. The most recent releases landed on October 6, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Equation = | Rail Shuffle 2 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 5 months** | Every 9 months |
| Size | 91 MB | 57 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Beijing Ningdom Technology Co., Ltd.](https://appshunter.io/developer/434217018) | [Eweguo AB](https://appshunter.io/developer/305628259) |

## What reviewers say

### Equation =

[App page](https://appshunter.io/ios/app/equation/id6737338940)

**In-app purchases:** none


### Rail Shuffle 2

[App page](https://appshunter.io/ios/app/rail-shuffle-2/id6741868611)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Equation = free?

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

### Is Rail Shuffle 2 free?

Rail Shuffle 2 is free to download, with no in-app purchases.

### Do Equation = or Rail Shuffle 2 have ads?

Equation = shows ads; Rail Shuffle 2 does not.

### Which is updated more often, Equation = or Rail Shuffle 2?

Equation = ships an update every 5 months, and Rail Shuffle 2 every 9 months. Most recently, Equation = was updated on October 6, 2026 and Rail Shuffle 2 on October 3, 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.*