# Sliding Rails vs Numera

The clearest difference is price: Numera at Free against Sliding Rails's $1.69. Sliding Rails's advantage is ads (none vs shown). On update cadence, in-app purchases, device support and iOS requirement there is nothing between them.

Numera is free to download; Sliding Rails costs $1.69 up front. Sliding Rails sells 1 one-off in-app purchase and Numera sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Sliding Rails ships an update every 5 days, Numera every 6 days. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Sliding Rails | Numera |
| --- | --- | --- |
| Price | $1.69 | **Free** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 5 days** | Every 6 days |
| Size | 100 MB | 261 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jun Hotta](https://appshunter.io/developer/1376632721) | [Metric Studio Inc.](https://appshunter.io/developer/1618098746) |

## What reviewers say

### Sliding Rails

[App page](https://appshunter.io/ios/app/sliding-rails/id1525397313)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stop Card x30 | $2.99 | one-time |


### Numera

[App page](https://appshunter.io/ios/app/numera-math-puzzle-game/id6670555101)

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 10 key items | $0.49 | one-time |
| 10 Skip Items | $0.49 | one-time |
| 20 key items | $0.99 | one-time |
| 30 key items | $1.99 | one-time |
| 30 skip items | $1.99 | one-time |
| Remove Ads | $2.99 | one-time |
| 50 hint items | $2.99 | one-time |
| 50 skip items | $2.99 | one-time |
| 80 skip items | $4.99 | one-time |
| 100 skip items | $6.99 | one-time |


## Frequently asked questions

### Is Sliding Rails free?

Sliding Rails costs $1.69, and also offers in-app purchases.

### Is Numera free?

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

### Do Sliding Rails or Numera have ads?

Numera shows ads; Sliding Rails does not.

### Which is updated more often, Sliding Rails or Numera?

Sliding Rails ships an update every 5 days, and Numera every 6 days. Most recently, Sliding Rails was updated on October 29, 2026 and Numera on October 25, 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.*