# (AR) Number Line vs RIKU

The clearest difference is price: RIKU at Free against (AR) Number Line's $0.99. RIKU also leads on update cadence (fortnightly vs every 5 months). (AR) Number Line's advantage is in-app purchases (none vs 2). On ads, device support and iOS requirement there is nothing between them.

RIKU is free to download; (AR) Number Line costs $0.99 up front. RIKU sells 2 in-app purchases, starting at $1.99 per month. (AR) Number Line asks for nothing beyond the download.

(AR) Number Line ships an update every 5 months, RIKU fortnightly. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | (AR) Number Line | RIKU |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/ar-number-line/id6473689075/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Fortnightly** |
| Size | 96 MB | 35 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 9+ |
| Developer | [Christian Urff](https://appshunter.io/developer/415894463) | [Martin Klaus](https://appshunter.io/developer/1895660348) |

## What reviewers say

### (AR) Number Line

[App page](https://appshunter.io/ios/app/ar-number-line/id6473689075)

**Features:** Vision Pro support

**In-app purchases:** none


### RIKU

[App page](https://appshunter.io/ios/app/riku/id6764147753)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Riku Premium monatlich | $1.99 | per month |
| Riku Premium jährlich | $12.99 | per year |


## Frequently asked questions

### Is (AR) Number Line free?

(AR) Number Line costs $0.99, with no in-app purchases.

### Is RIKU free?

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

### Do (AR) Number Line or RIKU have ads?

Neither (AR) Number Line nor RIKU shows ads.

### Which is updated more often, (AR) Number Line or RIKU?

(AR) Number Line ships an update every 5 months, and RIKU fortnightly. Most recently, (AR) Number Line was updated on October 25, 2026 and RIKU on October 28, 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.*