# Random Number 99 vs ZeroOneFlow

The clearest difference is price: ZeroOneFlow at Free against Random Number 99's $2.99. ZeroOneFlow also leads on update cadence (every 3 weeks vs every 40 months). Random Number 99's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.

ZeroOneFlow is free to download; Random Number 99 costs $2.99 up front. ZeroOneFlow sells 1 one-off in-app purchase. Random Number 99 asks for nothing beyond the download.

Random Number 99 ships an update every 40 months, ZeroOneFlow every 3 weeks. The most recent releases landed on October 4, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Random Number 99 | ZeroOneFlow |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 40 months | **Every 3 weeks** |
| Size | 24 MB | 1 MB |
| Requires iOS | **15.1** | 16.2 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [浩保 Chiba](https://appshunter.io/developer/303198553) | [Fu Ni](https://appshunter.io/developer/1560534229) |

## What reviewers say

### Random Number 99

[App page](https://appshunter.io/ios/app/random-number-99/id537829584)

**In-app purchases:** none


### ZeroOneFlow

[App page](https://appshunter.io/ios/app/zerooneflow/id1563516711)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tornado | $0.99 | one-time |


## Frequently asked questions

### Is Random Number 99 free?

Random Number 99 costs $2.99, with no in-app purchases.

### Is ZeroOneFlow free?

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

### Do Random Number 99 or ZeroOneFlow have ads?

Neither Random Number 99 nor ZeroOneFlow shows ads.

### Which is updated more often, Random Number 99 or ZeroOneFlow?

Random Number 99 ships an update every 40 months, and ZeroOneFlow every 3 weeks. Most recently, Random Number 99 was updated on October 4, 2026 and ZeroOneFlow on October 7, 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.*