# Fact Fluency vs One Inch Boy

The clearest difference is price: One Inch Boy at $0.99 against Fact Fluency's $1.99. Fact Fluency's advantage is iOS requirement (15.1 vs 18.2). On ads, in-app purchases and device support there is nothing between them.

Fact Fluency costs $1.99 and One Inch Boy $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Fact Fluency | One Inch Boy |
| --- | --- | --- |
| Price | $1.99 | **$0.99** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 6 weeks |
| Size | 17 MB | 219 MB |
| Requires iOS | **15.1** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Step Up Learning Labs](https://appshunter.io/developer/1803446550) | [Jeffrey Dick](https://appshunter.io/developer/821338172) |

## What reviewers say

### Fact Fluency

[App page](https://appshunter.io/ios/app/fact-fluency-mental-math/id6743555303)

**Features:** macOS Compatibility

**In-app purchases:** none


### One Inch Boy

[App page](https://appshunter.io/ios/app/one-inch-boy/id6744957191)

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

**In-app purchases:** none


## Frequently asked questions

### Is Fact Fluency free?

Fact Fluency costs $1.99, with no in-app purchases.

### Is One Inch Boy free?

One Inch Boy costs $0.99, with no in-app purchases.

### Do Fact Fluency or One Inch Boy have ads?

Neither Fact Fluency nor One Inch Boy shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*