# How {Things} Work vs SJ Academy

How {Things} Work and SJ Academy are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | How {Things} Work | SJ Academy |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Fortnightly |
| Size | 41 MB | 62 MB |
| Requires iOS | **15.1** | 15.5 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ccburns.me](https://appshunter.io/developer/444074938) | [Ryan Tan](https://appshunter.io/developer/6785959048) |

## What reviewers say

### How {Things} Work

[App page](https://appshunter.io/ios/app/how-things-work/id6767944916)

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

**In-app purchases:** none


### SJ Academy

[App page](https://appshunter.io/ios/app/sj-academy/id6785959046)

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

**In-app purchases:** none


## Frequently asked questions

### Is How {Things} Work free?

How {Things} Work is free to download, with no in-app purchases.

### Is SJ Academy free?

SJ Academy is free to download, with no in-app purchases.

### Do How {Things} Work or SJ Academy have ads?

Neither How {Things} Work nor SJ Academy shows ads.

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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.*