# Addition Skill Builders vs SCS

The clearest difference is price: SCS at Free against Addition Skill Builders's $2.99. SCS also leads on update cadence (every 3 months vs every 28 months). Addition Skill Builders's advantage is iOS requirement (12.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

SCS is free to download; Addition Skill Builders costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Addition Skill Builders ships an update every 28 months, SCS every 3 months. The most recent releases landed on October 31, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Addition Skill Builders | SCS |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 28 months | **Every 3 months** |
| Size | 19 MB | 28 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sergey Malugin](https://appshunter.io/developer/562782409) | [Davy Raitt](https://appshunter.io/developer/1795318281) |

## What reviewers say

### Addition Skill Builders

[App page](https://appshunter.io/ios/app/addition-skill-builders/id1271517256)

**Features:** macOS Compatibility

**In-app purchases:** none


### SCS

[App page](https://appshunter.io/ios/app/scs-c03-aws-security-spec/id6756562582)

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

**In-app purchases:** none


## Frequently asked questions

### Is Addition Skill Builders free?

Addition Skill Builders costs $2.99, with no in-app purchases.

### Is SCS free?

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

### Do Addition Skill Builders or SCS have ads?

Neither Addition Skill Builders nor SCS shows ads.

### Which is updated more often, Addition Skill Builders or SCS?

Addition Skill Builders ships an update every 28 months, and SCS every 3 months. Most recently, Addition Skill Builders was updated on October 31, 2026 and SCS 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.*