# Knox ESC vs McGraw CSD

Knox ESC and McGraw CSD are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases 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.

Knox ESC ships an update every 2 months, McGraw CSD every 3 months. The most recent releases landed on October 25, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Knox ESC | McGraw CSD |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Size | 112 MB | 143 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Knox ESC](https://appshunter.io/developer/1721601388) | [McGraw Central School District](https://appshunter.io/developer/1739400989) |

## What reviewers say

### Knox ESC

[App page](https://appshunter.io/ios/app/knox-esc/id6474450391)

**In-app purchases:** none


### McGraw CSD

[App page](https://appshunter.io/ios/app/mcgraw-csd/id6480526391)

**In-app purchases:** none


## Frequently asked questions

### Is Knox ESC free?

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

### Is McGraw CSD free?

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

### Do Knox ESC or McGraw CSD have ads?

Neither Knox ESC nor McGraw CSD shows ads.

### Which is updated more often, Knox ESC or McGraw CSD?

Knox ESC ships an update every 2 months, and McGraw CSD every 3 months. Most recently, Knox ESC was updated on October 25, 2026 and McGraw CSD on October 27, 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.*