# Digraphs CH SH vs GradeKey

The clearest difference is price: GradeKey at Free against Digraphs CH SH's $3.99. GradeKey also leads on update cadence (fortnightly vs every 5 months). Digraphs CH SH's advantage is in-app purchases (none vs 1) and device support (4 vs 2). On ads there is nothing between them.

GradeKey is free to download; Digraphs CH SH costs $3.99 up front. GradeKey sells 1 one-off in-app purchase. Digraphs CH SH asks for nothing beyond the download.

Digraphs CH SH ships an update every 5 months, GradeKey fortnightly. The most recent releases landed on September 14, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Digraphs CH SH | GradeKey |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Fortnightly** |
| Size | 238 MB | 5 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Rafal Sadowski](https://appshunter.io/developer/1561531786) | [Hernan Rosario](https://appshunter.io/developer/6791755727) |

## What reviewers say

### Digraphs CH SH

[App page](https://appshunter.io/ios/app/digraphs-ch-sh/id1668786654)

**In-app purchases:** none


### GradeKey

[App page](https://appshunter.io/ios/app/gradekey-grade-calculator/id6794347301)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| GradeKey Pro | $7.99 | one-time |


## Frequently asked questions

### Is Digraphs CH SH free?

Digraphs CH SH costs $3.99, with no in-app purchases.

### Is GradeKey free?

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

### Do Digraphs CH SH or GradeKey have ads?

Neither Digraphs CH SH nor GradeKey shows ads.

### Which is updated more often, Digraphs CH SH or GradeKey?

Digraphs CH SH ships an update every 5 months, and GradeKey fortnightly. Most recently, Digraphs CH SH was updated on September 14, 2026 and GradeKey on September 25, 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.*