# Simplex Spelling HD vs Cardiff Castle BSL

The clearest difference is price: Cardiff Castle BSL at Free against Simplex Spelling HD's $4.99. Cardiff Castle BSL also leads on iOS requirement (11 vs 15.0). Simplex Spelling HD's advantage is update cadence (every 3 months vs every 26 months). On ads, in-app purchases and device support there is nothing between them.

Cardiff Castle BSL is free to download; Simplex Spelling HD costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Simplex Spelling HD ships an update every 3 months, Cardiff Castle BSL every 26 months. The most recent releases landed on October 22, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Simplex Spelling HD | Cardiff Castle BSL |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[3.2 (5 ratings)](https://appshunter.io/ios/app/simplex-spelling-hd/id456744012/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 90.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 26 months |
| Monetization | Paid | — |
| Size | 134 MB | 77 MB |
| Requires iOS | 15.0 | **11** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pyxwise Software Inc.](https://appshunter.io/developer/456744015) | [Cyngor Caerdydd Cardiff Council](https://appshunter.io/developer/1299616865) |

## What reviewers say

### Simplex Spelling HD

[App page](https://appshunter.io/ios/app/simplex-spelling-hd/id456744012)

This app enhances English spelling and reading skills using a unique "reverse phonics" approach and contextually relevant spelling rules. It acts as a personal spelling coach, teaching foundational Dolch sight words through interactive word building and immediate feedback.

**Highlights:** Teaches Dolch Sight words, Reverse phonics approach, Contextual spelling rules, Interactive word building, Phonics hint feature, Letter-by-letter feedback, Multiple user accounts

**Features:** macOS Compatibility

**In-app purchases:** none


### Cardiff Castle BSL

[App page](https://appshunter.io/ios/app/cardiff-castle-bsl/id889944973)

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

**In-app purchases:** none


## Frequently asked questions

### Is Simplex Spelling HD free?

Simplex Spelling HD costs $4.99, with no in-app purchases.

### Is Cardiff Castle BSL free?

Cardiff Castle BSL is free to download, with no in-app purchases.

### Do Simplex Spelling HD or Cardiff Castle BSL have ads?

Neither Simplex Spelling HD nor Cardiff Castle BSL shows ads.

### Which is updated more often, Simplex Spelling HD or Cardiff Castle BSL?

Simplex Spelling HD ships an update every 3 months, and Cardiff Castle BSL every 26 months. Most recently, Simplex Spelling HD was updated on October 22, 2026 and Cardiff Castle BSL on October 26, 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.*