# Developing Sentence Strips vs Keyword Vocabulary

The clearest difference is price: Developing Sentence Strips at Free against Keyword Vocabulary's $0.99. Developing Sentence Strips also leads on iOS requirement (10.0 vs 15.6). Keyword Vocabulary's advantage is device support (3 vs 1). On update cadence, ads and in-app purchases there is nothing between them.

Developing Sentence Strips is free to download; Keyword Vocabulary costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Developing Sentence Strips ships an update fortnightly, Keyword Vocabulary every 3 weeks. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Developing Sentence Strips | Keyword Vocabulary |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Size | 30 MB | 51 MB |
| Requires iOS | **10.0** | 15.6 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Classroom Focused Software](https://appshunter.io/developer/406741679) | [Bergmann Gudmundsson](https://appshunter.io/developer/1725487816) |

## What reviewers say

### Developing Sentence Strips

[App page](https://appshunter.io/ios/app/developing-sentence-strips/id1439630082)

**Features:** macOS Compatibility

**In-app purchases:** none


### Keyword Vocabulary

[App page](https://appshunter.io/ios/app/keyword-vocabulary/id6478088254)

**In-app purchases:** none


## Frequently asked questions

### Is Developing Sentence Strips free?

Developing Sentence Strips is free to download, with no in-app purchases.

### Is Keyword Vocabulary free?

Keyword Vocabulary costs $0.99, with no in-app purchases.

### Do Developing Sentence Strips or Keyword Vocabulary have ads?

Neither Developing Sentence Strips nor Keyword Vocabulary shows ads.

### Which is updated more often, Developing Sentence Strips or Keyword Vocabulary?

Developing Sentence Strips ships an update fortnightly, and Keyword Vocabulary every 3 weeks. Most recently, Developing Sentence Strips was updated on October 26, 2026 and Keyword Vocabulary on October 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.*