# Developing Sentence Strips vs book4kids

The clearest difference is in-app purchases: Developing Sentence Strips at none against book4kids's 2. Developing Sentence Strips also leads on iOS requirement (10.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. book4kids sells 2 in-app purchases, starting at $0.49 per month. Developing Sentence Strips asks for nothing beyond the download.

Developing Sentence Strips ships an update fortnightly, book4kids every 3 weeks. The most recent releases landed on October 3, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Developing Sentence Strips | book4kids |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Size | 30 MB | 20 MB |
| Requires iOS | **10.0** | 17.0 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Classroom Focused Software](https://appshunter.io/developer/406741679) | [Benjamin TATI](https://appshunter.io/developer/1583386758) |

## What reviewers say

### Developing Sentence Strips

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

**Features:** macOS Compatibility

**In-app purchases:** none


### book4kids

[App page](https://appshunter.io/ios/app/book4kids/id1587601959)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Book4kids monthly subscription | $0.49 | per month |
| Book4kids annual subscription | $1.00 | per year |


## Frequently asked questions

### Is Developing Sentence Strips free?

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

### Is book4kids free?

book4kids is free to download, with in-app purchases available.

### Do Developing Sentence Strips or book4kids have ads?

Neither Developing Sentence Strips nor book4kids shows ads.

### Which is updated more often, Developing Sentence Strips or book4kids?

Developing Sentence Strips ships an update fortnightly, and book4kids every 3 weeks. Most recently, Developing Sentence Strips was updated on October 3, 2026 and book4kids on October 1, 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.*