# Oz Phonics 4 vs Comprehension Builder.

The clearest difference is price: Comprehension Builder. at Free against Oz Phonics 4's $2.99. Comprehension Builder. also leads on device support (3 vs 1) and iOS requirement (12.2 vs 16.0). Oz Phonics 4's advantage is in-app purchases (none vs 3). On update cadence and ads there is nothing between them.

Comprehension Builder. is free to download; Oz Phonics 4 costs $2.99 up front. Comprehension Builder. sells 3 one-off in-app purchases. Oz Phonics 4 asks for nothing beyond the download.

Oz Phonics 4 ships an update every 27 months, Comprehension Builder. every 47 months. The most recent releases landed on October 9, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Oz Phonics 4 | Comprehension Builder. |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[2.0 (2 ratings)](https://appshunter.io/ios/app/comprehension-builder/id1238808362/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 27 months** | Every 47 months |
| Monetization | — | Free with in-app purchases |
| Size | 47 MB | 50 MB |
| Requires iOS | 16.0 | **12.2** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [DSP Learning Pty Ltd](https://appshunter.io/developer/556500951) | [Janine Toole](https://appshunter.io/developer/839832427) |

## What reviewers say

### Oz Phonics 4

[App page](https://appshunter.io/ios/app/oz-phonics-4/id1063170939)

**Features:** macOS Compatibility

**In-app purchases:** none


### Comprehension Builder.

[App page](https://appshunter.io/ios/app/comprehension-builder/id1238808362)

This app helps users improve reading comprehension, working memory, and the ability to answer questions about text. It features incremental learning with texts that increase in length and difficulty as skills develop, along with a reward system for motivation. Designed for learners of all ages, including those with special needs or learning English.

**Highlights:** Passage comprehension practice, Working memory development, Answering multiple-choice questions, Incremental learning levels, Reward Center for motivation, 200+ fiction and non-fiction texts, Content designed by teachers

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Two Users | $1.99 | one-time |
| All Levels | $3.99 | one-time |
| 10 Users | $3.99 | one-time |


## Frequently asked questions

### Is Oz Phonics 4 free?

Oz Phonics 4 costs $2.99, with no in-app purchases.

### Is Comprehension Builder. free?

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

### Do Oz Phonics 4 or Comprehension Builder. have ads?

Neither Oz Phonics 4 nor Comprehension Builder. shows ads.

### Which is updated more often, Oz Phonics 4 or Comprehension Builder.?

Oz Phonics 4 ships an update every 27 months, and Comprehension Builder. every 47 months. Most recently, Oz Phonics 4 was updated on October 9, 2026 and Comprehension Builder. on October 14, 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.*