# Keyword Understanding vs Comprehension Builder

The clearest difference is price: Comprehension Builder at $7.99 against Keyword Understanding's $17.99. Comprehension Builder also leads on iOS requirement (12.2 vs 15.0). Keyword Understanding's advantage is update cadence (every 10 months vs every 40 months). On ads, in-app purchases and device support there is nothing between them.

Keyword Understanding costs $17.99 and Comprehension Builder $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Keyword Understanding ships an update every 10 months, Comprehension Builder every 40 months. The most recent releases landed on September 3, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Keyword Understanding | Comprehension Builder |
| --- | --- | --- |
| Price | $17.99 | **$7.99** |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/keyword-understanding/id816979055/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 months** | Every 40 months |
| Monetization | Paid | — |
| Size | 64 MB | 50 MB |
| Requires iOS | 15.0 | **12.2** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Aptus Speech and Language Therapy Limited](https://appshunter.io/developer/1482673468) | [Janine Toole](https://appshunter.io/developer/839832427) |

## What reviewers say

### Keyword Understanding

[App page](https://appshunter.io/ios/app/keyword-understanding/id816979055)

This app helps users of all ages improve their ability to understand spoken and written directions. It features various activities targeting vocabulary, basic concepts, and sequential instructions, making it beneficial for individuals with listening comprehension or processing difficulties.

**Highlights:** Follow spoken and written directions, Improve vocabulary and basic concepts, Target auditory attention and working memory, Activities for one and two-step directions, Temporal and sequential direction practice, Comprehension check for vocabulary and concepts

**Features:** macOS Compatibility

**In-app purchases:** none


### Comprehension Builder

[App page](https://appshunter.io/ios/app/comprehension-builder/id1238803041)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Keyword Understanding free?

Keyword Understanding costs $17.99, with no in-app purchases.

### Is Comprehension Builder free?

Comprehension Builder costs $7.99, with no in-app purchases.

### Do Keyword Understanding or Comprehension Builder have ads?

Neither Keyword Understanding nor Comprehension Builder shows ads.

### Which is updated more often, Keyword Understanding or Comprehension Builder?

Keyword Understanding ships an update every 10 months, and Comprehension Builder every 40 months. Most recently, Keyword Understanding was updated on September 3, 2026 and Comprehension Builder on September 19, 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.*