# Rainbow Sentences vs Keyword Understanding

The clearest difference is review sentiment: Rainbow Sentences at 94% against Keyword Understanding's 25%. Rainbow Sentences also leads on price ($9.99 vs $17.99) and ratings volume (15 vs 3). Keyword Understanding's advantage is rating (5.0 vs 3.7) and device support (3 vs 1). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

Rainbow Sentences costs $9.99 and Keyword Understanding $17.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Keyword Understanding holds the better App Store score, 5.0 against 3.7. That said, the two scores are not equally well evidenced: Rainbow Sentences has 15 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 94% of Rainbow Sentences's written reviews are positive against 25% of Keyword Understanding's, so the app with the better star average is not the one people write more warmly about.

Rainbow Sentences ships an update every 6 months, Keyword Understanding every 10 months. The most recent releases landed on October 21, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Rainbow Sentences | Keyword Understanding |
| --- | --- | --- |
| Price | **$9.99** | $17.99 |
| Rating | [3.7 (15 ratings)](https://appshunter.io/ios/app/rainbow-sentences/id427578209/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/keyword-understanding/id816979055/reviews)** |
| Number of ratings | **15** | 3 |
| Positive reviews | **94.4% of reviews** | 25.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 10 months |
| Monetization | Paid | Paid |
| Size | 179 MB | 64 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Mobile Education Store LLC](https://appshunter.io/developer/344378744) | [Aptus Speech and Language Therapy Limited](https://appshunter.io/developer/1482673468) |

## What reviewers say

### Rainbow Sentences

[App page](https://appshunter.io/ios/app/rainbow-sentences/id427578209)

This app uses color-coded visual cues to help students construct grammatically correct sentences. It breaks down sentence parts like who, what, and where, allowing users to build and record sentences in their own voice. Designed for young learners, it offers interactive lessons and engaging rewards.

**Highlights:** Color-coded sentence parts, Drag and drop sentence creation, Audio support for words, Sentence recording and saving, 6 levels of sentence complexity, Pictograph lessons, Earnable puzzle piece rewards

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Highly customizable and adaptable
- 🎨 Color-coding for visual learners
- 🗣️ Recording and playback feature
- 🧩 Motivating reward system (puzzles)
- 📊 Progress tracking and reporting

**What reviewers complain about**

- 😠 Ads in a paid app
- 🚫 Unremovable advertisements
- 🐛 App loads into settings
- 🧩 Puzzle can be distracting
- 🚧 Cannot go from sentence building to settings/stats

**Reported bugs**

- Advertisement cannot be gotten rid of
- App loads into settings
- Program loads into settings options
- Advertisement for another Mobile app that cannot be gotten rid of
- App description page only scrolls partway

**Requested features**

- Remove ads from paid app
- Set app to load into play mode by default
- Restrict settings for adults only
- Add questions and past/future tenses
- Make pictures more age-appropriate for high school


### 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


## Frequently asked questions

### Is Rainbow Sentences free?

Rainbow Sentences costs $9.99, with no in-app purchases.

### Is Keyword Understanding free?

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

### Which has better reviews, Rainbow Sentences or Keyword Understanding?

Keyword Understanding is rated higher. Rainbow Sentences averages 3.7 out of 5 from 15 ratings, while Keyword Understanding averages 5.0 from 3 ratings.

### Do Rainbow Sentences or Keyword Understanding have ads?

Neither Rainbow Sentences nor Keyword Understanding shows ads.

### Which is updated more often, Rainbow Sentences or Keyword Understanding?

Rainbow Sentences ships an update every 6 months, and Keyword Understanding every 10 months. Most recently, Rainbow Sentences was updated on October 21, 2026 and Keyword Understanding on October 23, 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.*