# Rainbow Sentences vs Fraction Builder

The clearest difference is price: Fraction Builder at $1.99 against Rainbow Sentences's $9.99. Rainbow Sentences's advantage is update cadence (every 6 months vs every 22 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Rainbow Sentences costs $9.99 and Fraction Builder $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Rainbow Sentences ships an update every 6 months, Fraction Builder every 22 months. The most recent releases landed on October 21, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Rainbow Sentences | Fraction Builder |
| --- | --- | --- |
| Price | $9.99 | **$1.99** |
| Rating | **[3.7 (15 ratings)](https://appshunter.io/ios/app/rainbow-sentences/id427578209/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | 94.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 22 months |
| Monetization | Paid | — |
| Size | 179 MB | 12 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPad | **iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Mobile Education Store LLC](https://appshunter.io/developer/344378744) | [Ventura Educational Systems](https://appshunter.io/developer/371324172) |

## 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


### Fraction Builder

[App page](https://appshunter.io/ios/app/fraction-builder/id1166230428)

**In-app purchases:** none


## Frequently asked questions

### Is Rainbow Sentences free?

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

### Is Fraction Builder free?

Fraction Builder costs $1.99, with no in-app purchases.

### Do Rainbow Sentences or Fraction Builder have ads?

Neither Rainbow Sentences nor Fraction Builder shows ads.

### Which is updated more often, Rainbow Sentences or Fraction Builder?

Rainbow Sentences ships an update every 6 months, and Fraction Builder every 22 months. Most recently, Rainbow Sentences was updated on October 21, 2026 and Fraction Builder on October 26, 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.*