# Decodable Readers Australia L4 vs Grass Fire

The clearest difference is price: Grass Fire at Free against Decodable Readers Australia L4's $15.99. Grass Fire also leads on iOS requirement (12.0 vs 14.1). On update cadence, ads, in-app purchases and device support there is nothing between them.

Grass Fire is free to download; Decodable Readers Australia L4 costs $15.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Decodable Readers Australia L4 ships an update every 16 months, Grass Fire every 15 months. The most recent releases landed on November 7, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Decodable Readers Australia L4 | Grass Fire |
| --- | --- | --- |
| Price | $15.99 | **Free** |
| Rating | — | **[1.0 (3 ratings)](https://appshunter.io/ios/app/grass-fire/id1440445499/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 15 months** |
| Monetization | — | Free |
| Size | 782 MB | 66 MB |
| Requires iOS | 14.1 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Decodable Readers Australia](https://appshunter.io/developer/1291420175) | [arludo Pty Ltd](https://appshunter.io/developer/1023251086) |

## What reviewers say

### Decodable Readers Australia L4

[App page](https://appshunter.io/ios/app/decodable-readers-australia-l4/id1357945560)

**Features:** macOS Compatibility

**In-app purchases:** none


### Grass Fire

[App page](https://appshunter.io/ios/app/grass-fire/id1440445499)

This educational app explores how the human brain interprets visual shapes. It's designed to help users understand the cognitive processes behind shape recognition and perception.

**Highlights:** Understanding shape interpretation, Cognitive process exploration, Visual perception testing, Educational content

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Decodable Readers Australia L4 free?

Decodable Readers Australia L4 costs $15.99, with no in-app purchases.

### Is Grass Fire free?

Grass Fire is free to download, with no in-app purchases.

### Do Decodable Readers Australia L4 or Grass Fire have ads?

Neither Decodable Readers Australia L4 nor Grass Fire shows ads.

### Which is updated more often, Decodable Readers Australia L4 or Grass Fire?

Decodable Readers Australia L4 ships an update every 16 months, and Grass Fire every 15 months. Most recently, Decodable Readers Australia L4 was updated on November 7, 2026 and Grass Fire on November 2, 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.*