# Decoding Chart vs MathZAPP

The clearest difference is ads: Decoding Chart at none against MathZAPP's shown. MathZAPP's advantage is update cadence (fortnightly vs every 71 months) and device support (3 vs 1). On price and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Decoding Chart ships an update every 71 months, MathZAPP fortnightly. The most recent releases landed on September 9, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Decoding Chart | MathZAPP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (2 ratings)](https://appshunter.io/ios/app/decoding-chart-flip/id499927572/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 71 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 9 MB | 84 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Bob Baratta-Lorton](https://appshunter.io/developer/499646138) | [Colette Kent](https://appshunter.io/developer/1704717889) |

## What reviewers say

### Decoding Chart

[App page](https://appshunter.io/ios/app/decoding-chart-flip/id499927572)

This app is part of a reading and writing curriculum designed for beginning readers or those who have struggled with literacy. It helps children transition from recognizing sounds to understanding letter spellings, using color-coded charts to guide them.

**Highlights:** Sound-to-letter decoding, Color-coded spelling guidance, Frequency-based spelling order, Part of a comprehensive reading program, Supports beginning readers

**Features:** macOS Compatibility

**In-app purchases:** none


### MathZAPP

[App page](https://appshunter.io/ios/app/mathzapp/id6463654533)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Decoding Chart free?

Decoding Chart is free to download, with no in-app purchases.

### Is MathZAPP free?

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

### Do Decoding Chart or MathZAPP have ads?

MathZAPP shows ads; Decoding Chart does not.

### Which is updated more often, Decoding Chart or MathZAPP?

Decoding Chart ships an update every 71 months, and MathZAPP fortnightly. Most recently, Decoding Chart was updated on September 9, 2026 and MathZAPP on September 10, 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.*