# Decoding Chart vs ExploreMath

The clearest difference is update cadence: ExploreMath at every 6 days against Decoding Chart's every 71 months. ExploreMath also leads on device support (3 vs 1). On price, ads, in-app purchases and iOS requirement 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, ExploreMath every 6 days. The most recent releases landed on September 25, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Decoding Chart | ExploreMath |
| --- | --- | --- |
| 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 | No |
| Update frequency | Every 71 months | **Every 6 days** |
| Monetization | Free | — |
| Size | 9 MB | 4 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Bob Baratta-Lorton](https://appshunter.io/developer/499646138) | [Kai Hin Tsoi](https://appshunter.io/developer/1618879551) |

## 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


### ExploreMath

[App page](https://appshunter.io/ios/app/exploremath/id1620810052)

**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 ExploreMath free?

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

### Do Decoding Chart or ExploreMath have ads?

Neither Decoding Chart nor ExploreMath shows ads.

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

Decoding Chart ships an update every 71 months, and ExploreMath every 6 days. Most recently, Decoding Chart was updated on September 25, 2026 and ExploreMath 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.*