# P21 vs Smart Phonics 3rd 4

The clearest difference is update cadence: Smart Phonics 3rd 4 at every 3 weeks against P21's every 6 weeks. On price, ads, in-app purchases and monetization model there is nothing between them.

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

P21 ships an update every 6 weeks, Smart Phonics 3rd 4 every 3 weeks. The most recent releases landed on September 28, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | P21 | Smart Phonics 3rd 4 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/p21/id1453823561/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 226 MB | 1.5 GB |
| Requires iOS | 11.0 | 11.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CAVES BOOKS LTD.](https://appshunter.io/developer/547924599) | [e-future Co., Ltd.](https://appshunter.io/developer/522346678) |

## What reviewers say

### P21

[App page](https://appshunter.io/ios/app/p21/id1453823561)

This educational app supports a four-level phonics series for young learners. It offers audio tracks, videos, flashcards, and games to help children build foundational skills in phonological awareness, reading, and spelling.

**Highlights:** Audio tracks from student books, Educational videos, Keyword flashcards, Phonics games, Progress tracking

**Features:** macOS Compatibility

**In-app purchases:** none


### Smart Phonics 3rd 4

[App page](https://appshunter.io/ios/app/smart-phonics-3rd-4/id6469031297)

This educational app makes learning phonics engaging through a variety of interactive materials. It offers AI-powered speaking practice, animations, games, and flashcards to build essential English skills for young learners.

**Highlights:** AI-powered phonics speaking practice, Class audio files, Chant, song, and story animations, Flashcards and practice games, Interactive learning materials

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is P21 free?

P21 is free to download, with no in-app purchases.

### Is Smart Phonics 3rd 4 free?

Smart Phonics 3rd 4 is free to download, with no in-app purchases.

### Do P21 or Smart Phonics 3rd 4 have ads?

Neither P21 nor Smart Phonics 3rd 4 shows ads.

### Which is updated more often, P21 or Smart Phonics 3rd 4?

P21 ships an update every 6 weeks, and Smart Phonics 3rd 4 every 3 weeks. Most recently, P21 was updated on September 28, 2026 and Smart Phonics 3rd 4 on October 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.*