# iPhylum vs Chem Memo เคมี ม.4

The clearest difference is in-app purchases: iPhylum at none against Chem Memo เคมี ม.4's 1. iPhylum also leads on ads (none vs shown) and update cadence (fortnightly vs every 2 months). On price and device support there is nothing between them.

Both are free to download. Chem Memo เคมี ม.4 sells 1 one-off in-app purchase. iPhylum asks for nothing beyond the download.

iPhylum ships an update fortnightly, Chem Memo เคมี ม.4 every 2 months. The most recent releases landed on October 12, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | iPhylum | Chem Memo เคมี ม.4 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Free | — |
| Size | 20 MB | 28 MB |
| Requires iOS | **6.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Thitipong Wongsatho](https://appshunter.io/developer/683911170) | [ChatStick Company Limited](https://appshunter.io/developer/1165816085) |

## What reviewers say

### iPhylum

[App page](https://appshunter.io/ios/app/iphylum/id827715039)

This application simplifies the classification of animal phyla for educational purposes. It provides detailed information on the shared characteristics of animals and the criteria used for their classification into nine phyla.

**Highlights:** Animal phyla classification, Learning about animal characteristics, Educational tool for biology, Detailed biological information, Thai-developed educational app

**Features:** macOS Compatibility

**In-app purchases:** none


### Chem Memo เคมี ม.4

[App page](https://appshunter.io/ios/app/chem-memo-4-6/id6804657033)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Features | $2.99 | one-time |


## Frequently asked questions

### Is iPhylum free?

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

### Is Chem Memo เคมี ม.4 free?

Chem Memo เคมี ม.4 is free to download, with in-app purchases available.

### Do iPhylum or Chem Memo เคมี ม.4 have ads?

Chem Memo เคมี ม.4 shows ads; iPhylum does not.

### Which is updated more often, iPhylum or Chem Memo เคมี ม.4?

iPhylum ships an update fortnightly, and Chem Memo เคมี ม.4 every 2 months. Most recently, iPhylum was updated on October 12, 2026 and Chem Memo เคมี ม.4 on October 25, 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.*