# Chakra STEM vs Plastic Pollution Negotiations

The clearest difference is iOS requirement: Chakra STEM at 13.0 against Plastic Pollution Negotiations's 16.1. On price, update cadence, ads 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.

Chakra STEM ships an update monthly, Plastic Pollution Negotiations every 3 weeks. The most recent releases landed on September 30, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Chakra STEM | Plastic Pollution Negotiations |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Size | 57 MB | 22 MB |
| Requires iOS | **13.0** | 16.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 12+ |
| Developer | [Ministry of Environment Cambodia](https://appshunter.io/developer/1727580743) | [UNEP](https://appshunter.io/developer/1106793919) |

## What reviewers say

### Chakra STEM

[App page](https://appshunter.io/ios/app/chakra-stem/id6504170842)

**Features:** macOS Compatibility

**In-app purchases:** none


### Plastic Pollution Negotiations

[App page](https://appshunter.io/ios/app/plastic-pollution-negotiations/id6747729658)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Chakra STEM free?

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

### Is Plastic Pollution Negotiations free?

Plastic Pollution Negotiations is free to download, with no in-app purchases.

### Do Chakra STEM or Plastic Pollution Negotiations have ads?

Neither Chakra STEM nor Plastic Pollution Negotiations shows ads.

### Which is updated more often, Chakra STEM or Plastic Pollution Negotiations?

Chakra STEM ships an update monthly, and Plastic Pollution Negotiations every 3 weeks. Most recently, Chakra STEM was updated on September 30, 2026 and Plastic Pollution Negotiations 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.*