# Zero Waste Forum vs COP31

The clearest difference is update cadence: COP31 at every 3 days against Zero Waste Forum's every 10 days. COP31 also leads on iOS requirement (13.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

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

Zero Waste Forum ships an update every 10 days, COP31 every 3 days. The most recent releases landed on October 30, 2026 and November 13, 2026 respectively.

## The numbers

| Metric | Zero Waste Forum | COP31 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (3 ratings)](https://appshunter.io/ios/app/cop31/id6789030250/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 3 days** |
| Size | 46 MB | 195 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [SIFIR ATIK VAKFI](https://appshunter.io/developer/1885537379) | [T.C. Cevre, Sehircilik ve Iklim Degisikligi Bakanlıgı](https://appshunter.io/developer/1371359844) |

## What reviewers say

### Zero Waste Forum

[App page](https://appshunter.io/ios/app/zero-waste-forum/id6753621990)

**Features:** macOS Compatibility

**In-app purchases:** none


### COP31

[App page](https://appshunter.io/ios/app/cop31/id6789030250)

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

**In-app purchases:** none


## Frequently asked questions

### Is Zero Waste Forum free?

Zero Waste Forum is free to download, with no in-app purchases.

### Is COP31 free?

COP31 is free to download, with no in-app purchases.

### Do Zero Waste Forum or COP31 have ads?

Neither Zero Waste Forum nor COP31 shows ads.

### Which is updated more often, Zero Waste Forum or COP31?

Zero Waste Forum ships an update every 10 days, and COP31 every 3 days. Most recently, Zero Waste Forum was updated on October 30, 2026 and COP31 on November 13, 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.*