# BYECO2 vs WCEF2026

The clearest difference is update cadence: WCEF2026 at every 2 days against BYECO2's every 2 months. BYECO2's advantage is iOS requirement (12.0 vs 16.6). 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.

BYECO2 ships an update every 2 months, WCEF2026 every 2 days. The most recent releases landed on October 16, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | BYECO2 | WCEF2026 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 days** |
| Size | 31 MB | 68 MB |
| Requires iOS | **12.0** | 16.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [Thang Tran Quoc](https://appshunter.io/developer/1503529778) | [Central Pollution Control Board](https://appshunter.io/developer/1186664743) |

## What reviewers say

### BYECO2

[App page](https://appshunter.io/ios/app/byeco2/id1635925540)

**Features:** macOS Compatibility

**In-app purchases:** none


### WCEF2026

[App page](https://appshunter.io/ios/app/wcef2026/id6803448068)

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

**In-app purchases:** none


## Frequently asked questions

### Is BYECO2 free?

BYECO2 is free to download, with no in-app purchases.

### Is WCEF2026 free?

WCEF2026 is free to download, with no in-app purchases.

### Do BYECO2 or WCEF2026 have ads?

Neither BYECO2 nor WCEF2026 shows ads.

### Which is updated more often, BYECO2 or WCEF2026?

BYECO2 ships an update every 2 months, and WCEF2026 every 2 days. Most recently, BYECO2 was updated on October 16, 2026 and WCEF2026 on October 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.*