# TTC vs BYECO2

The clearest difference is update cadence: TTC at monthly against BYECO2's every 2 months. 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.

TTC ships an update monthly, BYECO2 every 2 months. The most recent releases landed on October 11, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | TTC | BYECO2 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Size | 46 MB | 31 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Do Quang](https://appshunter.io/developer/1615025876) | [Thang Tran Quoc](https://appshunter.io/developer/1503529778) |

## What reviewers say

### TTC

[App page](https://appshunter.io/ios/app/ttc-cam/id1617036123)

**Features:** macOS Compatibility

**In-app purchases:** none


### BYECO2

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TTC free?

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

### Is BYECO2 free?

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

### Do TTC or BYECO2 have ads?

Neither TTC nor BYECO2 shows ads.

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

TTC ships an update monthly, and BYECO2 every 2 months. Most recently, TTC was updated on October 11, 2026 and BYECO2 on October 16, 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.*