# BBX ECO2 vs Unmark

The clearest difference is in-app purchases: BBX ECO2 at none against Unmark's 1. BBX ECO2 also leads on iOS requirement (13.0 vs 17.0). Unmark's advantage is update cadence (every 2 weeks vs every 40 months). On price, ads and device support there is nothing between them.

Both are free to download. Unmark sells 1 one-off in-app purchase. BBX ECO2 asks for nothing beyond the download.

BBX ECO2 ships an update every 40 months, Unmark every 2 weeks. The most recent releases landed on November 12, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | BBX ECO2 | Unmark |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 40 months | **Every 2 weeks** |
| Size | 11 MB | 13 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [AMI Automation LLC](https://appshunter.io/developer/943514399) | [Tien Dat Nguyen](https://appshunter.io/developer/1896097777) |

## What reviewers say

### BBX ECO2

[App page](https://appshunter.io/ios/app/bbx-eco2/id6444162375)

**Features:** macOS Compatibility

**In-app purchases:** none


### Unmark

[App page](https://appshunter.io/ios/app/unmark-paste-ai-as-formatted/id6810102411)

**Features:** Vision Pro support, iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unmark Pro | $4.99 | one-time |


## Frequently asked questions

### Is BBX ECO2 free?

BBX ECO2 is free to download, with no in-app purchases.

### Is Unmark free?

Unmark is free to download, with in-app purchases available.

### Do BBX ECO2 or Unmark have ads?

Neither BBX ECO2 nor Unmark shows ads.

### Which is updated more often, BBX ECO2 or Unmark?

BBX ECO2 ships an update every 40 months, and Unmark every 2 weeks. Most recently, BBX ECO2 was updated on November 12, 2026 and Unmark on November 9, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*