# ONTREE 지구를 지키는 작은 습관 온트리 vs ZIUM 지움

The clearest difference is update cadence: ZIUM 지움 at daily against ONTREE 지구를 지키는 작은 습관 온트리's every 3 weeks. ONTREE 지구를 지키는 작은 습관 온트리's advantage is device support (3 vs 1) and iOS requirement (14.0 vs 16.0). On price, 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.

ONTREE 지구를 지키는 작은 습관 온트리 ships an update every 3 weeks, ZIUM 지움 daily. The most recent releases landed on October 15, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | ONTREE 지구를 지키는 작은 습관 온트리 | ZIUM 지움 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 14.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Daily** |
| Monetization | Free | — |
| Size | 37 MB | 27 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Kyungran Kim](https://appshunter.io/developer/1443699006) | [G-School](https://appshunter.io/developer/1633954316) |

## What reviewers say

### ONTREE 지구를 지키는 작은 습관 온트리

[App page](https://appshunter.io/ios/app/ontree/id1610045371)

Cultivate eco-friendly habits by completing environmental missions and tracking your progress. Earn points to plant real trees and see your positive impact on the planet. Join your family and friends in collective environmental action.

**Highlights:** Complete 12 environmental missions, Earn points for missions and check-ins, Plant real trees with earned points, Track carbon reduction, View rankings among friends and groups, Participate in offline and online events

**Features:** macOS Compatibility

**In-app purchases:** none


### ZIUM 지움

[App page](https://appshunter.io/ios/app/zium/id6470136910)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ONTREE 지구를 지키는 작은 습관 온트리 free?

ONTREE 지구를 지키는 작은 습관 온트리 is free to download, with no in-app purchases.

### Is ZIUM 지움 free?

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

### Do ONTREE 지구를 지키는 작은 습관 온트리 or ZIUM 지움 have ads?

Neither ONTREE 지구를 지키는 작은 습관 온트리 nor ZIUM 지움 shows ads.

### Which is updated more often, ONTREE 지구를 지키는 작은 습관 온트리 or ZIUM 지움?

ONTREE 지구를 지키는 작은 습관 온트리 ships an update every 3 weeks, and ZIUM 지움 daily. Most recently, ONTREE 지구를 지키는 작은 습관 온트리 was updated on October 15, 2026 and ZIUM 지움 on October 8, 2026.

---

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