# CORE vs O2M

The clearest difference is ads: CORE at none against O2M's shown. O2M's advantage is update cadence (every 9 months vs every 30 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

CORE ships an update every 30 months, O2M every 9 months. The most recent releases landed on September 10, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | CORE | O2M |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 30 months | **Every 9 months** |
| Size | 10 MB | 75 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [gyeongho No](https://appshunter.io/developer/1573217418) | [Dong Hyouck Kang](https://appshunter.io/developer/1573883661) |

## What reviewers say

### CORE

[App page](https://appshunter.io/ios/app/core/id1573217416)

**Features:** macOS Compatibility

**In-app purchases:** none


### O2M

[App page](https://appshunter.io/ios/app/o2m/id1573883659)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CORE free?

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

### Is O2M free?

O2M is free to download, with no in-app purchases.

### Do CORE or O2M have ads?

O2M shows ads; CORE does not.

### Which is updated more often, CORE or O2M?

CORE ships an update every 30 months, and O2M every 9 months. Most recently, CORE was updated on September 10, 2026 and O2M on September 15, 2026.

---

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