# YAM vs 온리원 레슨

The clearest difference is device support: YAM at 3 against 온리원 레슨's 1. YAM also leads on iOS requirement (12.0 vs 26.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. YAM sells 3 one-off in-app purchases and 온리원 레슨 sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 10 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | YAM | 온리원 레슨 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | Every 10 days |
| Size | 599 MB | 201 MB |
| Requires iOS | **12.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [weclover. Inc.](https://appshunter.io/developer/1631781617) | [VISANG EDUCATION INC](https://appshunter.io/developer/992780061) |

## What reviewers say

### YAM

[App page](https://appshunter.io/ios/app/yam-e-coding/id1631781495)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1개월 이용권 | $9.99 | one-time |
| 3개월 이용권 | $29.99 | one-time |
| 12개월 이용권 | $99.99 | one-time |


### 온리원 레슨

[App page](https://appshunter.io/ios/app/id6792592251)

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 한끝 역사2 윤미 3-2 학습 이용권 (180일) | $79.99 | one-time |
| 한끝 사회1 윤미 1-2 학습 이용권 (180일) | $89.99 | one-time |
| 한끝 역사1 남현민 2-2 학습 이용권 (180일) | $89.99 | one-time |
| 오투 과학 안현정 3-2 학습 이용권 (180일) | $89.99 | one-time |
| 오투 과학 안현정 1-2 학습 이용권 (180일) | $99.99 | one-time |
| 오투 과학 조민서 2-2 학습 이용권 (180일) | $99.99 | one-time |
| 개념+유형 라이트 장계환 1-2 학습 이용권 (180일) | $99.99 | one-time |
| 개념+유형 라이트 이도일 2-2 학습 이용권 (180일) | $99.99 | one-time |
| 한끝 사회2 윤미 3-2 학습 이용권 (180일) | $99.99 | one-time |
| 개념+유형 라이트 장계환 3-2 학습 이용권 (180일) | $99.99 | one-time |


## Frequently asked questions

### Is YAM free?

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

### Is 온리원 레슨 free?

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

### Do YAM or 온리원 레슨 have ads?

Neither YAM nor 온리원 레슨 shows ads.

### Which is updated more often, YAM or 온리원 레슨?

YAM ships an update every 10 days, and 온리원 레슨 every 10 days. Most recently, YAM was updated on November 3, 2026 and 온리원 레슨 on October 31, 2026.

---

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