# 서울대공원 vs LingoDuet

The clearest difference is in-app purchases: 서울대공원 at none against LingoDuet's 2. 서울대공원 also leads on iOS requirement (13.0 vs 18.0). LingoDuet's advantage is update cadence (every 4 days vs every 6 weeks). On price, ads and device support there is nothing between them.

Both are free to download. LingoDuet sells 2 in-app purchases, starting at $4.99 per month. 서울대공원 asks for nothing beyond the download.

서울대공원 ships an update every 6 weeks, LingoDuet every 4 days. The most recent releases landed on November 2, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 서울대공원 | LingoDuet |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 4 days** |
| Size | 66 MB | 8 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Seoul Metropolitan Government](https://appshunter.io/developer/444447999) | [Taner Cetin](https://appshunter.io/developer/6774316486) |

## What reviewers say

### 서울대공원

[App page](https://appshunter.io/ios/app/id1048873787)

**Features:** Vision Pro support

**In-app purchases:** none


### LingoDuet

[App page](https://appshunter.io/ios/app/lingoduet/id6774316484)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $4.99 | per month |
| Annual | $29.99 | per year |


## Frequently asked questions

### Is 서울대공원 free?

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

### Is LingoDuet free?

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

### Do 서울대공원 or LingoDuet have ads?

Neither 서울대공원 nor LingoDuet shows ads.

### Which is updated more often, 서울대공원 or LingoDuet?

서울대공원 ships an update every 6 weeks, and LingoDuet every 4 days. Most recently, 서울대공원 was updated on November 2, 2026 and LingoDuet on October 25, 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.*