# Otter Curiosity vs Duluu

The clearest difference is in-app purchases: Duluu at none against Otter Curiosity's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Otter Curiosity sells 2 in-app purchases, starting at $7.99 per month. Duluu asks for nothing beyond the download.

Otter Curiosity ships an update every 2 weeks, Duluu every 10 days. The most recent releases landed on October 13, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Otter Curiosity | Duluu |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 10 days** |
| Size | 72 MB | 109 MB |
| Requires iOS | **14.0.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Chang-Shen Wu](https://appshunter.io/developer/1687362208) | [Wei-Jr Lai](https://appshunter.io/developer/1676422232) |

## What reviewers say

### Otter Curiosity

[App page](https://appshunter.io/ios/app/otter-curiosity/id6449002669)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Otter Member | $7.99 | per month |
| 好奇海獺貝殼 | $5.99 | one-time |


### Duluu

[App page](https://appshunter.io/ios/app/duluu/id6463662378)

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

**In-app purchases:** none


## Frequently asked questions

### Is Otter Curiosity free?

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

### Is Duluu free?

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

### Do Otter Curiosity or Duluu have ads?

Neither Otter Curiosity nor Duluu shows ads.

### Which is updated more often, Otter Curiosity or Duluu?

Otter Curiosity ships an update every 2 weeks, and Duluu every 10 days. Most recently, Otter Curiosity was updated on October 13, 2026 and Duluu on October 8, 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.*