# otu.ai vs Daylin

The clearest difference is in-app purchases: Daylin at none against otu.ai's 2. Daylin also leads on iOS requirement (13.0 vs 15.1). On price, update cadence, ads and device support there is nothing between them.

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

otu.ai ships an update fortnightly, Daylin every 11 days. The most recent releases landed on September 16, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | otu.ai | Daylin |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 11 days** |
| Size | 27 MB | 20 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [opentutorials](https://appshunter.io/developer/1719897055) | [HANEUL KIM](https://appshunter.io/developer/6771738414) |

## What reviewers say

### otu.ai

[App page](https://appshunter.io/ios/app/otuai/id6473810282)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $4.99 | per month |
| Yearly Subscription | $44.99 | per year |


### Daylin

[App page](https://appshunter.io/ios/app/daylin/id6784880001)

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

**In-app purchases:** none


## Frequently asked questions

### Is otu.ai free?

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

### Is Daylin free?

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

### Do otu.ai or Daylin have ads?

Neither otu.ai nor Daylin shows ads.

### Which is updated more often, otu.ai or Daylin?

otu.ai ships an update fortnightly, and Daylin every 11 days. Most recently, otu.ai was updated on September 16, 2026 and Daylin on September 19, 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.*