# otu.ai vs Haru Danim

The clearest difference is update cadence: Haru Danim at weekly against otu.ai's fortnightly. otu.ai's advantage is iOS requirement (15.1 vs 18.0). On price, ads, in-app purchases 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 and Haru Danim sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

otu.ai ships an update fortnightly, Haru Danim weekly. The most recent releases landed on October 3, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | otu.ai | Haru Danim |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Weekly** |
| Size | 27 MB | 31 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [opentutorials](https://appshunter.io/developer/1719897055) | [YECHAN SONG](https://appshunter.io/developer/6793969892) |

## 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 |


### Haru Danim

[App page](https://appshunter.io/ios/app/haru-danim-time-tracker/id6793969890)

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $2.99 | per month |
| Yearly | $29.99 | per year |
| Lifetime | $49.99 | one-time |


## Frequently asked questions

### Is otu.ai free?

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

### Is Haru Danim free?

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

### Do otu.ai or Haru Danim have ads?

Neither otu.ai nor Haru Danim shows ads.

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

otu.ai ships an update fortnightly, and Haru Danim weekly. Most recently, otu.ai was updated on October 3, 2026 and Haru Danim on October 16, 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.*