# Arch Calendar vs 우수AI

The clearest difference is update cadence: Arch Calendar at every 9 days against 우수AI's every 3 weeks. Arch Calendar also leads on iOS requirement (16.4 vs 18.0). On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. Arch Calendar sells 2 in-app purchases, starting at $6.00 per month and 우수AI sells 2 in-app purchases, starting at $30.99 per month. Whichever you choose, the download price is not the number that matters.

Arch Calendar ships an update every 9 days, 우수AI every 3 weeks. The most recent releases landed on November 9, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Arch Calendar | 우수AI |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 76.9% of reviews | **83.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 3 weeks |
| Monetization | Freemium | Freemium |
| Size | 126 MB | 11 MB |
| Requires iOS | **16.4** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [MOBA Incorporated](https://appshunter.io/developer/1823577996) | [mobldi](https://appshunter.io/developer/1555909528) |

## What reviewers say

### Arch Calendar

[App page](https://appshunter.io/ios/app/arch-calendar-time-blocking/id6753331558)

This minimal calendar app unifies tasks and scheduling into a single interface. Capture ideas instantly and drag them onto time blocks to organize your day. It focuses on essential functionality to help you stay focused and productive.

**Highlights:** Quick task and idea capture, Drag-and-drop time blocking, Organize work by categories, Streamlined interface, Minimalist design

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $6.00 | per month |
| Yearly Plan | $48.00 | per year |


### 우수AI

[App page](https://appshunter.io/ios/app/ai-ai/id6790740076)

Access a wide range of advanced AI models for text, image, and video creation and analysis in one app. Compare AI responses, analyze various file formats, and generate high-quality visuals with a single subscription.

**Highlights:** Access 30+ global AI models with one subscription, Compare AI responses side-by-side, Analyze 126 file formats with OCR, Generate images and videos with AI, Local storage for conversation history, Folder-based organization for projects

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OosooAI Platinum Air - Monthly | $30.99 | per month |
| OosooAI Platinum Air - Annual | $319.99 | per year |


## Frequently asked questions

### Is Arch Calendar free?

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

### Is 우수AI free?

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

### Do Arch Calendar or 우수AI have ads?

Neither Arch Calendar nor 우수AI shows ads.

### Which is updated more often, Arch Calendar or 우수AI?

Arch Calendar ships an update every 9 days, and 우수AI every 3 weeks. Most recently, Arch Calendar was updated on November 9, 2026 and 우수AI on November 10, 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.*