# IP SHANGHAI vs Catendar

The clearest difference is update cadence: Catendar at every 5 days against IP SHANGHAI's every 2 months. IP SHANGHAI's advantage is iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

IP SHANGHAI ships an update every 2 months, Catendar every 5 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | IP SHANGHAI | Catendar |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Every 5 days** |
| Size | 59 MB | 13 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [上海澎湃在线网络科技有限公司](https://appshunter.io/developer/1446235315) | [Bumjoon Lee](https://appshunter.io/developer/6801095554) |

## What reviewers say

### IP SHANGHAI

[App page](https://appshunter.io/ios/app/ip-shanghai/id6444039581)

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

**In-app purchases:** none


### Catendar

[App page](https://appshunter.io/ios/app/catendar-shift-work-calendar/id6803623896)

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

**In-app purchases:** none


## Frequently asked questions

### Is IP SHANGHAI free?

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

### Is Catendar free?

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

### Do IP SHANGHAI or Catendar have ads?

Both IP SHANGHAI and Catendar show ads.

### Which is updated more often, IP SHANGHAI or Catendar?

IP SHANGHAI ships an update every 2 months, and Catendar every 5 days. Most recently, IP SHANGHAI was updated on October 25, 2026 and Catendar on October 24, 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.*