# 易则易知 vs 国学日历

The clearest difference is price: 易则易知 at Free against 国学日历's $0.99. 易则易知 also leads on iOS requirement (11.0 vs 18.6). 国学日历's advantage is update cadence (daily vs every 5 weeks). On ads, in-app purchases and device support there is nothing between them.

易则易知 is free to download; 国学日历 costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

易则易知 ships an update every 5 weeks, 国学日历 daily. The most recent releases landed on October 27, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 易则易知 | 国学日历 |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Daily** |
| Size | 19 MB | 18 MB |
| Requires iOS | **11.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [上海易知信息科技股份有限公司](https://appshunter.io/developer/1439442031) | [阳 韩](https://appshunter.io/developer/1892054422) |

## What reviewers say

### 易则易知

[App page](https://appshunter.io/ios/app/id1502945729)

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

**In-app purchases:** none


### 国学日历

[App page](https://appshunter.io/ios/app/id6761963228)

**In-app purchases:** none


## Frequently asked questions

### Is 易则易知 free?

易则易知 is free to download, with no in-app purchases.

### Is 国学日历 free?

国学日历 costs $0.99, with no in-app purchases.

### Do 易则易知 or 国学日历 have ads?

Neither 易则易知 nor 国学日历 shows ads.

### Which is updated more often, 易则易知 or 国学日历?

易则易知 ships an update every 5 weeks, and 国学日历 daily. Most recently, 易则易知 was updated on October 27, 2026 and 国学日历 on October 31, 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.*