# 66智修 vs CIEC

The clearest difference is iOS requirement: CIEC at 13.0 against 66智修's 15.6. On price, update cadence, ads and in-app purchases there is nothing between them.

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

66智修 ships an update every 5 days, CIEC every 6 days. The most recent releases landed on September 12, 2026 and May 19, 2026 respectively.

## The numbers

| Metric | 66智修 | CIEC |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 6 days |
| Size | 143 MB | 7 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Zhi Chen Network Technology](https://appshunter.io/developer/1423019270) | [Anh Nguyen Duc](https://appshunter.io/developer/1574177561) |

## What reviewers say

### 66智修

[App page](https://appshunter.io/ios/app/66/id1444248925)

**In-app purchases:** none


### CIEC

[App page](https://appshunter.io/ios/app/ciec/id1578402980)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 66智修 free?

66智修 is free to download, with no in-app purchases.

### Is CIEC free?

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

### Do 66智修 or CIEC have ads?

Neither 66智修 nor CIEC shows ads.

### Which is updated more often, 66智修 or CIEC?

66智修 ships an update every 5 days, and CIEC every 6 days. Most recently, 66智修 was updated on September 12, 2026 and CIEC on May 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.*