# 数理化 vs 口语易

The clearest difference is update cadence: 口语易 at every 6 weeks against 数理化's every 4 months. 口语易 also leads on iOS requirement (13.0 vs 15.0). 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.

数理化 ships an update every 4 months, 口语易 every 6 weeks. The most recent releases landed on September 15, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | 数理化 | 口语易 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 6 weeks** |
| Size | 25 MB | 146 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [永生 刘](https://appshunter.io/developer/830484999) | [广州飞硕信息科技股份有限公司](https://appshunter.io/developer/1094104398) |

## What reviewers say

### 数理化

[App page](https://appshunter.io/ios/app/id1212062256)

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

**In-app purchases:** none


### 口语易

[App page](https://appshunter.io/ios/app/id1502214101)

**In-app purchases:** none


## Frequently asked questions

### Is 数理化 free?

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

### Is 口语易 free?

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

### Do 数理化 or 口语易 have ads?

Neither 数理化 nor 口语易 shows ads.

### Which is updated more often, 数理化 or 口语易?

数理化 ships an update every 4 months, and 口语易 every 6 weeks. Most recently, 数理化 was updated on September 15, 2026 and 口语易 on September 27, 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.*