# 柳吟Line－導師版 vs 博士兒數理

The clearest difference is update cadence: 柳吟Line－導師版 at monthly against 博士兒數理's every 35 months. 柳吟Line－導師版 also leads on device support and iOS requirement (12.4 vs 15.0). On price 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.

柳吟Line－導師版 ships an update monthly, 博士兒數理 every 35 months. The most recent releases landed on October 15, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 柳吟Line－導師版 | 博士兒數理 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | — |
| Update frequency | **Monthly** | Every 35 months |
| Size | 38 MB | 196 MB |
| Requires iOS | **12.4** | 15.0 |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [柳吟文教事業股份有限公司](https://appshunter.io/developer/1752616012) | [Chi Hsien Lai](https://appshunter.io/developer/1039759515) |

## What reviewers say

### 柳吟Line－導師版

[App page](https://appshunter.io/ios/app/line/id1089028240)

**Features:** macOS Compatibility

**In-app purchases:** none


### 博士兒數理

[App page](https://appshunter.io/ios/app/id6472875333)

**In-app purchases:** none


## Frequently asked questions

### Is 柳吟Line－導師版 free?

柳吟Line－導師版 is free to download, with no in-app purchases.

### Is 博士兒數理 free?

博士兒數理 is free to download, with no in-app purchases.

### Which is updated more often, 柳吟Line－導師版 or 博士兒數理?

柳吟Line－導師版 ships an update monthly, and 博士兒數理 every 35 months. Most recently, 柳吟Line－導師版 was updated on October 15, 2026 and 博士兒數理 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.*