# pdf转换器 vs Linva

The clearest difference is update cadence: Linva at every 2 days against pdf转换器's every 4 weeks. pdf转换器's advantage is iOS requirement (12.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. pdf转换器 sells 2 in-app purchases, starting at $4.99 per 7 days and Linva sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

pdf转换器 ships an update every 4 weeks, Linva every 2 days. The most recent releases landed on September 22, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | pdf转换器 | Linva |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/linva-language-learning/id6779910237/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 2 days** |
| Monetization | — | Freemium |
| Size | 20 MB | 40 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 17+ | 17+ |
| Developer | [文 罗](https://appshunter.io/developer/1709424450) | [贵博 董](https://appshunter.io/developer/6775821249) |

## What reviewers say

### pdf转换器

[App page](https://appshunter.io/ios/app/pdf/id6472162112)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 周会员 | $4.99 | per 7 days |
| 月会员 | $12.99 | per month |


### Linva

[App page](https://appshunter.io/ios/app/linva-language-learning/id6779910237)

Learn languages through immersive, AI-powered lessons. Generate lessons from any text, practice pronunciation with real-time feedback, and engage in AI-driven conversations. Track progress and build vocabulary with a comprehensive approach.

**Highlights:** AI-generated lessons from any text, Native-quality text-to-speech audio, Bilingual reading with synced phonetics, Real-time pronunciation scoring, Shadowing with pitch waveform analysis, AI conversation practice, Dictation and vocabulary building

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $2.99 | per month |
| Yearly | $29.99 | per year |


## Frequently asked questions

### Is pdf转换器 free?

pdf转换器 is free to download, with in-app purchases available.

### Is Linva free?

Linva is free to download, with in-app purchases available.

### Do pdf转换器 or Linva have ads?

Neither pdf转换器 nor Linva shows ads.

### Which is updated more often, pdf转换器 or Linva?

pdf转换器 ships an update every 4 weeks, and Linva every 2 days. Most recently, pdf转换器 was updated on September 22, 2026 and Linva on September 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.*