# Lingo Diary vs Sink In

The clearest difference is in-app purchases: Sink In at none against Lingo Diary's 3. Sink In also leads on ads (none vs shown) and device support (3 vs 1). Lingo Diary's advantage is update cadence (every 3 days vs every 2 weeks). On price there is nothing between them.

Both are free to download. Lingo Diary sells 3 in-app purchases, starting at $9.99 per month. Sink In asks for nothing beyond the download.

Lingo Diary ships an update every 3 days, Sink In every 2 weeks. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Lingo Diary | Sink In |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sink-in-language-in-context/id6786764536/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 days** | Every 2 weeks |
| Monetization | — | Free |
| Size | 46 MB | 39 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [SPARKLECT CO.,LTD.](https://appshunter.io/developer/1609566694) | [Syuan Yu Siao](https://appshunter.io/developer/6784940490) |

## What reviewers say

### Lingo Diary

[App page](https://appshunter.io/ios/app/lingo-diary-learn-by-talking/id6760644930)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus | $9.99 | per month |
| Pro | $12.99 | per month |
| Max | $19.99 | per month |


### Sink In

[App page](https://appshunter.io/ios/app/sink-in-language-in-context/id6786764536)

Learn languages by transforming any text into interactive lessons. Analyze vocabulary, grammar, tone, and sentence structure. Practice with spaced repetition, quizzes, and timed challenges.

**Highlights:** Screenshot and paste text for lessons, On-device text recognition, Vocabulary, grammar, tone analysis, Spaced repetition review, Quiz and timed challenge modes, Cross-device learning history sync

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

**In-app purchases:** none


## Frequently asked questions

### Is Lingo Diary free?

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

### Is Sink In free?

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

### Do Lingo Diary or Sink In have ads?

Lingo Diary shows ads; Sink In does not.

### Which is updated more often, Lingo Diary or Sink In?

Lingo Diary ships an update every 3 days, and Sink In every 2 weeks. Most recently, Lingo Diary was updated on October 25, 2026 and Sink In 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.*