# SDC vs Lingo Diary

The clearest difference is in-app purchases: SDC at none against Lingo Diary's 3. SDC also leads on ads (none vs shown) and device support (3 vs 1). Lingo Diary's advantage is update cadence (every 9 days vs every 2 months). 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. SDC asks for nothing beyond the download.

SDC ships an update every 2 months, Lingo Diary every 9 days. The most recent releases landed on September 20, 2026 and July 11, 2026 respectively.

## The numbers

| Metric | SDC | Lingo Diary |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 9 days** |
| Size | 8 MB | 44 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Chung-Ming Huang](https://appshunter.io/developer/1003733181) | [SPARKLECT CO.,LTD.](https://appshunter.io/developer/1609566694) |

## What reviewers say

### SDC

[App page](https://appshunter.io/ios/app/sdc-deh-lite/id1552530246)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is SDC free?

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

### Is Lingo Diary free?

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

### Do SDC or Lingo Diary have ads?

Lingo Diary shows ads; SDC does not.

### Which is updated more often, SDC or Lingo Diary?

SDC ships an update every 2 months, and Lingo Diary every 9 days. Most recently, SDC was updated on September 20, 2026 and Lingo Diary on July 11, 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.*