# Flash Syllabes vs SDM 2023

The clearest difference is in-app purchases: SDM 2023 at none against Flash Syllabes's 10. SDM 2023 also leads on update cadence (daily vs every 2 weeks) and iOS requirement (13.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. Flash Syllabes sells 10 in-app purchases, starting at $5.99 per month. SDM 2023 asks for nothing beyond the download.

Flash Syllabes ships an update every 2 weeks, SDM 2023 daily. The most recent releases landed on October 18, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Flash Syllabes | SDM 2023 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Daily** |
| Size | 202 MB | 12 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [AKISTO Software](https://appshunter.io/developer/1638766096) | [Christophe Auclair](https://appshunter.io/developer/1333526155) |

## What reviewers say

### Flash Syllabes

[App page](https://appshunter.io/ios/app/flash-syllabes/id1638765884)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Flash Syllabes Education | $5.99 | per month |
| Flash Syllabes Famille | $11.99 | per 6 months |
| Flash Syllabes Ortho | $12.49 | per month |
| Flash Syllabes Education | $15.49 | per 3 months |
| Flash Syllabes Famille | $20.99 | per year |
| Flash Syllabes Education | $26.99 | per 6 months |
| Flash Syllabes Ortho | $33.99 | per 3 months |
| Flash Syllabes Education | $46.99 | per year |
| Flash Syllabes Ortho | $58.99 | per 6 months |
| Flash Syllabes Ortho | $100.99 | per year |


### SDM 2023

[App page](https://appshunter.io/ios/app/sdm-2023/id1668584291)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Flash Syllabes free?

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

### Is SDM 2023 free?

SDM 2023 is free to download, with no in-app purchases.

### Do Flash Syllabes or SDM 2023 have ads?

Neither Flash Syllabes nor SDM 2023 shows ads.

### Which is updated more often, Flash Syllabes or SDM 2023?

Flash Syllabes ships an update every 2 weeks, and SDM 2023 daily. Most recently, Flash Syllabes was updated on October 18, 2026 and SDM 2023 on October 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.*