# Sidney CSD vs FlashForge

The clearest difference is price: Sidney CSD at Free against FlashForge's $2.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

Sidney CSD is free to download; FlashForge costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Sidney CSD ships an update every 2 months, FlashForge monthly. The most recent releases landed on September 15, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Sidney CSD | FlashForge |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Size | 142 MB | 7 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Sidney Central School District](https://appshunter.io/developer/1527302545) | [Taein Kim](https://appshunter.io/developer/1256839730) |

## What reviewers say

### Sidney CSD

[App page](https://appshunter.io/ios/app/sidney-csd/id6744473535)

**In-app purchases:** none


### FlashForge

[App page](https://appshunter.io/ios/app/flashforge/id6759084535)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sidney CSD free?

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

### Is FlashForge free?

FlashForge costs $2.99, with no in-app purchases.

### Do Sidney CSD or FlashForge have ads?

Neither Sidney CSD nor FlashForge shows ads.

### Which is updated more often, Sidney CSD or FlashForge?

Sidney CSD ships an update every 2 months, and FlashForge monthly. Most recently, Sidney CSD was updated on September 15, 2026 and FlashForge on September 29, 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.*