# RC vs Si

The clearest difference is update cadence: RC at fortnightly against Si's every 5 months. RC also leads on iOS requirement (7.0 vs 9.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

RC ships an update fortnightly, Si every 5 months. The most recent releases landed on October 5, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | RC | Si |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rc-pro-gps/id1295059384/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 5 months |
| Monetization | Free | — |
| Size | 96 MB | 12 MB |
| Requires iOS | **7.0** | 9.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Guangdong Shiji Technology Co.,Ltd.](https://appshunter.io/developer/1405540461) | [旭日东方](https://appshunter.io/developer/1472957256) |

## What reviewers say

### RC

[App page](https://appshunter.io/ios/app/rc-pro-gps/id1295059384)

Control a toy quadrocopter using WiFi and receive real-time video transfer. Compatible with a range of iOS devices and versions.

**Highlights:** WiFi quadrocopter control, Real-time video transfer, iOS device compatibility, Supports multiple iPhone models, Real-time video streaming

**Features:** macOS Compatibility

**In-app purchases:** none


### Si

[App page](https://appshunter.io/ios/app/si-link/id1484583420)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RC free?

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

### Is Si free?

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

### Do RC or Si have ads?

Neither RC nor Si shows ads.

### Which is updated more often, RC or Si?

RC ships an update fortnightly, and Si every 5 months. Most recently, RC was updated on October 5, 2026 and Si on October 10, 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.*