# RelayCat编程助手 vs Shellby

The clearest difference is in-app purchases: RelayCat编程助手 at none against Shellby's 3. On price, review sentiment, update cadence and ads there is nothing between them.

Both are free to download. Shellby sells 3 in-app purchases, starting at $1.99 per month. RelayCat编程助手 asks for nothing beyond the download.

RelayCat编程助手 ships an update every 6 days, Shellby every 11 days. The most recent releases landed on October 9, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | RelayCat编程助手 | Shellby |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 11 days |
| Monetization | **Free** | Freemium |
| Size | 6 MB | 15 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Miyi Technology Co., Ltd.](https://appshunter.io/developer/6781284516) | [荟 马](https://appshunter.io/developer/1859998670) |

## What reviewers say

### RelayCat编程助手

[App page](https://appshunter.io/ios/app/relaycat/id6781284514)

Safely control your local AI coding agent remotely from your iPhone. Monitor progress, respond to commands, and approve actions without needing to be at your computer.

**Highlights:** Remote AI coding agent control, Monitor coding progress, Respond to commands, Approve actions, Sync ideas remotely

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

**In-app purchases:** none


### Shellby

[App page](https://appshunter.io/ios/app/shellby-ssh-client-and-terminal/id6786177565)

A native SSH client for Apple devices that offers SFTP, tunnels, and server monitoring. It features an AI assistant to translate plain language tasks into commands and Mosh-compatible transport for resilient sessions.

**Highlights:** AI-powered command generation, Mosh-compatible sessions, SFTP file transfer, Port forwarding and tunnels, Server monitoring (CPU, memory), On-screen key bar

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $1.99 | per month |
| Pro Yearly | $9.99 | per year |
| Pro Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is RelayCat编程助手 free?

RelayCat编程助手 is free to download, with no in-app purchases.

### Is Shellby free?

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

### Do RelayCat编程助手 or Shellby have ads?

Neither RelayCat编程助手 nor Shellby shows ads.

### Which is updated more often, RelayCat编程助手 or Shellby?

RelayCat编程助手 ships an update every 6 days, and Shellby every 11 days. Most recently, RelayCat编程助手 was updated on October 9, 2026 and Shellby on October 2, 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.*