# CastleLink2 vs DataLink V3

The clearest difference is update cadence: CastleLink2 at monthly against DataLink V3's every 9 months. DataLink V3's advantage is iOS requirement (14.0 vs 26.0). 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.

CastleLink2 ships an update monthly, DataLink V3 every 9 months. The most recent releases landed on September 8, 2026 and August 18, 2026 respectively.

## The numbers

| Metric | CastleLink2 | DataLink V3 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/castlelink2/id6743709203/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 9 months |
| Monetization | Free | — |
| Size | 35 MB | 8 MB |
| Requires iOS | 26.0 | **14.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Castle Creations Inc](https://appshunter.io/developer/1377811229) | [Hobbywing Technology Co.,Ltd](https://appshunter.io/developer/1033124554) |

## What reviewers say

### CastleLink2

[App page](https://appshunter.io/ios/app/castlelink2/id6743709203)

Connect to Castle Creations ESCs and BECs via Bluetooth to adjust settings, update firmware, and view data logs. Compatible with a wide range of ESCs and BECs, supporting both B-Link hardware versions.

**Highlights:** Connect to Castle Creations ESCs/BECs, Adjust settings, Update firmware, View data logs, Supports B-Link adapters, Wide ESC/BEC compatibility

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

**In-app purchases:** none


### DataLink V3

[App page](https://appshunter.io/ios/app/datalink-v3/id6752997274)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CastleLink2 free?

CastleLink2 is free to download, with no in-app purchases.

### Is DataLink V3 free?

DataLink V3 is free to download, with no in-app purchases.

### Do CastleLink2 or DataLink V3 have ads?

Neither CastleLink2 nor DataLink V3 shows ads.

### Which is updated more often, CastleLink2 or DataLink V3?

CastleLink2 ships an update monthly, and DataLink V3 every 9 months. Most recently, CastleLink2 was updated on September 8, 2026 and DataLink V3 on August 18, 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.*