# Essential vs Headmasters Castlebar

The clearest difference is update cadence: Essential at every 4 months against Headmasters Castlebar's every 18 months. 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.

Essential ships an update every 4 months, Headmasters Castlebar every 18 months. The most recent releases landed on September 10, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Essential | Headmasters Castlebar |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 18 months |
| Size | 67 MB | 13 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [MDS Gateways](https://appshunter.io/developer/462823425) | [Tecwi Engineering GmbH](https://appshunter.io/developer/1462340550) |

## What reviewers say

### Essential

[App page](https://appshunter.io/ios/app/essential/id1358671889)

**Features:** macOS Compatibility, Siri integration

**In-app purchases:** none


### Headmasters Castlebar

[App page](https://appshunter.io/ios/app/headmasters-castlebar/id6466728746)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Essential free?

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

### Is Headmasters Castlebar free?

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

### Do Essential or Headmasters Castlebar have ads?

Neither Essential nor Headmasters Castlebar shows ads.

### Which is updated more often, Essential or Headmasters Castlebar?

Essential ships an update every 4 months, and Headmasters Castlebar every 18 months. Most recently, Essential was updated on September 10, 2026 and Headmasters Castlebar on September 9, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*