# HSE 4.0 vs ArboRefD

The clearest difference is in-app purchases: HSE 4.0 at none against ArboRefD's 8. HSE 4.0 also leads on iOS requirement (13.0 vs 15.6). ArboRefD's advantage is update cadence (every 4 weeks vs every 8 months) and device support (4 vs 2). On price and ads there is nothing between them.

Both are free to download. ArboRefD sells 8 one-off in-app purchases. HSE 4.0 asks for nothing beyond the download.

HSE 4.0 ships an update every 8 months, ArboRefD every 4 weeks. The most recent releases landed on May 16, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | HSE 4.0 | ArboRefD |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 4 weeks** |
| Size | 9 MB | 58 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 12+ | 4+ |
| Developer | [moraleda GmbH](https://appshunter.io/developer/1475263226) | [Frank Rinn](https://appshunter.io/developer/1832196562) |

## What reviewers say

### HSE 4.0

[App page](https://appshunter.io/ios/app/hse-40/id1475263227)

**Features:** macOS Compatibility

**In-app purchases:** none


### ArboRefD

[App page](https://appshunter.io/ios/app/arborefd/id6749804200)

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Day | $0.99 | one-time |
| 1-Day-Pass | $0.99 | one-time |
| 1-Week-Pass | $4.99 | one-time |
| Full version (Week) | $5.99 | one-time |
| Full version (Month) | $11.99 | one-time |
| 1-Month-Pass | $12.99 | one-time |
| Full version (Year) | $49.99 | one-time |
| 1-Year-Pass | $59.99 | one-time |


## Frequently asked questions

### Is HSE 4.0 free?

HSE 4.0 is free to download, with no in-app purchases.

### Is ArboRefD free?

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

### Do HSE 4.0 or ArboRefD have ads?

Neither HSE 4.0 nor ArboRefD shows ads.

### Which is updated more often, HSE 4.0 or ArboRefD?

HSE 4.0 ships an update every 8 months, and ArboRefD every 4 weeks. Most recently, HSE 4.0 was updated on May 16, 2026 and ArboRefD on September 22, 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.*