# NDS4615AU vs HARMONY DSP

The clearest difference is update cadence: NDS4615AU at every 2 days against HARMONY DSP's every 19 months. NDS4615AU also leads on iOS requirement (9.0 vs 11.0). 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.

NDS4615AU ships an update every 2 days, HARMONY DSP every 19 months. The most recent releases landed on October 25, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | NDS4615AU | HARMONY DSP |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 19 months |
| Size | 53 MB | 3 MB |
| Requires iOS | **9.0** | 11.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Guangzhou Aidan Blessindo Electronic Co.,Ltd.](https://appshunter.io/developer/1413008258) | [APEX Italy](https://appshunter.io/developer/1446565085) |

## What reviewers say

### NDS4615AU

[App page](https://appshunter.io/ios/app/nds4615au/id1556188644)

**Features:** macOS Compatibility

**In-app purchases:** none


### HARMONY DSP

[App page](https://appshunter.io/ios/app/harmony-dsp/id1638244924)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is NDS4615AU free?

NDS4615AU is free to download, with no in-app purchases.

### Is HARMONY DSP free?

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

### Do NDS4615AU or HARMONY DSP have ads?

Neither NDS4615AU nor HARMONY DSP shows ads.

### Which is updated more often, NDS4615AU or HARMONY DSP?

NDS4615AU ships an update every 2 days, and HARMONY DSP every 19 months. Most recently, NDS4615AU was updated on October 25, 2026 and HARMONY DSP on November 3, 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.*