# NDSR660A vs DSP

The clearest difference is iOS requirement: NDSR660A at 9.0 against DSP's 12.0. 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.

## The numbers

| Metric | NDSR660A | DSP |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Size | 3 MB | 18 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Guangzhou Aidan Blessindo Electronic Co.,Ltd.](https://appshunter.io/developer/1413008258) | [Dongguan Chord Audio Electronics Co., Ltd](https://appshunter.io/developer/1758660448) |

## What reviewers say

### NDSR660A

[App page](https://appshunter.io/ios/app/ndsr660a/id1623505586)

**Features:** macOS Compatibility

**In-app purchases:** none


### DSP

[App page](https://appshunter.io/ios/app/dsp-a6sa8sii/id6566173646)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is NDSR660A free?

NDSR660A is free to download, with no in-app purchases.

### Is DSP free?

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

### Do NDSR660A or DSP have ads?

Neither NDSR660A nor DSP shows ads.

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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.*