# DL4D vs AcoustaLab

The clearest difference is in-app purchases: DL4D at none against AcoustaLab's 3. DL4D also leads on iOS requirement (13.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. AcoustaLab sells 3 in-app purchases, starting at $1.99 per month. DL4D asks for nothing beyond the download.

DL4D ships an update every 11 days, AcoustaLab every 9 days. The most recent releases landed on October 16, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | DL4D | AcoustaLab |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 days | **Every 9 days** |
| Size | 27 MB | 5 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [显强 余](https://appshunter.io/developer/1862084532) | [QINGDAO XUFAN ZHILIAN INFORMATION TECHNOLOGY CO. LTD.](https://appshunter.io/developer/1888657658) |

## What reviewers say

### DL4D

[App page](https://appshunter.io/ios/app/dl4d/id6756648259)

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

**In-app purchases:** none


### AcoustaLab

[App page](https://appshunter.io/ios/app/acoustalab-tone-generator/id6763583795)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro | $1.99 | per month |
| Yearly Pro | $9.99 | per year |
| Lifetime Unlock | $19.99 | one-time |


## Frequently asked questions

### Is DL4D free?

DL4D is free to download, with no in-app purchases.

### Is AcoustaLab free?

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

### Do DL4D or AcoustaLab have ads?

Neither DL4D nor AcoustaLab shows ads.

### Which is updated more often, DL4D or AcoustaLab?

DL4D ships an update every 11 days, and AcoustaLab every 9 days. Most recently, DL4D was updated on October 16, 2026 and AcoustaLab on October 28, 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.*