# AcoustaLab vs ColdStart

The clearest difference is update cadence: ColdStart at daily against AcoustaLab's every 9 days. AcoustaLab's advantage is iOS requirement (17.0 vs 26.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. AcoustaLab sells 3 in-app purchases, starting at $0.99 per month and ColdStart sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

AcoustaLab ships an update every 9 days, ColdStart daily. The most recent releases landed on October 6, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | AcoustaLab | ColdStart |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 9 days | **Daily** |
| Size | 4 MB | 39 MB |
| Requires iOS | **17.0** | 26.1 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [QINGDAO XUFAN ZHILIAN INFORMATION TECHNOLOGY CO. LTD.](https://appshunter.io/developer/1888657658) | [Mehmet Cakmaz](https://appshunter.io/developer/6772245895) |

## What reviewers say

### 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 | $0.99 | per month |
| Yearly Pro | $4.99 | per year |
| Lifetime Unlock | $9.99 | one-time |


### ColdStart

[App page](https://appshunter.io/ios/app/coldstart-engine-alarm-clock/id6787444544)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Car Engines | $6.99 | one-time |


## Frequently asked questions

### Is AcoustaLab free?

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

### Is ColdStart free?

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

### Do AcoustaLab or ColdStart have ads?

Neither AcoustaLab nor ColdStart shows ads.

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

AcoustaLab ships an update every 9 days, and ColdStart daily. Most recently, AcoustaLab was updated on October 6, 2026 and ColdStart on October 9, 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.*