# CZI Sound vs LASM

The clearest difference is update cadence: LASM at every 2 months against CZI Sound's every 8 months. CZI Sound's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.6). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CZI Sound ships an update every 8 months, LASM every 2 months. The most recent releases landed on October 5, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | CZI Sound | LASM |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 2 months** |
| Size | 64 MB | 6 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Guangzhou Chengzhi Intelligent Machine Technology Co., Ltd.](https://appshunter.io/developer/1675437495) | [Shanghai Terjin Information Technology Co., Ltd.](https://appshunter.io/developer/649957877) |

## What reviewers say

### CZI Sound

[App page](https://appshunter.io/ios/app/czi-sound/id6446013579)

**Features:** macOS Compatibility

**In-app purchases:** none


### LASM

[App page](https://appshunter.io/ios/app/lasm/id6762499364)

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

**In-app purchases:** none


## Frequently asked questions

### Is CZI Sound free?

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

### Is LASM free?

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

### Do CZI Sound or LASM have ads?

Neither CZI Sound nor LASM shows ads.

### Which is updated more often, CZI Sound or LASM?

CZI Sound ships an update every 8 months, and LASM every 2 months. Most recently, CZI Sound was updated on October 5, 2026 and LASM on September 26, 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.*