# SampleHook vs STEM

The clearest difference is update cadence: STEM at every 9 days against SampleHook's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. SampleHook sells 2 in-app purchases, starting at $12.99 per month and STEM sells 6 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

SampleHook ships an update every 3 weeks, STEM every 9 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | SampleHook | STEM |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Size | 3 MB | 3 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Jester Agustin](https://appshunter.io/developer/1894936544) | [CEM OZAN DUZENCI](https://appshunter.io/developer/6782101402) |

## What reviewers say

### SampleHook

[App page](https://appshunter.io/ios/app/samplehook-ai-vocals/id6770707654)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SampleHook Pro Monthly | $12.99 | per month |
| SampleHook Pro Annual | $99.99 | per year |


### STEM

[App page](https://appshunter.io/ios/app/stem-x-vocal-isolation/id6791375004)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Starter Monthly | $7.99 | per month |
| Basic Plan | $12.99 | per month |
| Pro Plan | $24.99 | per month |
| Basic Plan | $99.99 | per year |
| Pro Plan | $199.99 | per year |
| Energy Token | $4.99 | one-time |


## Frequently asked questions

### Is SampleHook free?

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

### Is STEM free?

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

### Do SampleHook or STEM have ads?

Neither SampleHook nor STEM shows ads.

### Which is updated more often, SampleHook or STEM?

SampleHook ships an update every 3 weeks, and STEM every 9 days. Most recently, SampleHook was updated on October 31, 2026 and STEM on October 31, 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.*