# STEM vs Sparsi

The clearest difference is in-app purchases: Sparsi at none against STEM's 6. Sparsi also leads on chart position (#209 vs unranked). STEM's advantage is update cadence (every 9 days vs every 6 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. STEM sells 6 in-app purchases, starting at $7.99 per month. Sparsi asks for nothing beyond the download.

STEM ships an update every 9 days, Sparsi every 6 weeks. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | STEM | Sparsi |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/sparsi/id6805579767/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 6 weeks |
| Best chart rank | — | **#209** |
| Size | 3 MB | 45 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [CEM OZAN DUZENCI](https://appshunter.io/developer/6782101402) | [Ceyaz LANAR](https://appshunter.io/developer/6805579769) |

## What reviewers say

### 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 |


### Sparsi

[App page](https://appshunter.io/ios/app/sparsi/id6805579767)

**Currently charting:** #209 Top Free · Music (US App Store)

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

**In-app purchases:** none


## Frequently asked questions

### Is STEM free?

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

### Is Sparsi free?

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

### Do STEM or Sparsi have ads?

Neither STEM nor Sparsi shows ads.

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

STEM ships an update every 9 days, and Sparsi every 6 weeks. Most recently, STEM was updated on October 25, 2026 and Sparsi on October 24, 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.*