# Stem Split vs SUS4 Loop Builder

The clearest difference is update cadence: Stem Split at every 8 days against SUS4 Loop Builder's monthly. Stem Split also leads on chart position (#149 vs unranked). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Stem Split sells 11 in-app purchases, starting at $6.99 per 7 days and SUS4 Loop Builder sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Stem Split ships an update every 8 days, SUS4 Loop Builder monthly. The most recent releases landed on October 15, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Stem Split | SUS4 Loop Builder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (1.3K ratings)](https://appshunter.io/ios/app/stem-split-ai-vocal-remover/id6742150522/reviews)** | — |
| Number of ratings | **1.3K** | — |
| Positive reviews | 28.8% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 8 days** | Monthly |
| Monetization | Free with in-app purchases | — |
| Best chart rank | **#149** | — |
| Size | 150 MB | 20 MB |
| Requires iOS | 16.4 | **16.0** |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Music AI Studio](https://appshunter.io/developer/1796160577) | [Paul Smith](https://appshunter.io/developer/319584506) |

## What reviewers say

### Stem Split

[App page](https://appshunter.io/ios/app/stem-split-ai-vocal-remover/id6742150522)

**Currently charting:** #149 Top Grossing · Music, #193 Top Free · Music (US App Store)

This app uses AI to instantly separate any song into its individual instrumental and vocal components. It's designed for musicians to isolate specific parts for practice, remixing, or study, offering clean and precise stem extraction.

**Highlights:** AI vocal remover, Music separator, Instrument separator, Audio splitter, Karaoke version creator, Stem export

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

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly subscription | $6.99 | per 7 days |
| Weekly Subscription | $6.99 | per 7 days |
| Weekly Subscription | $9.99 | per 7 days |
| Year Subscription | $19.99 | per year |
| Monthly Subscription | $19.99 | per month |
| Yearly subscription | $39.99 | per year |
| Yearly subscription | $49.99 | per year |
| Lifetime | $19.99 | one-time |
| Lifetime Offer | $44.99 | one-time |
| Lifetime 20% off | $59.99 | one-time |
| Lifetime Access | $69.99 | one-time |


### SUS4 Loop Builder

[App page](https://appshunter.io/ios/app/sus4-loop-builder-looper/id6777230284)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SUS4 Loop Builder Pro Monthly | $0.99 | per month |
| SUS4 All-Access | $4.99 | per month |


## Frequently asked questions

### Is Stem Split free?

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

### Is SUS4 Loop Builder free?

SUS4 Loop Builder is free to download, with in-app purchases available.

### Do Stem Split or SUS4 Loop Builder have ads?

Neither Stem Split nor SUS4 Loop Builder shows ads.

### Which is updated more often, Stem Split or SUS4 Loop Builder?

Stem Split ships an update every 8 days, and SUS4 Loop Builder monthly. Most recently, Stem Split was updated on October 15, 2026 and SUS4 Loop Builder on October 12, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*