# EchoSketch vs STEM

The clearest difference is price: EchoSketch at $7.99 against STEM's $14.99. EchoSketch also leads on update cadence (every 2 days vs monthly) and iOS requirement (17 vs 26.0). On ads, in-app purchases and device support there is nothing between them.

EchoSketch costs $7.99 and STEM $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

EchoSketch ships an update every 2 days, STEM monthly. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | EchoSketch | STEM |
| --- | --- | --- |
| Price | **$7.99** | $14.99 |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/echosketch-performance-delay/id6794466741/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 days** | Monthly |
| Monetization | Paid | — |
| Size | 5 MB | 283 MB |
| Requires iOS | **17** | 26.0 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Avi Bortnick](https://appshunter.io/developer/421929037) | [Michael Ivertowski](https://appshunter.io/developer/6774757588) |

## What reviewers say

### EchoSketch

[App page](https://appshunter.io/ios/app/echosketch-performance-delay/id6794466741)

Shape delay and reverb effects in real-time with a playable X/Y performance surface. Explore four distinct delay types and multiple reverb options, with extensive parameter control for unique sound morphing. Works as a standalone app or an Audio Unit plugin.

**Highlights:** X/Y performance surface for real-time sound shaping, Four distinct delay types: digital, analog, reverse, ping-pong, Spring, plate, and hall convolution reverb, Modulation and tone control for echoes, HOLD, LIFT, FREEZE, and MOTION performance gestures, Standalone app and AUv3 plugin compatibility

**Features:** Vision Pro support

**In-app purchases:** none


### STEM

[App page](https://appshunter.io/ios/app/stem-live-stem-separation/id6808668529)

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

**In-app purchases:** none


## Frequently asked questions

### Is EchoSketch free?

EchoSketch costs $7.99, with no in-app purchases.

### Is STEM free?

STEM costs $14.99, with no in-app purchases.

### Do EchoSketch or STEM have ads?

Neither EchoSketch nor STEM shows ads.

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

EchoSketch ships an update every 2 days, and STEM monthly. Most recently, EchoSketch was updated on October 24, 2026 and STEM on October 29, 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.*