# Erol Singer's Studio vs Neg Multiply

The clearest difference is in-app purchases: Neg Multiply at none against Erol Singer's Studio's 5. Erol Singer's Studio's advantage is ads (none vs shown) and device support (3 vs 1). On price, update cadence and iOS requirement there is nothing between them.

Both are free to download. Erol Singer's Studio sells 5 in-app purchases, starting at $1.99 per 7 days. Neg Multiply asks for nothing beyond the download.

Erol Singer's Studio ships an update every 6 weeks, Neg Multiply every 5 weeks. The most recent releases landed on October 30, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Erol Singer's Studio | Neg Multiply |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (3.4K ratings)](https://appshunter.io/ios/app/erol-singers-studio/id502780186/reviews)** | — |
| Number of ratings | **3.4K** | — |
| Positive reviews | 85.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Every 5 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 108 MB | 32 MB |
| Requires iOS | 17.0 | **16.6** |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Erol Studios](https://appshunter.io/developer/502780529) | [Katsuhiko Yao](https://appshunter.io/developer/1543188534) |

## What reviewers say

### Erol Singer's Studio

[App page](https://appshunter.io/ios/app/erol-singers-studio/id502780186)

Learn to sing with structured lessons and advanced pitch tracking. This app provides techniques to improve vocal range, power, and clarity, preventing common singing mistakes. It's designed for all skill levels, from beginners to those seeking to refine their voice.

**Highlights:** Progressive vocal lessons, Super-smooth pitch tracking, Technique and sound training, Prevent common singing mistakes, Optional exercise editor, Award-winning coach designed

**Features:** Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Access | $1.99 | per 7 days |
| Add-ons for permanent licenses | $2.99 | per month |
| All Access | $6.99 | per month |
| Add-ons for permanent licenses | $24.99 | per year |
| All Access | $49.99 | per year |

**What reviewers like**

- 🚀 Excellent vocal training tool
- 👍 Intuitive and user-friendly interface
- 🎨 Visually appealing with clear feedback
- 💪 Helps improve vocal range and pitch
- 🎯 Accurate pitch detection and tracking

**What reviewers complain about**

- 💰 Subscription model can be expensive
- 🚫 Lack of Bluetooth headphone support
- 🤔 Unclear progression requirements
- 🔇 Lack of audio examples/demonstrations
- 🕰️ Exercises can feel repetitive over time

**Reported bugs**

- App crashes when using Bluetooth headphones
- Occasional loss of progress and purchased content

**Requested features**

- Add more exercise variety and song options
- Implement cloud sync and cross-device support
- Provide more customization options for exercises
- Include a metronome and tempo adjustment features
- Add community-created content and sharing


### Neg Multiply

[App page](https://appshunter.io/ios/app/neg-multiply-brain-training/id6450744705)

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

**In-app purchases:** none


## Frequently asked questions

### Is Erol Singer's Studio free?

Erol Singer's Studio is free to download, with in-app purchases available.

### Is Neg Multiply free?

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

### Do Erol Singer's Studio or Neg Multiply have ads?

Neg Multiply shows ads; Erol Singer's Studio does not.

### Which is updated more often, Erol Singer's Studio or Neg Multiply?

Erol Singer's Studio ships an update every 6 weeks, and Neg Multiply every 5 weeks. Most recently, Erol Singer's Studio was updated on October 30, 2026 and Neg Multiply on October 27, 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.*