# Erol Singer's Studio vs Federgraph

The clearest difference is in-app purchases: Federgraph at none against Erol Singer's Studio's 5. Federgraph also leads on iOS requirement (15.0 vs 17.0). Erol Singer's Studio's advantage is update cadence (every 6 weeks vs every 15 months). On price, ads and device support 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. Federgraph asks for nothing beyond the download.

Erol Singer's Studio ships an update every 6 weeks, Federgraph every 15 months. The most recent releases landed on November 6, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Erol Singer's Studio | Federgraph |
| --- | --- | --- |
| 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 | No |
| Update frequency | **Every 6 weeks** | Every 15 months |
| Monetization | Free with in-app purchases | — |
| Size | 108 MB | 29 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Erol Studios](https://appshunter.io/developer/502780529) | [Gustav Schubert](https://appshunter.io/developer/670940970) |

## 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


### Federgraph

[App page](https://appshunter.io/ios/app/federgraph/id670940947)

**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 Federgraph free?

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

### Do Erol Singer's Studio or Federgraph have ads?

Neither Erol Singer's Studio nor Federgraph shows ads.

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

Erol Singer's Studio ships an update every 6 weeks, and Federgraph every 15 months. Most recently, Erol Singer's Studio was updated on November 6, 2026 and Federgraph on October 26, 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.*