# Semivowels vs Quantum

The clearest difference is review sentiment: Quantum at 81% against Semivowels's 0%. Quantum also leads on price (Free vs $4.99) and rating (4.8 vs 2.5). Semivowels's advantage is in-app purchases (none vs 6) and iOS requirement (12.0 vs 26.0). On ads and device support there is nothing between them.

Quantum is free to download; Semivowels costs $4.99 up front. Quantum sells 3 one-off in-app purchases. Semivowels asks for nothing beyond the download.

Quantum holds the better App Store score, 4.8 against 2.5. That said, the two scores are not equally well evidenced: Quantum has 150 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 0% of Semivowels's written reviews are positive against 81% of Quantum's.

Semivowels ships an update every 37 months, Quantum every 5 weeks. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Semivowels | Quantum |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [2.5 (2 ratings)](https://appshunter.io/ios/app/semivowels/id779096748/reviews) | **[4.8 (150 ratings)](https://appshunter.io/ios/app/quantum-particle-life/id6504465371/reviews)** |
| Number of ratings | 2 | **150** |
| Positive reviews | 0.0% of reviews | **81.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 37 months | **Every 5 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 37 MB | 32 MB |
| Requires iOS | **12.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Blue Tree Publishing, Inc.](https://appshunter.io/developer/496143325) | [GEORGY OSTROBROD](https://appshunter.io/developer/1875865758) |

## What reviewers say

### Semivowels

[App page](https://appshunter.io/ios/app/semivowels/id779096748)

This app offers dynamic animations and interactive anatomy views to illustrate the production of American English consonants. It includes detailed explanations of tongue placement and jaw movements, with synchronized audio and a drawing whiteboard for annotation. Designed for professionals and educators, it aids in understanding speech articulation.

**Highlights:** Dynamic consonant animations, Interactive anatomy identification, Tongue shape and placement views, Synchronized audio examples, Drawing whiteboard feature, Screenshot functionality

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

**In-app purchases:** none


### Quantum

[App page](https://appshunter.io/ios/app/quantum-particle-life/id6504465371)

Explore the hidden world of particles with a real-time simulator. Model up to 10,000 particles and experiment with natural phenomena like crystallization and orbital mechanics. Customize interactions and visualize results dynamically.

**Highlights:** Real-time particle simulation, Model up to 10,000 particles, Simulate natural phenomena, Four distinct particle classes, Customizable rules editor, Dynamic visualizations, Interactive control

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Developer tip | $1.99 | one-time |
| Developer tip | $3.99 | one-time |
| Developer tip | $5.99 | one-time |


## Frequently asked questions

### Is Semivowels free?

Semivowels costs $4.99, with no in-app purchases.

### Is Quantum free?

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

### Which has better reviews, Semivowels or Quantum?

Quantum is rated higher. Semivowels averages 2.5 out of 5 from 2 ratings, while Quantum averages 4.8 from 150 ratings.

### Do Semivowels or Quantum have ads?

Neither Semivowels nor Quantum shows ads.

### Which is updated more often, Semivowels or Quantum?

Semivowels ships an update every 37 months, and Quantum every 5 weeks. Most recently, Semivowels was updated on October 23, 2026 and Quantum 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.*