# EchoVis Game vs Mathematicus Parvus

The clearest difference is price: Mathematicus Parvus at Free against EchoVis Game's $1.99. EchoVis Game's advantage is in-app purchases (none vs 1) and iOS requirement (15.0 vs 17.0). On update cadence, ads and device support there is nothing between them.

Mathematicus Parvus is free to download; EchoVis Game costs $1.99 up front. Mathematicus Parvus sells 1 one-off in-app purchase. EchoVis Game asks for nothing beyond the download.

EchoVis Game ships an update every 3 months, Mathematicus Parvus every 6 months. The most recent releases landed on September 9, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | EchoVis Game | Mathematicus Parvus |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/echovis-game/id1377664103/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 6 months |
| Monetization | Paid | — |
| Size | 214 MB | 1 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Transition Technologies S.A.](https://appshunter.io/developer/388173587) | [Kristof Nijs](https://appshunter.io/developer/1608072573) |

## What reviewers say

### EchoVis Game

[App page](https://appshunter.io/ios/app/echovis-game/id1377664103)

This educational game enhances hearing skills through immersive audio environments and interactive challenges. Designed for visually impaired individuals, it also offers sighted users a unique way to develop auditory perception. Explore diverse levels and scenarios using only sound cues.

**Highlights:** Audio-based gameplay, Hearing skill development, Multiple game levels, Interactive scenarios, Speech synthesizer messages, Designed for visually impaired

**In-app purchases:** none


### Mathematicus Parvus

[App page](https://appshunter.io/ios/app/mathematicus-parvus/id1613162646)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Purchase of the app | $0.99 | one-time |


## Frequently asked questions

### Is EchoVis Game free?

EchoVis Game costs $1.99, with no in-app purchases.

### Is Mathematicus Parvus free?

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

### Do EchoVis Game or Mathematicus Parvus have ads?

Neither EchoVis Game nor Mathematicus Parvus shows ads.

### Which is updated more often, EchoVis Game or Mathematicus Parvus?

EchoVis Game ships an update every 3 months, and Mathematicus Parvus every 6 months. Most recently, EchoVis Game was updated on September 9, 2026 and Mathematicus Parvus on September 10, 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.*