# EchoVis Street vs Mathematicus Parvus

The clearest difference is iOS requirement: EchoVis Street at 15.0 against Mathematicus Parvus's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. EchoVis Street sells 3 one-off in-app purchases and Mathematicus Parvus sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | EchoVis Street | Mathematicus Parvus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (2 ratings)](https://appshunter.io/ios/app/echovis-street/id1440588932/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | Every 4 months |
| Monetization | Free with in-app purchases | — |
| Size | 197 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 Street

[App page](https://appshunter.io/ios/app/echovis-street/id1440588932)

An audio-based game designed to enhance hearing skills, particularly for visually impaired individuals. Players navigate virtual environments by analyzing traffic sounds to avoid obstacles. It can also serve as an educational tool for understanding the blind perspective.

**Highlights:** Audio-based gameplay, Traffic sound simulation, Virtual road crossing challenges, Text-to-speech integration, Educational tool for spatial orientation, Multiple game levels

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small payment | $0.99 | one-time |
| Medium Payment | $2.99 | one-time |
| Large payment | $4.99 | one-time |


### 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 Street free?

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

### Is Mathematicus Parvus free?

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

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

Neither EchoVis Street nor Mathematicus Parvus shows ads.

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

EchoVis Street ships an update every 4 months, and Mathematicus Parvus every 4 months. Most recently, EchoVis Street was updated on November 2, 2026 and Mathematicus Parvus on November 3, 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.*