# IHSIM vs Modal Math

The clearest difference is rating: Modal Math at 5.0 against IHSIM's 3.0. IHSIM's advantage is in-app purchases (none vs 2) and iOS requirement (9.3 vs 15.1). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Modal Math sells 2 in-app purchases, starting at $24.99 per month. IHSIM asks for nothing beyond the download.

Modal Math holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 3 and 2 respectively.

IHSIM ships an update monthly, Modal Math every 5 weeks. The most recent releases landed on September 29, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | IHSIM | Modal Math |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (3 ratings)](https://appshunter.io/ios/app/ihsim/id1421965944/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/modal-math/id6469200381/reviews)** |
| Number of ratings | **3** | 2 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 5 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 5 MB | 75 MB |
| Requires iOS | **9.3** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hack Audio LLC](https://appshunter.io/developer/1276914003) | [Asledu LLC](https://appshunter.io/developer/1711677950) |

## What reviewers say

### IHSIM

[App page](https://appshunter.io/ios/app/ihsim/id1421965944)

This application simulates acoustic hearing loss and cochlear implant processing in real-time. It allows for custom spectral filtering based on audiograms and offers various cochlear implant simulation parameters. Designed for research and education, it helps users understand auditory perception.

**Highlights:** Acoustic hearing loss simulation, Cochlear implant simulation, Custom spectral filtering, Filterbank vocoder, Binaural stimulation options, Research and educational use

**Features:** macOS Compatibility

**In-app purchases:** none


### Modal Math

[App page](https://appshunter.io/ios/app/modal-math/id6469200381)

This app provides accessible math practice designed by teachers for students with special language needs. It focuses on fostering conceptual understanding and reinforcing mathematical language for diverse learners.

**Highlights:** Designed by teachers, Accessible for special language needs, Fosters conceptual understanding, Reinforces mathematical language, Supports diverse learning needs

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Classroom Membership | $24.99 | per month |
| DHH Teacher Resources | $6.99 | one-time |


## Frequently asked questions

### Is IHSIM free?

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

### Is Modal Math free?

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

### Which has better reviews, IHSIM or Modal Math?

Modal Math is rated higher. IHSIM averages 3.0 out of 5 from 3 ratings, while Modal Math averages 5.0 from 2 ratings.

### Do IHSIM or Modal Math have ads?

Neither IHSIM nor Modal Math shows ads.

### Which is updated more often, IHSIM or Modal Math?

IHSIM ships an update monthly, and Modal Math every 5 weeks. Most recently, IHSIM was updated on September 29, 2026 and Modal Math on October 8, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*