# HB Auditory Memory vs Inference Ace

The clearest difference is in-app purchases: HB Auditory Memory at none against Inference Ace's 3. HB Auditory Memory also leads on update cadence (every 3 months vs every 7 months). Inference Ace's advantage is review sentiment (89% vs 64%) and iOS requirement (12.2 vs 15.0). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Inference Ace sells 3 one-off in-app purchases. HB Auditory Memory asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 3.6 for HB Auditory Memory against 3.6 for Inference Ace. Both are backed by a comparable volume of ratings — 35 and 21 respectively. Written reviews are what separate them: 64% of HB Auditory Memory's written reviews are positive against 89% of Inference Ace's.

HB Auditory Memory ships an update every 3 months, Inference Ace every 7 months. The most recent releases landed on September 16, 2026 and June 9, 2026 respectively.

## The numbers

| Metric | HB Auditory Memory | Inference Ace |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.6 (35 ratings)](https://appshunter.io/ios/app/hb-auditory-memory/id791651270/reviews) | [3.6 (21 ratings)](https://appshunter.io/ios/app/inference-ace/id866920724/reviews) |
| Number of ratings | **35** | 21 |
| Positive reviews | 63.6% of reviews | **88.6% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 7 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 242 MB | 22 MB |
| Requires iOS | 15.0 | **12.2** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Super Duper, Inc.](https://appshunter.io/developer/427263142) | [Janine Toole](https://appshunter.io/developer/839832427) |

## What reviewers say

### HB Auditory Memory

[App page](https://appshunter.io/ios/app/hb-auditory-memory/id791651270)

This educational app helps students improve auditory memory, closure, and comprehension skills through engaging, multi-level missions. Players assist characters in saving MemoryTown from a forgetful villain by completing various listening activities.

**Highlights:** Auditory memory training, Auditory closure exercises, Comprehension skill development, Memory for Numbers, Memory for Words, Memory for Details, Auditory Closure, Memory for WH Information

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

**In-app purchases:** none


### Inference Ace

[App page](https://appshunter.io/ios/app/inference-ace/id866920724)

This app helps children in grades 2-5 improve their reading comprehension by teaching inference skills step-by-step. It uses a game-like environment with over 450 examples and a reward center to keep kids engaged. Detailed reporting is available for up to 10 students.

**Highlights:** Step-by-step inference skill building, Game-like environment with reward center, Over 450 examples designed by teachers, Detailed reporting for multiple students, Incremental learning with unlocked levels, Guided learning for reduced frustration

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to 2 Players | $1.99 | one-time |
| Inference Ace: Buy All Levels | $2.99 | one-time |
| Upgrade to 10 Players | $2.99 | one-time |


## Frequently asked questions

### Is HB Auditory Memory free?

HB Auditory Memory is free to download, with no in-app purchases.

### Is Inference Ace free?

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

### Which has better reviews, HB Auditory Memory or Inference Ace?

HB Auditory Memory and Inference Ace are both rated 3.6 out of 5 on the App Store, from 35 and 21 ratings respectively.

### Do HB Auditory Memory or Inference Ace have ads?

Neither HB Auditory Memory nor Inference Ace shows ads.

### Which is updated more often, HB Auditory Memory or Inference Ace?

HB Auditory Memory ships an update every 3 months, and Inference Ace every 7 months. Most recently, HB Auditory Memory was updated on September 16, 2026 and Inference Ace on June 9, 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.*