# HB Auditory Memory vs Co

The clearest difference is review sentiment: HB Auditory Memory at 64% against Co's 8%. HB Auditory Memory also leads on rating (3.6 vs 2.6). Co's advantage is iOS requirement (10.0 vs 15.0). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

HB Auditory Memory holds the better App Store score, 3.6 against 2.6. Both are backed by a comparable volume of ratings — 35 and 17 respectively. Written reviews point the same way: 64% of HB Auditory Memory's written reviews are positive against 8% of Co's.

HB Auditory Memory ships an update every 3 months, Co every 4 months. The most recent releases landed on October 31, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | HB Auditory Memory | Co |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (35 ratings)](https://appshunter.io/ios/app/hb-auditory-memory/id791651270/reviews)** | [2.6 (17 ratings)](https://appshunter.io/ios/app/cowriter-universal/id915105799/reviews) |
| Number of ratings | **35** | 17 |
| Positive reviews | **63.6% of reviews** | 8.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | Free | Free |
| Size | 242 MB | 45 MB |
| Requires iOS | 15.0 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Super Duper Publications](https://appshunter.io/developer/427263142) | [Don Johnston Incorporated](https://appshunter.io/developer/674099735) |

## 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

**In-app purchases:** none


### Co

[App page](https://appshunter.io/ios/app/cowriter-universal/id915105799)

This app provides advanced word prediction and spelling support for students. It offers grammar-smart suggestions and access to millions of topic-specific dictionaries to aid in writing. Built-in text-to-speech functionality helps users review their work.

**Highlights:** Grammar-smart word prediction, Millions of topic-specific dictionaries, Flexspell™ technology for spelling errors, Built-in text-to-speech, Personalized vocabulary and settings

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is HB Auditory Memory free?

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

### Is Co free?

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

### Which has better reviews, HB Auditory Memory or Co?

HB Auditory Memory is rated higher. HB Auditory Memory averages 3.6 out of 5 from 35 ratings, while Co averages 2.6 from 17 ratings.

### Do HB Auditory Memory or Co have ads?

Neither HB Auditory Memory nor Co shows ads.

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

HB Auditory Memory ships an update every 3 months, and Co every 4 months. Most recently, HB Auditory Memory was updated on October 31, 2026 and Co on October 29, 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.*