# Nucleus Smart vs AudioKey 2

The clearest difference is rating: AudioKey 2 at 5.0 against Nucleus Smart's 3.0. AudioKey 2 also leads on monetization model (free vs free with in-app purchases) and iOS requirement (15.0 vs 18.0). Nucleus Smart's advantage is ratings volume (736 vs 1) and review sentiment (27% vs 11%). On price, update cadence, ads and in-app purchases there is nothing between them.

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

AudioKey 2 holds the better App Store score, 5.0 against 3.0. That said, the two scores are not equally well evidenced: Nucleus Smart has 736 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 27% of Nucleus Smart's written reviews are positive against 11% of AudioKey 2's, so the app with the better star average is not the one people write more warmly about.

Nucleus Smart ships an update every 2 months, AudioKey 2 every 4 months. The most recent releases landed on October 17, 2026 and July 7, 2026 respectively.

## The numbers

| Metric | Nucleus Smart | AudioKey 2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (736 ratings)](https://appshunter.io/ios/app/nucleus-smart/id1210236531/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/audiokey-2/id1522269848/reviews)** |
| Number of ratings | **736** | 1 |
| Positive reviews | **26.9% of reviews** | 11.1% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 225 MB | 243 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Cochlear Limited](https://appshunter.io/developer/489503787) | [MED-EL Elektromedizinische Geraete GmbH](https://appshunter.io/developer/455935145) |

## What reviewers say

### Nucleus Smart

[App page](https://appshunter.io/ios/app/nucleus-smart/id1210236531)

This app allows users to control their hearing sound processor directly from a mobile device. Adjust volume, treble, bass, and sensitivity settings, and stream audio wirelessly. It also helps locate lost devices and monitor battery levels and usage statistics.

**Highlights:** Control sound processor settings, Activate wireless streaming, Adjust volume, treble, bass, sensitivity, Locate lost sound processor, View processor status and battery, Track usage statistics

**Features:** Apple Watch app

**In-app purchases:** none

**What reviewers like**

- 🚀 Easy to use
- 👍 Convenient Bluetooth connectivity
- 🎧 Excellent audio streaming
- 💡 Useful features like 'Find My Processor'

**What reviewers complain about**

- 🐛 Frequent connectivity issues
- 🔁 Unstable app performance after updates
- 🔋 Inaccurate battery level reporting
- 🤔 Limited functionality compared to expectations

**Reported bugs**

- App freezes or fails to detect processors
- Streaming audio issues and unexpected disconnections
- Settings changes not persisting after app restarts

**Requested features**

- Apple Watch support
- Ability to save custom settings
- Improved Bluetooth range and stability
- Parental controls for shared devices


### AudioKey 2

[App page](https://appshunter.io/ios/app/audiokey-2/id1522269848)

This app functions as a remote control for compatible MED-EL audio processors, allowing users to customize settings and check usage statistics. Caregivers can also utilize its features to support others, and it includes a tool to help locate misplaced devices.

**Highlights:** Remote control for audio processors, Customize personal settings, Find My Processor functionality, Check usage statistics, Access support material, Configure AudioStream device

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Nucleus Smart free?

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

### Is AudioKey 2 free?

AudioKey 2 is free to download, with no in-app purchases.

### Which has better reviews, Nucleus Smart or AudioKey 2?

AudioKey 2 is rated higher. Nucleus Smart averages 3.0 out of 5 from 736 ratings, while AudioKey 2 averages 5.0 from 1 ratings.

### Do Nucleus Smart or AudioKey 2 have ads?

Neither Nucleus Smart nor AudioKey 2 shows ads.

### Which is updated more often, Nucleus Smart or AudioKey 2?

Nucleus Smart ships an update every 2 months, and AudioKey 2 every 4 months. Most recently, Nucleus Smart was updated on October 17, 2026 and AudioKey 2 on July 7, 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.*