# Devialet Gemini vs Harman Kardon One

Devialet Gemini and Harman Kardon One both sit at 4.6 stars, but that hides the real split: 57% of Devialet Gemini's written reviews are positive against 36% of Harman Kardon One's. Devialet Gemini also leads on iOS requirement (13.0 vs 16). On price, rating, ratings volume and update cadence there is nothing between them.

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

Harman Kardon One holds the better App Store score, 4.8 against 4.6. Both are backed by a comparable volume of ratings — 1.4K and 1.1K respectively. Written reviews complicate that: 57% of Devialet Gemini's written reviews are positive against 36% of Harman Kardon One's, so the app with the better star average is not the one people write more warmly about.

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

## The numbers

| Metric | Devialet Gemini | Harman Kardon One |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (1.4K ratings)](https://appshunter.io/ios/app/devialet-gemini/id1498489424/reviews) | **[4.8 (1.1K ratings)](https://appshunter.io/ios/app/harman-kardon-one/id1626444106/reviews)** |
| Number of ratings | **1.4K** | 1.1K |
| Positive reviews | **56.8% of reviews** | 36.2% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Free | Free |
| Size | 85 MB | 261 MB |
| Requires iOS | **13.0** | 16 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Devialet](https://appshunter.io/developer/531633179) | [Harman International Industries](https://appshunter.io/developer/419840205) |

## What reviewers say

### Devialet Gemini

[App page](https://appshunter.io/ios/app/devialet-gemini/id1498489424)

Enhance your listening experience with this app designed for advanced control of your earbuds. Customize audio settings, manage noise cancellation, and update your device's firmware for optimal performance.

**Highlights:** Bluetooth pairing and account linking, Eartip selection for optimal fit, Active noise cancellation and transparency modes, Customizable touch controls, 6-band equalizer with presets, Software and firmware updates

**In-app purchases:** none

**What reviewers like**

- 🎧 Exceptional sound quality
- 🔇 Effective noise cancellation
- 🔋 Long battery life
- 🤳 Comfortable and secure fit
- 📱 Intuitive app with customization options

**What reviewers complain about**

- 🐛 Connectivity issues and pairing problems
- 🔋 Inconsistent battery reporting
- 🔧 Buggy firmware and app updates
- 🤖 Unreliable voice controls
- 🔒 Poor customer support

**Reported bugs**

- Earbuds draining battery while in case
- One earbud frequently losing connection
- Firmware update failures
- App crashes and freezes
- Inconsistent volume and noise cancellation behavior

**Requested features**

- More EQ presets and customization options
- Ability to save custom EQ settings
- Neutral listening mode (no ANC/transparency)
- Improved Bluetooth connection stability
- Better integration between app and device


### Harman Kardon One

[App page](https://appshunter.io/ios/app/harman-kardon-one/id1626444106)

Easily set up and control your Harman Kardon speakers and soundbars. Customize EQ settings, personalize lighting, and manage all your devices from one place. Enjoy integrated music services, internet radio, and podcasts.

**Highlights:** Step-by-step device setup, Customizable EQ settings, Personalize speaker lighting, Manage all connected devices, Integrated music player, Access streaming services and radio, Stereo pairing and multi-channel systems

**In-app purchases:** none


## Frequently asked questions

### Is Devialet Gemini free?

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

### Is Harman Kardon One free?

Harman Kardon One is free to download, with no in-app purchases.

### Which has better reviews, Devialet Gemini or Harman Kardon One?

Harman Kardon One is rated higher. Devialet Gemini averages 4.6 out of 5 from 1.4K ratings, while Harman Kardon One averages 4.8 from 1.1K ratings.

### Do Devialet Gemini or Harman Kardon One have ads?

Neither Devialet Gemini nor Harman Kardon One shows ads.

### Which is updated more often, Devialet Gemini or Harman Kardon One?

Devialet Gemini ships an update every 3 months, and Harman Kardon One every 3 months. Most recently, Devialet Gemini was updated on November 3, 2026 and Harman Kardon One on November 4, 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.*