Devialet Gemini vs Harman Kardon One
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Devialet Gemini
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.
- 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
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Take full control of your earbuds with Devialet Gemini dedicated app. Discover the Devialet Gemini range (Devialet Gemini and Devialet Gemini II). • Pair your earbuds to your device via Bluetooth and link it to your account. • Choose the best eartips for an optimal listening experience. Meet a new generation of earbuds with Devialet Gemini II. • Choose what's best for any situation between Active noise cancellation and Transparency modes. • Reset the touch controls, customize each interaction. • Enjoy a 6-band equalizer with presets to listen to your music the way you like. Stay up to date with the latest software and firmware updates for your product.
Harman Kardon One
Easily set up and control your Harman Kardon speakers and soundbars. Personalize EQ settings, lighting, and music playback. Stream music from integrated services and manage all your devices in one place.
- Step-by-step setup guidance
- Customizable EQ settings
- Personalize speaker lighting
- Manage all connected devices
- Integrated music player
- Access music streaming services
- Stereo pairing and multi-channel grouping
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The official app for setting up and controlling Harman Kardon speakers and soundbars. Connect to Wi-Fi, customize EQ and control your compatible device with a single convenient app. The Harman Kardon One app helps you to easily set up the devices, personalize settings, and use the integrated music services to enjoy your favorite songs. Features: - Breeze through setup with step-by-step guidance. - Customize speaker and soundbar EQ setting. - Personalize your speaker’s lighting to effortlessly match your mood, music, or space.* - Manage all your devices and check their connection status, playback content etc. all at a glance. - Personalize your music experience, save favorite playlists or ambient sounds for quick and easy access.* - Control music playback from the integrated music player. - Access a variety of music streaming services, Internet radio, and podcasts in high definition.* - Stereo pair or group your speakers into a multi-channel system for elevated listening experience. - Wirelessly connect multiple speakers to create a louder party. - Keep device software updated, to enjoy the latest features. - Get product support. * Feature availability depends on product model.
Screenshots
Verdict
The clearest difference is review sentiment: Devialet Gemini at 57% against Harman Kardon One's 39%. Devialet Gemini also leads on iOS requirement (13.0 vs 16). Harman Kardon One's advantage is rating (4.8 vs 4.6). On price, ratings volume, update cadence and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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 934 respectively. Written reviews complicate that: 57% of Devialet Gemini's written reviews are positive against 39% 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 September 25, 2026 and September 26, 2026 respectively.
| Parameter | Devialet Gemini | Harman Kardon One |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (1.4K ratings) | 4.8 (934 ratings) — better |
| Positive reviews | 57.1% of reviews — better | 39.0% of reviews |
| Number of ratings | 1.4K — better | 934 |
| Update frequency | Every 3 months | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 13.0 — better | 16 |
| Further details — not scored | ||
| Size | 85 MB | 243 MB |
| Age rating | 4+ | 4+ |
| Developer | Devialet | Harman International Industries |
Customer experience
Devialet Gemini
Harman Kardon One
Bugs and requests
Devialet Gemini
Reported bugs
5 issues- 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
5 requests- 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
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Devialet Gemini
No in-app purchases
Harman Kardon One
No in-app purchases
Questions
Is Devialet Gemini free?
Is Harman Kardon One free?
Which has better reviews, Devialet Gemini or Harman Kardon One?
Do Devialet Gemini or Harman Kardon One have ads?
Which is updated more often, Devialet Gemini or Harman Kardon One?
Other comparisons
