# EarStudio > Remote control for Radosone EarStudio Bluetooth audio receiver hardware. (iPhone/iPad app by RADSONE Inc..) - Source: https://appshunter.io/ios/app/earstudio/id1251399971 (this page in markdown: same URL + `.md`) - Developer: [RADSONE Inc.](https://appshunter.io/developer/450450163) - Category: Music, Music, Entertainment - Price: Free - Rating: 4.54/5 from 46 App Store ratings · 21 written reviews indexed - Age rating: 4+ - Requires: iOS 8.0 · 13 MB - Languages: English, Japanese, Korean - Released: 2017-07-10 - Data updated: 2026-06-10 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/earstudio/id1251399971/reviews.md ## What is EarStudio? * CAUTION: This App is a remote control application for Radosone's EarStudio (Bluetooth Receiver) H/W device. FEATURES - Displays name, version, battery status, playback information and many others of the EarStudio device. - Detail sound control for EarStudio such as Analog volume, DAC Digital filter and DAC Over sampling rate. USAGE - When you first run the app, you need to perform 'Device Search' first. The Device Search menu can be viewed by clicking the menu button at the top left of the window. REQUIREMENTS - iOS: 8.0 or over LATEST NEWS - Like us on Facebook: http://www.facebook.com/radsoneinc - Follow us on Twitter: http://www.twitter.com/radsoneinc ## Key features - Device status monitoring - Playback information display - Analog volume control - DAC Digital filter adjustment - DAC Over sampling rate control ## Recent user reviews (10 of 21) All indexed reviews: https://appshunter.io/ios/app/earstudio/id1251399971/reviews.md ### 1/5 — Does not work on iPhone15 *2024-10-28* Fails to work on iPhone. I used to rely on this device but now iPhone Bluetooth will not connect it and when it connects within the earstudio app, both Spotify and Apple Music simply continue to go through the phone speaker and not the headphones connected to the Earstudio device. It’s rubbish ☹️ ### 1/5 — No longer supported *2022-06-19, version 1.9.1* Word has it the main engineer left Radsone and started a new company (Qudelix) with much better offerings than the ES100 amp/DAC and EarStudio app. ### 1/5 — No iOS 15 support *2022-03-14, version 1.9.1* The es100 mk2 Bluetooth device works with iOS 15 but the app does absolutely nothing. It doesn’t show the device as being powered on and no of the features of the app do anything. Seeing the app hasn’t been updated in a few years it’s doubtful that any further development is being considered. ### 5/5 — Great device - the app is a nice bonus *2021-11-27, version 1.9.1* Just got a pair of iems and a relatively low ambience pair of headphones. This little thing is perfect for them. ### 1/5 — If only it worked *2020-10-21* Paired with the Ear Studio from the same manufacturer this App... fails to connect all the time. Randomly works and without anything changed on my iPhone stops connecting, is unable to recognise any device, let alone connects with one. Support is amicable enough but stops responding after first email in which they state that they are going to look into any problem you submit... Better off looking into any other company on the market - its headphone EarStudio is also pretty shoddy when it comes to many of its features... Avoid! ### 5/5 — The app sells the product! *2020-10-10, version 1.9.1* Having such an excellent EQ in the audio chain is essential for getting the most enjoyment out of the music IMO. The iPhone should have this built into ios, instead of the same EQ settings that came with the original iPod. Suggestion for developers: Custom Headphone profiles which could change various parameters all at once. ### 3/5 — Great features but overlooking the obvious *2020-08-21, version 1.9.1* The features are great BUT, adding ability to save EQ presets (for different listening setups/hardware) or tap to zero in EQ would be GREATLY appreciated. Add these features and make this software flawless. ### 2/5 — Confusing EQ customization *2020-06-08, version 1.9.1* It took me forever to figure out I’m how to save a custom EQ profile. I’d set the frequency levels I wanted, go back to the profile menu, then my custom profile would reset to FLAT. I finally found out in order to save the profile settings, you have to go back to the profile menu, then long press on the profile you want to save, which is the same thing you’d do if you want to change the profile name. Then tap done. This is a confusing function. Instead of having to go to the profile name editing pop up to save, it should save as soon as you exit the frequency adjustment menu. ### 5/5 — Fantastic! *2020-01-10, version 1.9.1* I’ve had no way up until now to run my music off of my Bandcamp app through an equalizer on my iPhone, but this app coupled with the EarStudio es-100 has finally solved this problem. I also love the ambient feature. I gave my Fios BTR3 to my son, and will use the es-100 from this point onward. Great product. ### 5/5 — Amazing DAC & Companion App *2019-11-23, version 1.9.1* I love this little DAC and it sounds amazing. It has many different ways that you can use it so it’s practically glued to my hand 24/7. ## Frequently asked questions about EarStudio ### What does the EarStudio app do? The EarStudio app functions as a remote control for the Radosone EarStudio Bluetooth Receiver hardware device. It allows you to monitor the device's status, view playback information, and adjust detailed sound settings. ### What are the key features of the EarStudio app? Key features include displaying the device's name, version, battery status, and playback information. It also provides detailed sound control, such as adjusting analog volume, DAC digital filters, and DAC oversampling rates. ### Is the EarStudio app free to use? Yes, the EarStudio app is free to download and use. The provided information indicates it does not have in-app purchases or ads. ### What are the system requirements for the EarStudio app? The EarStudio app requires iOS version 8.0 or later. It is designed to work with the Radosone EarStudio Bluetooth Receiver hardware. ### How do I connect the EarStudio app to my device? When you first run the app, you need to perform a 'Device Search'. This option can be found in the menu button located at the top left of the application window. ## Version history (last 5 releases) ### 1.9.1 — 2019-01-04 - Fixed volume control bug. ### 1.9.0 — 2019-01-03 Added EQ Graph. Added EQ Q option. Added USB DAC 48KHz option. ### 1.8.0 — 2018-09-14 - Optional 2nd device reconnection - Added USB DAC 44.1KHz support - Added USB DAC 24-bit support - Added max. volume limit option - Added EQ headroom option - HFP option ### 1.7.5 — 2018-08-30 - Automatically search and connect ES100 as initial launch after app install. ### 1.7.4 — 2018-08-29 - Automatically search and connect ES100 as initial launch after app install. ## Apps similar to EarStudio | App | Rating | Price | Category | | --- | --- | --- | --- | | [SoundID for enabled headphones](https://appshunter.io/ios/app/soundid-for-enabled-headphones/id1490569267) | 4.4 (170) | Free | Music | | [Amarra Play](https://appshunter.io/ios/app/amarra-play/id1061144320) | 2.8 (30) | Free | Music | | [Onkyo HF Player - Hi-Res Music](https://appshunter.io/ios/app/onkyo-hf-player-hi-res-music/id704139896) | 3.4 (193) | Free | Music | ## More apps by RADSONE Inc. - [airDAC play](https://appshunter.io/ios/app/airdac-play/id1056625629) - [airDAC play HD](https://appshunter.io/ios/app/airdac-play-hd/id1057091898) - [airDAC control](https://appshunter.io/ios/app/airdac-control/id1070456102) All apps by RADSONE Inc.: https://appshunter.io/developer/450450163 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*