# Isai: Hi-Res Music Player — Bit-perfect FLAC, WAV & DSD

> Hi-res music player for owned music files from cloud or local storage. (iPhone/iPad app by Anand Raj R.)

- Source: https://appshunter.io/ios/app/isai-hi-res-music-player/id6808984060 (this page in markdown: same URL + `.md`)
- Developer: [Anand Raj R](https://appshunter.io/developer/514675684)
- Category: Music, Entertainment
- Price: Free with in-app purchases
- Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 18.0 · 34 MB
- Languages: American English, German (Germany), Japanese
- Released: 2026-10-19
- Data updated: 2026-11-06
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/isai-hi-res-music-player/id6808984060/reviews.md

## What is Isai?

Isai is a music player for people who own their music.

Maybe it lives on MEGA. Maybe on Dropbox, a Nextcloud server, a Synology in the cupboard, or a folder on your phone. Connect it once and Isai reads the tags, builds a proper library with albums, artists and artwork, and streams straight from where the files are. Nothing goes through a server in between, and nothing is transcoded on the way.

WHAT PLAYS
FLAC, ALAC, M4A, WAV, AIFF, MP3, AAC, Ogg Vorbis and Opus. DSF and DFF, including DST. Embedded lyrics and .lrc files scroll along with the song.
DSD goes through Isai's own engine. It goes out as DoP to a DAC that takes it, and is carefully converted to PCM for everything else. Playback is gapless, and you can turn on crossfade. Isai skips it wherever it would change the sound.

THE SIGNAL PATH
Tap the quality badge to see what happened between the file and the output: the source, the decoder, any processing, the device it went to, and a verdict. On the Mac, BIT PERFECT means exactly that. Isai can take exclusive access to your DAC and set its sample rate and word length to match the file. Then it reads those settings back from the hardware to make sure they stuck. If the equalizer is on, the verdict says so. If the audio was resampled, it says that too.
On iPhone and iPad, Isai asks an external DAC for the file's own rate and tells you what the system actually gave it, even when that isn't the answer you wanted.

PURE MUSIC ON IPHONE DUO
On an iPhone Duo, Isai can stop looking like an app and turn into a machine.
Choose a pocket cassette player, a portable CD player or a turntable, each modelled on the classics of the eighties, and the machine fills the screen. No tabs, no status bar. Fold the phone shut and the cover screen is the player in your hand, with the tape turning behind its little window or the disc spinning under the lid. Open it and your records sit on one page with the open machine on the other.

Underneath, it's the same library and the same signal path.

ONE LIBRARY, EVERY DEVICE
Add a source on your iPhone and it shows up on your Mac, your iPad and your Apple TV, already signed in. Favourites, playlists, play history and where you stopped in a track all sync through iCloud. So does the library itself: scan a source once and your other devices get the albums without reading the files again. Downloads keep the original files, run in the background, and wait for Wi-Fi if you ask them to.

PLAY ON
Two copies of Isai on the same Wi-Fi can control each other. Sit on the sofa with your phone and play through the Mac that's wired to the good DAC. The queue, the position and the Signal Path follow whichever device is making the sound. Nothing leaves your network and there's no account to create. Your own devices recognise each other through your Apple Account. Anything else has to be let in by hand, with a code shown on both screens.

ALSO
A ten-band equalizer with presets you can copy and rename. An A/B loop for the sixteen bars you're learning, or the cymbal decay you're judging a cable on, with saved loops that play one after another. Album editions, so the FLAC, the MP3 rip and the Apple Music copy of one record show up as a single album with the format shown once. Animated covers when a label ships them. And if you subscribe to Apple Music, it sits on the same shelf as the files you own.

ISAI PRO
Free for the music on your device and for Apple Music. Pro adds cloud sources (MEGA, Dropbox, WebDAV), Play On, Pure Music on iPhone Duo and the widgets. Monthly or Yearly, each with a 7-day free trial for new subscribers, or Lifetime: one payment that never renews. Bought Pro before? It's Lifetime and stays unlocked for good.

Subscriptions renew automatically unless cancelled at least 24 hours before the trial or period ends. Manage them in your Apple Account settings.
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://arrcade.dev/apps/isai/privacy.html

## Key features

- Direct access to cloud/local music files
- Bit-perfect playback for FLAC, WAV, DSD
- Gapless playback and crossfade
- Detailed signal path analysis
- Customizable equalizer
- Cross-device library sync via iCloud
- Remote control between devices

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Mozart of Madras | $2.99 | one-time |
| Isai Puyal (Pro - Lifetime) | $9.99 | one-time |


## Is Isai safe?

Not enough ratings yet to assess Isai.

## Is Isai legit?

Isai: Hi-Res Music Player appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Isai is 75 out of 100 points across 7 verification signals from App Store and developer data.

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/isai-hi-res-music-player/id6808984060/reviews.md

### 5/5 — I love this music player!!!

*2026-10-26*

Everything about this app is so beautiful, I love the audio technical information. My only issue is that some of my albums with mixed audio formats get split up into different albums instead of one. But besides that this is a player that everyone with the iPhone Duo should try!!!!

## Frequently asked questions about Isai

### Does Isai have ads?

No, Isai is completely ad-free, allowing for an uninterrupted listening experience.

### What audio formats does Isai support?

Isai supports a wide range of formats including FLAC, ALAC, M4A, WAV, AIFF, MP3, AAC, Ogg Vorbis, Opus, DSF, and DFF (including DST).

### How does Isai handle DSD playback?

Isai uses its own engine for DSD playback, outputting as DoP to compatible DACs or converting to PCM for other devices, ensuring high-quality reproduction.

### Can I use Isai offline?

Yes, Isai allows you to download music files for offline playback. Downloads can be managed to wait for Wi-Fi if preferred.

### How does Isai sync my library across devices?

Isai syncs your library, playlists, favorites, and playback history across your Apple devices (iPhone, iPad, Mac, Apple TV) using iCloud.

### What is the signal path analysis in Isai?

The signal path analysis shows you exactly what happened to your audio file from source to output, including the decoder, any processing, and the device it went to, verifying bit-perfect playback when applicable.

### Can I control Isai on one device from another?

Yes, two copies of Isai on the same Wi-Fi network can control each other, allowing you to stream music from your Mac to your phone, for example, with synchronized playback and queue.

### What is the age rating for Isai?

Isai has an age rating of 4+, making it suitable for a wide range of users.

## Version history (last 5 releases)

### 1.1 — 2026-11-04

Isai Pro is now available as a Monthly or Yearly subscription, each starting with 7 days free, or as Lifetime, one payment that never renews.

Already bought Isai Pro? It's Lifetime, and it stays yours for good. Nothing to switch, nothing to pay again.

Subscribers can see when their plan renews, manage it from Settings › Pro, and switch to Lifetime at any time.

### 1.0.6 — 2026-11-01

- Fixed an issue where albums with mixed file formats were split into multiple albums.
- Fixed metadata tags not being read correctly from Opus files.
- General bug fixes and performance improvements.

### 1.0.5 — 2026-10-29

Resolved a problem that shifted the volume wheel’s placement following the iOS 27.2 update.

### 1.0.4 — 2026-10-27

Found something new? You can now add an album or playlist to your Apple Music library.

### 1.0.3 — 2026-10-24

10,000+ albums? Challenge accepted.

We’ve fine-tuned Isai to handle massive music libraries with smoother browsing, faster navigation, and improved performance.

Whether you’ve got 10 albums or 10,000+, your music deserves the same love.

Keep collecting. We’ll keep up.

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All apps by Anand Raj R: https://appshunter.io/developer/514675684

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*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 2026-11-06.*