OS-39: Offline Music Player
Hi-Res Audio & Visualizer
Free · In‑App Purchases · Designed for iPad
No subscriptions. No ads. Welcome to high-fidelity audio with OS-39 Audio Player -- the perfect DAP for your local and offline collection.
Experience your music collection through a lens of clean design and technical precision. OS-39 is a premium Digital Audio Player (DAP) designed for those who value their local offline music library, offering a focused listening experience without subscriptions, ads, or distractions.
YOUR COLLECTION, YOUR WAY
OS-39 is built for your offline collection of music and allows you to play your high-quality audio files directly from the Files app using advanced in-place linking.
Whether it's FLAC, ALAC, or MP3, OS-39 handles your high-fidelity files with ease.
IMMERSIVE VISUALS
Get lost in the music with reactive visualizers. From the fluid "Aurora" backgrounds to the tactile "Ripple" fields, your screen becomes a functional extension of the soundscape.
PRO-GRADE AUDIO CONTROL
Tailor every track with a simple 5-band or professional 10-band ISO Equalizer.
Save custom EQ profiles for specific albums or playlists to ensure your gear always sounds its best.
SMART DISCOVERY
The on-device OS-39 Recommendation Engine learns your habits based on time, day, and season. Rediscover your library with "Forgotten Gems" and personalized daily suggestions that never leave your device. Your data stays private, offline, and secure. Want to know how the Engine works and learns? You can view it in the app, and enable or disable it as you wish.
KEY FEATURES:
• Gapless Playback & Customizable Crossfade (Pro)
• 10-Band Equalizer with Presets (Pro)
• Import our Music: Play directly from the Files app
• Beautiful Aesthetic Themes: Vocaloid, Sakura, Tokyo Tower, and more
• Interactive Widgets: Quick access to your favorites and recent plays
• Haptic Feedback: A tactile, mechanical feel to every interaction
• Privacy First: No tracking, no data collection, 100% offline
UPGRADE TO PRO
Unlock the full OS-39 experience with a simple one-time purchase. No subscriptions, forever.
• Advanced Playback: Gapless & Crossfade
• Full 10-Band Equalizer Access
• Exclusive Premium Themes
• Exclusive Visualizers
• Enhanced Library Intelligence
Elevate your listening experience. Welcome to OS-39.
Ratings & Reviews
This app hasn’t received enough ratings or reviews to display an overview.
- Fixes some bugs with the gapless and crossfade features.
- Fixes bugs with importing FLAC and MP3 files' metadata information.
The developer, Bryan Jeffrey Martin, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Bryan Jeffrey Martin
- Size
- 7.8 MB
- Category
- Music
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - iPad
Requires iPadOS 26.0 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.0 or later.
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Pro (Permanent Unlock) $9.99
- Copyright
- © 2026 Pandesal Bytes