# 639 Player Plus — Retune 440 Hz to 639 Hz > Music player that retunes audio to 639 Hz frequency for enhanced connection. (iPhone/iPad app by SYQEL INC.) - Source: https://appshunter.io/ios/app/639-player-plus/id6739763212 (this page in markdown: same URL + `.md`) - Developer: [SYQEL INC](https://appshunter.io/developer/1671066431) - Category: Music, Entertainment - Price: Free with in-app purchases (on sale, was $19.99) - Rating: 4.50/5 from 2 App Store ratings - Age rating: 4+ - Requires: iOS 15.6 · 79 MB - Languages: American English - Released: 2024-12-29 - Data updated: 2026-08-27 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/639-player-plus/id6739763212/reviews.md ## What is 639 Player Plus? 639 Player Plus: Connect & Harmonize Your Music Transform your listening experience with 639 Player Plus, the ultimate music player that automatically retunes your entire music library to the uplifting 639 Hz frequency tuning. This powerful frequency is known to foster love, harmony, and deeper relationships. Effortlessly enhance your connection with your music, others, and yourself, all while saving time, money, and valuable device storage—no manual file conversions needed! Why Choose 639 Player Plus? + Instant 639 Hz Retuning: Play your existing music collection and instantly experience it retuned to 639 Hz. This frequency is believed to promote understanding, reconciliation, and connection. + Save Time & Storage: No more converting songs or cluttering your device with duplicate files. Simply open the app and play your favorite tracks. + Enhance Relationships: Listen to music that resonates with the frequency of connection, potentially improving your interactions and fostering deeper bonds. Key Features: + Automatic Retuning: Your entire music library is seamlessly and instantly retuned to 639 Hz. Just press play! + Custom Playlists: Easily create and manage personalized playlists. Add songs in bulk and organize your favorite tracks in seconds. + Sleep Timer: Drift off to your favorite tunes with the countdown sleep timer. Set it, relax, and let the app stop the music when the timer ends. + iOS & CarPlay Support: Take your harmonized music anywhere—on your iPhone or in your car. 639 Player Plus is designed to fit seamlessly into your lifestyle. + Full Playback Control: Enjoy complete control over your listening with Shuffle, Normal, Repeat One, and Repeat All playback modes. Unlock More Solfeggio Frequencies (In-App Purchase) Expand your sonic journey beyond 639 Hz! Gain access to additional Solfeggio frequencies to explore the profound "healing power" of sound and experience music like never before. Each frequency offers unique benefits for your mind, body, and spirit. Ready to connect with your music and foster deeper harmony in your life? Download 639 Player Plus today and transform the way you listen. ## Key features - Automatic 639 Hz retuning - Save time and storage - Custom playlist creation - Sleep timer - iOS and CarPlay support - Full playback control ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Frequency - 432 Hz | $19.99 | one-time | | Frequency - 285 Hz | $19.99 | one-time | | Frequency - 396 Hz | $19.99 | one-time | | Frequency - 963 Hz | $19.99 | one-time | | Frequency - 174 Hz | $19.99 | one-time | | Frequency - 417 Hz | $19.99 | one-time | | Frequency - 741 Hz | $19.99 | one-time | | Solfeggio Core Bundle | $59.99 | one-time | | Frequency - 528 Hz | $19.99 | one-time | | Frequency - 852 Hz | $19.99 | one-time | ## Frequently asked questions about 639 Player Plus ### What is 639 Player Plus? 639 Player Plus is a music player that automatically retunes your music library to the 639 Hz frequency. This frequency is associated with fostering love, harmony, and deeper relationships. ### How does 639 Player Plus retune music? The app instantly retunes your existing music files to 639 Hz without requiring manual file conversions. This process is designed to be seamless and save you time and device storage. ### Can I create playlists with 639 Player Plus? Yes, 639 Player Plus allows you to easily create and manage personalized playlists. You can add songs in bulk and organize your favorite tracks efficiently. ### Does 639 Player Plus have a sleep timer? Yes, the app includes a sleep timer feature. You can set a countdown, and the music will stop automatically when the timer ends, allowing you to drift off to sleep. ### Is 639 Player Plus available on other platforms besides iOS? Currently, 639 Player Plus supports iOS devices, including iPhone and iPad, and is also compatible with CarPlay for in-car listening experiences. ### Can I unlock more Solfeggio frequencies in 639 Player Plus? Yes, you can unlock additional Solfeggio frequencies through an in-app purchase. This allows you to explore a wider range of frequencies beyond 639 Hz for unique benefits. ### What is the price of 639 Player Plus? 639 Player Plus is available for a one-time purchase of $19.99. There are also optional in-app purchases to unlock additional features. ### How often is 639 Player Plus updated? The app was last updated on July 6, 2025, with version 1.0.4. This indicates a recent update, suggesting ongoing development and support. ## Version history (last 4 releases) ### 1.5.7 — 2026-06-25 Improved user experience and app performance ### 1.0.4 — 2025-07-06 Added restore purchase button to billing page Fixed a bug on music files retrieval ### 1.0.1 — 2025-01-08 Added the "Updated Library" button to add any new songs downloaded to your iPhone through the Apple Music app ### 1.0 — 2024-12-29 No release notes. ## Apps similar to 639 Player Plus | App | Rating | Price | Category | | --- | --- | --- | --- | | [MultiTone Generator](https://appshunter.io/ios/app/multitone-generator/id1161245288) | 4.6 (355) | Free | Music | | [432 Hz Converter](https://appshunter.io/ios/app/432-hz-converter/id6751567434) | 4.6 (76) | Free | Music | | [TimePitch-Pitch, Speed Changer](https://appshunter.io/ios/app/timepitch-pitch-speed-changer/id1039713963) | 4.6 (1,937) | Free | Music | | [ElectricFM - EDM Dance Radio](https://appshunter.io/ios/app/electricfm-edm-dance-radio/id404562505) | 4.6 (8) | Free | Music | | [Vocal Booth](https://appshunter.io/ios/app/vocal-booth/id6469059560) | 5.0 (5) | Free | Music | | [Lyrric: Vocal Coach & Training](https://appshunter.io/ios/app/lyrric-vocal-coach-and-training/id6758929916) | 5.0 (3) | Free | Music | ## More apps by SYQEL INC - [HZP (Hertz Player)](https://appshunter.io/ios/app/hzp-hertz-player/id1671066429) - [Solfeggio Frequencies Player](https://appshunter.io/ios/app/solfeggio-frequencies-player/id6502956524) - [174 Player Plus](https://appshunter.io/ios/app/174-player-plus/id6739762965) - [432 Player Plus](https://appshunter.io/ios/app/432-player-plus/id6739762987) - [528 Player Plus](https://appshunter.io/ios/app/528-player-plus/id6739763108) - [285 Player Plus](https://appshunter.io/ios/app/285-player-plus/id6739763153) All apps by SYQEL INC: https://appshunter.io/developer/1671066431 --- *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 2026-08-27.*