eigenTunes vs Cisum Player

In 2014, a group of science-and-engineering enthusiasts who loved composing founded eigenTunes. The name eigenTunes combines the prefix of the physics term eigenstate with tunes. Eigenstate, also known as a “quantum state,” describes the measurable quantities of any system in the universe. For an object confined in a box, its eigenstates can be visualized as sine wave functions of different frequencies. By merging this concept with the musical staff, we created our logo. What began as a gathering driven purely by passion gradually evolved into a full-time pursuit as our projects multiplied. Yet whether as a hobby group or a full-time team, what we do has never fundamentally changed. We simply aim to express our emotions and feelings through music in the most genuine way possible and share them with the world. That original intention has never changed—and never will. Because our members come from backgrounds in physics, mathematics, and computer science, we have a strong foundation in programming, algorithms, and hardware. Therefore, we not only create our own musical content but also build playback platforms and custom players to achieve the most refined and immersive expression possible.

Cisum - Clean Ad-Free Audio Player A pure music player without ads, designed for focused listening with local music and audiobook support. Cisum is a player designed for true music lovers. No annoying ads, no shake-to-navigate, no endless popups—just pure music experience. Key Features • Local Music Playback - Supports MP3, M4A, FLAC, WAV and more • Audiobook Management - Separate library for your audiobooks • iCloud Sync - Keep your music library synchronized across all devices • Elegant Interface - Native experience following Apple design guidelines Why Cisum? Most music apps seem to care more about ads and monetization than your listening experience. Cisum is different—we believe a great player should make you forget its existence and focus only on the music. Perfect For • Music lovers tired of ads • Users with large local music collections • Audiobook and podcast enthusiasts • Anyone seeking a clean, efficient experience [Auto-Renewable Subscription] -- Premium Benefits: Unlimited audio files -- Subscription Period: 1 month, 1 year -- Subscription Price: Prices as displayed in-app at purchase, e.g., yearly subscription ¥78/year -- Cancellation: To cancel, go to Apple ID "Media & Purchases" and cancel subscription -- Renewal: Your Apple account will be charged automatically before expiration, extending license for another cycle upon successful payment [License Agreement] https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ [Privacy Policy] https://www.kuaiyizhi.cn/privacy