# One In A Billion Applications > One In A Billion Applications creates innovative music apps for iOS and macOS, designed to inspire musicians, producers, songwriters, and music enthusiasts. ## Company One In A Billion Applications is an independent app development studio specialising in music-related software for Apple platforms (iOS and macOS). All apps are available on the Apple App Store. - Website: https://oneinabillion.net - Support: support@oneinabillion.net ## Apps ### MixHaven - Description: MixHaven is a project management tool designed specifically for music producers, songwriters, and mix engineers. It replaces messy folders and scattered notes with a professional dashboard built for the way you actually work. - Platforms: macOS, iPad, iPhone - Key Features: Session Management, Beat & Project Catalog, Version Control, Precision Collaboration with time-coded comments, Deadline Tracking, Offline by default with iCloud sync - Website: https://mixhaven.app - App Store: https://apps.apple.com/gb/app/mixhaven-organize-your-music/id6758555288 - Pricing: Free to download with 7-day trial, then subscription or one-time purchase ### Chordio - Description: Chordio is a powerful composition and music theory tool that makes finding chords and scales fun to learn. Essential for music producers, composers, and teachers. - Platforms: iPad, iPhone - Key Features: Chord Voicing Generator, Scales & Modes Explorer, Chord Progression Catalog - Website: https://chordio.co.uk - App Store: https://itunes.apple.com/app/id1580214821 - Pricing: Free ### Writers Session Pro - Description: Writers Session Pro is a songwriter's companion for organising thoughts and ideas in a single place. It offers a collection of creative writing tools to help streamline and stimulate the creative process. - Platforms: iPad, iPhone - Key Features: Full Text Editor, Built-in Audio Recorder, Offline Rhyming Dictionary/Thesaurus/Dictionary, Backing Track Import, Word & Phrase Collections, Dark Mode, Autosave, Fullscreen Mode, Songwriting Credits & Splits - Website: https://writerssession.com - App Store: https://apps.apple.com/gb/app/writers-session-pro/id6756976450 - Pricing: Free - Review: "Writer's Session is a pretty darn good app." — Matt Vanacoro, Ask Audio Magazine ### Sonosync - Description: Music in tune with your resting heartbeat. Sonosync helps you relax and sleep with tempo-controlled compositions and beautiful photo galleries. - Platforms: iPad, iPhone - Key Features: Five musical compositions at three tempos (over 2 hours of music), Sleep Timer with fade-out, Photo Gallery with 42 images - App Store: https://itunes.apple.com/gb/app/sonosync/id990197299 - Pricing: Free ### Chart Music - Description: Listen to the top music from over 30 countries around the world. Features the best selling songs from the iTunes music store across 32 countries. - Platforms: iPad, iPhone - Key Features: Artist Biography & Photo Gallery, Audio Song Previews, Tour Dates with Map View - App Store: https://itunes.apple.com/gb/app/chart-music/id479881186 - Pricing: Free ## Frequently Asked Questions Q: What apps does One In A Billion Applications make? A: One In A Billion Applications makes five music apps: MixHaven (project management for music creatives), Chordio (music theory and composition), Writers Session Pro (songwriting tools), Sonosync (relaxation music), and Chart Music (global music charts). Q: What platforms are the apps available on? A: All apps are available on iPad and iPhone. MixHaven is also available on macOS. Q: Are the apps free? A: All apps are free to download from the Apple App Store. MixHaven offers a 7-day free trial followed by a subscription or one-time purchase. Q: How do I contact support? A: Email support@oneinabillion.net with any feedback, suggestions, or support questions. Q: What is MixHaven? A: MixHaven is a project management app for music producers, songwriters, and mix engineers. It features session management, a beat and project catalog, version control, precision collaboration with time-coded comments on waveforms, and deadline tracking. It is offline by default with optional iCloud sync. Q: What is Chordio? A: Chordio is a music theory and composition tool for learning chords, scales, and modes. It includes a chord voicing generator, shows related chords and scales, and lets you catalog chord progressions. Q: What is Writers Session Pro? A: Writers Session Pro is a songwriting companion featuring a full text editor, audio recorder, offline rhyming dictionary, thesaurus, backing track import, word collections, dark mode, autosave, and songwriting credit management. Q: What is Sonosync? A: Sonosync plays music tuned to your resting heartbeat to help you relax and sleep. It includes five compositions at three tempos, a sleep timer, and a gallery of 42 photos. Q: What is Chart Music? A: Chart Music lets you listen to top music charts from over 30 countries, featuring artist biographies, photo galleries, audio previews, and tour dates with map views.