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 * 🌐 **[Awesome Music Theory](https://github.com/vpavlenko/study-music)** - Music Theory Resources
 * 🌐 **[Music Outfitters](https://musicoutfitters.com/)** - Music Services / Information
 * ↪️ **[Sheet Music / Notation](https://www.reddit.com/r/FREEMEDIAHECKYEAH/wiki/audio#wiki_.25B7_sheet_music)**
-* ⭐ **[Muted](https://muted.io/)**, **[Open Music Theory](https://viva.pressbooks.pub/openmusictheory/)**, [Chromatone](https://chromatone.center/), [Teoria](https://www.teoria.com/index.php), [LightNote](https://www.lightnote.co/) or [Music Theory](https://www.musictheory.net/) - Music Theory
+* ⭐ **[Muted](https://muted.io/)**, **[Open Music Theory](https://viva.pressbooks.pub/openmusictheory/)**, [Chromatone](https://chromatone.center/), [Teoria](https://www.teoria.com/index.php), [SimplifyingTheory](https://www.simplifyingtheory.com/), [LightNote](https://www.lightnote.co/) or [Music Theory](https://www.musictheory.net/) - Music Theory
 * [Helio](https://helio.fm/) or [NoteHeads](https://noteheads.net/) - Music Composition Tools
 * [MusicKit](https://musickit.jull.dev/) or [Tone Generator](https://www.szynalski.com/tone-generator/) - Metronome, Tuner & Tone Generators
 * [Tuner Ninja](https://tuner.ninja/) - Instrument Tuner