Music Reading Apps

• OnSong
  
• ForScore
  
• Ultimate-Guitar
  

Music Performance/Instrument Apps

• Model D Moog
  
• IKAOSILLATOR (KORG)
  
• AmpKit
  
• Amplitude
  
• Tonebridge Guitar Effects (Lets you get the effects from the original song (part of ultimate-guitar))
  
• Jam Up Pro
  
• Propellerhead Thor
  
• Animoog
  
• iGrandPiano
  
• NodeBeat
  

Music Creation Apps

• Notion
  
  • Probably the best
    
• MuseScore
  
• NotateMe (Handwriting)
  
• Symphony Pro
  
• Beatmaker 3
  

DAWs

• GarageBand
  
• Auria
  
• Cubasis
  
• FL Studio
  
• BandLab
  
• Loopy HD
  

Music Playback Apps

• Apple Music
  
• Spotify
  
• Multitracks
  
• Loop Community Prime
  
• Guitar Jam Tracks
  

Miscellaneous

• Logic Remote
  
• TouchpadOS
  
  • Midi controller
    
• Any Digital Soundboard app (Mixing Station App is the best)