Castiv Guitar Sidekick review

  • £19.95
  • $29.99

Smart gizmo for smartphones

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Our Verdict

Would make a useful addition to anyone with a growing collection of guitar apps.


  • A handy little gadget.


  • Heavy devices can lift out your strings!
Buying options

The Castiv Guitar Sidekick clamps your smartphone or media player to the strings at your guitar's headstock, allowing you to view videos, tabs and apps at a sensible angle.

Be wary of really heavy devices, though - the weight of the device on one of our guitars was just enough to lift the high E string out of the nut. Still, in all but that instance the Sidekick worked exactly as expected.

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