When your tuner’s acting up, you can’t find it, or don’t have (gasp) one, there are plenty of phone app tuners that feature other built-in goodies, too. Here are 10 apps, with most also having a free version.

FENDER

Fender Tune Player PackThis enhanced-accuracy tuner with a variety of modes and tunings is part of a tool kit that includes chords, scales, beats, and a metronome.
$5
fender.com

 

YOUSICIAN

GuitarTuna ProThis customizable app for iOS and Android has over 100 different tunings for 15 instruments and features a variety of tools, including a chord guide, ear training, and other exercises.
$13
guitartuna.com

 

IK MULTIMEDIA

UltraTuner
Providing accurate readings down to .01 of a cent, this app for iOS and Android features tuning modes for stage and studio, as well as tuning history to record variations over time.
$10
ikmultimedia.com

 

EUMLAB

insTuner
This easy-to-use app provides five different tuning modes for different situations, while offering a variety of advanced features.
$4
eumlab.com

 

TC ELECTRONIC

PolyTune
Featuring PolyTune technology, which allows all the strings to be strummed and tuned simultaneously, this iOS app can be set for drop tunings up to five semitones down.
$5
tcelectronic.com