Apps like FFT Explorer

Here are some great alternatives to FFT Explorer by JerryDice :
Frequency Sound Generator
Frequency Sound Generator
★4.7
mr spectra
mr spectra
★4.4
AudioUtil Audio Analysis Tools
AudioUtil Audio Analysis Tools
★3.9
PSG9000 Signal Generator
PSG9000 Signal Generator
★3.6
Tuner
Tuner
★4.8
Frequency Generator
Frequency Generator
★4.1
AudioUtil Audio Analysis Tools
AudioUtil Audio Analysis Tools
★3.3
SoundForm Signal Generator
SoundForm Signal Generator
★4.8
Frequency Sound Generator
Frequency Sound Generator
★4.3
Sound Spectrum Pro
Sound Spectrum Pro
★4.6
Tone Generator: Frequency & So
Tone Generator: Frequency & So
★3.8
Sound Frequency Creator
Sound Frequency Creator
★4.0
SpecStream Audio Spectrum Plot
SpecStream Audio Spectrum Plot
★3.8
Frequency Generator (Sound)
Frequency Generator (Sound)
★3.4
Synth
Synth
★4.2
Multi-Frequency Tone Generator
Multi-Frequency Tone Generator
★4.2