Apps like Lowtone

Here are some great alternatives to Lowtone by ToneBoosters :
Synth Super JX
Synth Super JX
★4.2
Hexen - Modular Synthesizer
Hexen - Modular Synthesizer
★4.3
FM Synthesizer [SynprezFM II]
FM Synthesizer [SynprezFM II]
★4.4
Droid Synth
Droid Synth
★4.4
ModSynth Modular Synthesizer
ModSynth Modular Synthesizer
★4.4
Piano Synth. Music Synthesizer
Piano Synth. Music Synthesizer
★4.5
Sonic Synthesizer
Sonic Synthesizer
★3.5
Bass Loop Maker
Bass Loop Maker
★3.3
My Bass - Bass Guitar
My Bass - Bass Guitar
★3.5
nanoloop
nanoloop
★4.7
bismark bs-16i
bismark bs-16i
★3.5
Wiisp Synth
Wiisp Synth
★4.8
Synth
Synth
★4.3
Bass Editor: Boost Bass
Bass Editor: Boost Bass
★4.2
vuKNOB
vuKNOB
★3.6
Voice Changer - Tune my Voice
Voice Changer - Tune my Voice
★4.4