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Screenshots

  • Synth Box: Music Synthesizer screenshot 1
  • Synth Box: Music Synthesizer screenshot 2
  • Synth Box: Music Synthesizer screenshot 3
  • Synth Box: Music Synthesizer screenshot 4

About Synth Box: Music Synthesizer

Synth Box turns your iPhone and iPad into a beautiful, play-anywhere synthesizer. Tap a key and it sings. Twist a knob, roll the dice, and shape the sound your way. No setup, no complicated menus. Just gorgeous sound, instantly. PLAY • A slide-to-play keyboard with glissando, plus pitch and mod wheels • Two morphing wavetable oscillators, a sub oscillator, FM and noise for huge, fat tones • A warm Moog-style low-pass filter with resonance and an LFO • ADSR envelope, octave shift and zoom for fast, expressive playing 100 PRO SOUNDS • 100 hand-crafted presets across Bass, Lead, Pad, Pluck, Keys, Brass, Arp, Bell, Organ and FX • Roll the dice for instant inspiration • Tweak any sound and save your own patches to build a personal sound library EFFECTS THAT MOVE • Lush reverb, musical delay, bit-crusher and a wide Fatten ensemble chorus • Shape space, movement and grit in real time while you play RECORD & SHARE • Capture your performance to WAV with reverb and delay tails included • Play it back and share it anywhere with a tap MIDI • Connect any USB or Bluetooth MIDI controller • Play Synth Box with external keys, wheels and knobs • Send your notes back out to other apps and gear MADE TO FEEL GOOD • Designed for iPhone and iPad • A clean light theme, plus a dark stage theme with Premium • No account and no sign-up required • No ads and no tracking • Works fully offline FREE TO PLAY. PREMIUM UNLOCKS EVERYTHING. Play the synth, shape sounds and enjoy 20 starter presets for free. Go Premium to unlock all 100 presets, recording and sharing, saving your own patches, MIDI support, the dark theme and the full-screen keyboard. Choose a monthly or yearly plan with a 3-day free trial, or unlock everything forever with a one-time Lifetime purchase. Download Synth Box and make something beautiful in the next 60 seconds. Terms of Use: https://alyakastudio.com/terms/ Privacy Policy: https://alyakastudio.com/privacy-policy/

What’s new

Version 2.2.1 · Updated October 12, 2026

A big update for Synth Box: • Redesigned welcome tour and Premium screen, sized for every iPhone and iPad • MIDI: choose the pitch bend range, send your notes out to other gear, and enjoy steadier controller connections • Delay fixed: it now blends with your dry sound and follows the Mix knob • Hold and Mono stay the way you left them • Sound stops when headphones are unplugged • Deleting a recording now asks for confirmation • More reliable purchases and restore • Many small fixes and improvements

App privacy

The developer, Alper Kahriman, reported these privacy practices to Apple.

Data Linked to You

The following data, which may be collected and linked to your identity, may be used for the following purposes:

  • Purchases: Purchase History
  • Identifiers: Device ID

Used for: Analytics, App Functionality

Alternatives to Synth Box: Music Synthesizer

Looking for apps like Synth Box: Music Synthesizer? Here are 6 similar apps on the App Store. The highest rated is Tonic Synths (5.0/5), and all 6 are free to download.

Synth Box: Music Synthesizer vs. alternatives
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Synth Box: Music Synthesizer 5.0 / 5 (1 rating) Free October 12, 2026
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