Annoydio vs Synthesizer Sim
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Annoydio
Create and manipulate custom sounds using your device's microphone or iTunes file sharing. Assign sounds to pads, alter their frequency, play them in reverse, and add effects. Connect MIDI keyboards for interactive performance.
- Assign and play sounds on a grid of pads
- Create custom sounds with device microphone
- Import custom sounds via iTunes file sharing
- Manipulate sound parameters (frequency, reverse, loop)
- Apply audio effects (distortion, delay)
- Connect MIDI keyboards for polyphonic playback
- Supports Inter-App Audio as sound module/MIDI device
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Annoydio has a grid of pads which you can assign, manipulate, and play sounds. There are several built in sounds you can assign to any of the pads. In the Library you can create your own custom sounds using your device's microphone. You can also add custom sounds through iTunes file sharing. You can manipulate the sounds by changing the frequency, playing in reverse, looping, adding effects such as distortion and delay. You can also change parameters such as attack, decay, sustain, and release. You can connect a MIDI keyboard and play the current sound with full polyphony. On the iPad version there is a popup keyboard. Annoydio also supports Inter-App Audio as a sound module and MIDI device. You can use Annoydio as an instrument to add beats or effects to songs in apps like Garage Band. Short demonstration video here http://www.youtube.com/watch?v=EzuQhLxMxeM
Synthesizer Sim
Transform your device into a versatile synthesizer with extensive sound-shaping capabilities. Explore a wide range of waveforms, envelopes, and effects. Record and share your musical creations as WAV files.
- Multiple oscillators and waveforms
- Extensive envelope and LFO modulation
- Built-in distortion, EQ, chorus, delay, reverb
- Responsive keyboard with MIDI support
- Poly, mono, and legato voice modes
- Customizable scales and tunings
- Performance recording and WAV export
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Turn your iPhone or iPad into an expressive synthesizer. Shape original sounds, play with touch or an external MIDI controller, and capture performances for later playback or WAV sharing. SYNTHESIZE YOUR SOUND • Three oscillators plus a sub oscillator • Six waveforms, unison, detune, mixer and stereo pan controls • Amp and filter envelopes with low-pass, high-pass, band-pass and notch modes • Distortion, EQ, chorus, delay and reverb • Two LFOs for pitch, amplitude and filter modulation PLAY AND CONTROL • Responsive keyboard with velocity, sustain, pitch bend and transpose • Poly, mono and legato voice modes with glide • USB, Bluetooth and network MIDI input • MIDI note, velocity, pitch bend and common controller support PRESETS AND TUNING • 96 factory presets for pads, leads, basses and more • Save your own User presets • Western, world and makam scales • Adjustable root, A4 reference and per-note cent offsets • Save custom User tunings RECORD AND SHARE • Record synth performances without microphone access • Replay saved performances with their sound and tuning settings • Export and share recordings as WAV files FREE AND PREMIUM The free version includes 10 factory presets, up to three User presets and tunings, one saved performance, and optional rewarded access to additional sounds. It may display ads. Premium removes ads and unlocks all 96 factory presets, unlimited User presets and tunings, and unlimited saved performances. Choose a monthly or yearly auto-renewing subscription, or a one-time lifetime purchase. Purchases are managed through your App Store account and can be restored in the app. Terms of Use: https://alyakastudio.com/terms/ Privacy Policy: https://alyakastudio.com/privacy-policy/
Screenshots
Verdict
The clearest difference is price: Synthesizer Sim at Free against Annoydio's $4.99. Synthesizer Sim also leads on rating (4.3 vs 2.8) and ratings volume (16 vs 5). Annoydio's advantage is in-app purchases (none vs 3) and ads (none vs shown). On device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Synthesizer Sim is free to download; Annoydio costs $4.99 up front. Synthesizer Sim sells 3 in-app purchases, starting at $2.99 per month. Annoydio asks for nothing beyond the download.
Synthesizer Sim holds the better App Store score, 4.3 against 2.8. Both are backed by a comparable volume of ratings — 5 and 16 respectively.
Annoydio ships an update every 10 days, Synthesizer Sim every 2 months. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.
| Parameter | Annoydio | Synthesizer Sim |
|---|---|---|
| Price | $4.99 | Free — better |
| Rating | 2.8 (5 ratings) | 4.3 (16 ratings) — better |
| Positive reviews | 20.0% of reviews | — |
| Number of ratings | 5 | 16 — better |
| Update frequency | Every 10 days — better | Every 2 months |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.4 — better | 15.0 |
| Further details — not scored | ||
| Size | 23 MB | 54 MB |
| Age rating | 4+ | 4+ |
| Developer | Anthony Kitowicz | Alper Kahriman |
Customer experience
Annoydio
Synthesizer Sim
In-app purchases
Annoydio
No in-app purchases
Synthesizer Sim
- Premium Monthly$2.991 Month
- Premium Yearly7 Days trial$14.991 Year
- Lifetime Premium$29.99









