# Annoydio vs Synthesizer Sim

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.

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.

## The numbers

| Metric | Annoydio | Synthesizer Sim |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [2.8 (5 ratings)](https://appshunter.io/ios/app/annoydio/id671684127/reviews) | **[4.3 (16 ratings)](https://appshunter.io/ios/app/synthesizer-sim/id6740828486/reviews)** |
| Number of ratings | 5 | **16** |
| Positive reviews | 20.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 10 days** | Every 2 months |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 23 MB | 54 MB |
| Requires iOS | **14.4** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Anthony Kitowicz](https://appshunter.io/developer/570772945) | [Alper Kahriman](https://appshunter.io/developer/1054578352) |

## What reviewers say

### Annoydio

[App page](https://appshunter.io/ios/app/annoydio/id671684127)

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.

**Highlights:** 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

**In-app purchases:** none


### Synthesizer Sim

[App page](https://appshunter.io/ios/app/synthesizer-sim/id6740828486)

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.

**Highlights:** 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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $2.99 | per month |
| Premium Yearly | $14.99 | per year |
| Lifetime Premium | $29.99 | one-time |


## Frequently asked questions

### Is Annoydio free?

Annoydio costs $4.99, with no in-app purchases.

### Is Synthesizer Sim free?

Synthesizer Sim is free to download, with in-app purchases available.

### Which has better reviews, Annoydio or Synthesizer Sim?

Synthesizer Sim is rated higher. Annoydio averages 2.8 out of 5 from 5 ratings, while Synthesizer Sim averages 4.3 from 16 ratings.

### Do Annoydio or Synthesizer Sim have ads?

Synthesizer Sim shows ads; Annoydio does not.

### Which is updated more often, Annoydio or Synthesizer Sim?

Annoydio ships an update every 10 days, and Synthesizer Sim every 2 months. Most recently, Annoydio was updated on November 1, 2026 and Synthesizer Sim on November 4, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*