# Core Synth Free vs Synthesizer Sim

The clearest difference is rating: Synthesizer Sim at 4.1 against Core Synth Free's 2.9. Synthesizer Sim also leads on update cadence (every 4 months vs every 13 months). Core Synth Free's advantage is ads (none vs shown) and iOS requirement (8.0 vs 15.0). On price, ratings volume, in-app purchases and monetization model there is nothing between them.

Both are free to download. Core Synth Free sells 1 one-off in-app purchase and Synthesizer Sim sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Synthesizer Sim holds the better App Store score, 4.1 against 2.9. Both are backed by a comparable volume of ratings — 8 and 12 respectively.

Core Synth Free ships an update every 13 months, Synthesizer Sim every 4 months. The most recent releases landed on June 8, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Core Synth Free | Synthesizer Sim |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.9 (8 ratings)](https://appshunter.io/ios/app/core-synth-free/id449078353/reviews) | **[4.1 (12 ratings)](https://appshunter.io/ios/app/synthesizer-sim/id6740828486/reviews)** |
| Number of ratings | 8 | **12** |
| Positive reviews | 63.6% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 13 months | **Every 4 months** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 7 MB | 52 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Core Engine Apps](https://appshunter.io/developer/382236096) | [Alper Kahriman](https://appshunter.io/developer/1054578352) |

## What reviewers say

### Core Synth Free

[App page](https://appshunter.io/ios/app/core-synth-free/id449078353)

Create music with a monophonic synthesizer featuring dual oscillators, adjustable filters, and envelope shaping. Explore various wave patterns and octaves to craft unique sounds for live performance or composition.

**Highlights:** Dual overlapping oscillators, Four wave patterns, Adjustable low pass filter, ADSR envelope shaping, 1 octave keyboard, Save and load patches

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version Upgrade | $0.99 | one-time |


### Synthesizer Sim

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

This app transforms your device into a versatile music creation studio, offering a responsive synth keyboard and advanced sound design tools. Explore a wide range of sounds, record your performances, and share your music instantly. It supports MIDI input and includes rhythm tools for practice and live performance.

**Highlights:** Responsive synth keyboard, Advanced sound design engine, Built-in effects and modulation, MIDI keyboard support, Rhythm accompaniment and metronome, Performance recording and sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Get Premium | $9.99 | one-time |


## Frequently asked questions

### Is Core Synth Free free?

Core Synth Free is free to download, with in-app purchases available.

### Is Synthesizer Sim free?

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

### Which has better reviews, Core Synth Free or Synthesizer Sim?

Synthesizer Sim is rated higher. Core Synth Free averages 2.9 out of 5 from 8 ratings, while Synthesizer Sim averages 4.1 from 12 ratings.

### Do Core Synth Free or Synthesizer Sim have ads?

Synthesizer Sim shows ads; Core Synth Free does not.

### Which is updated more often, Core Synth Free or Synthesizer Sim?

Core Synth Free ships an update every 13 months, and Synthesizer Sim every 4 months. Most recently, Core Synth Free was updated on June 8, 2026 and Synthesizer Sim on September 22, 2026.

---

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