# Core Synth Free vs iDousyn Lite

The clearest difference is rating: iDousyn Lite at 4.4 against Core Synth Free's 2.9. iDousyn Lite also leads on ratings volume (697 vs 8) and update cadence (every 3 months vs every 13 months). Core Synth Free's advantage is ads (none vs shown) and review sentiment (64% vs 36%). On price, in-app purchases, monetization model and device support there is nothing between them.

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

iDousyn Lite holds the better App Store score, 4.4 against 2.9. That said, the two scores are not equally well evidenced: iDousyn Lite has 697 ratings behind it against 8, so its average is the more settled of the two. Written reviews complicate that: 64% of Core Synth Free's written reviews are positive against 36% of iDousyn Lite's, so the app with the better star average is not the one people write more warmly about.

Core Synth Free ships an update every 13 months, iDousyn Lite every 3 months. The most recent releases landed on June 8, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Core Synth Free | iDousyn Lite |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.9 (8 ratings)](https://appshunter.io/ios/app/core-synth-free/id449078353/reviews) | **[4.4 (697 ratings)](https://appshunter.io/ios/app/idousyn-lite/id992557221/reviews)** |
| Number of ratings | 8 | **697** |
| Positive reviews | **63.6% of reviews** | 36.4% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 13 months | **Every 3 months** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 7 MB | 67 MB |
| Requires iOS | **8.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Core Engine Apps](https://appshunter.io/developer/382236096) | [Jorge Lozada](https://appshunter.io/developer/421852863) |

## 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 |


### iDousyn Lite

[App page](https://appshunter.io/ios/app/idousyn-lite/id992557221)

This app transforms your device into a versatile musical instrument, offering a wide range of high-quality sounds and intuitive tools for creating melodies and harmonies. Explore authentic pianos, basses, guitars, and more with innovative features like Chord Pads and DSP effects.

**Highlights:** 8-Octave Virtual Keyboard, Chord Pads with Strum Options, High-Fidelity Oscillators, DSP Effects (Reverb, Delay, EQ), Dual-Channel Sound Blending, MIDI Controller Support, Export to WAV, AIFF, CAF, M4A

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |

**What reviewers like**

- 🎵 High quality sounds
- 👍 Well-designed GUI layout

**What reviewers complain about**

- 📢 Excessive ads and pop-ups
- ⏱️ High latency and slow keyboard response
- 🔄 Intrusive review prompts interrupting usage
- 🎹 Instrument switching bug causing audio overlap

**Reported bugs**

- Piano audio continues playing when switching to other instruments
- App locks up until user submits a review
- Frequent pop-ups and ads interrupt functionality

**Requested features**

- Ringtone customization options


## Frequently asked questions

### Is Core Synth Free free?

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

### Is iDousyn Lite free?

iDousyn Lite is free to download, with in-app purchases available.

### Which has better reviews, Core Synth Free or iDousyn Lite?

iDousyn Lite is rated higher. Core Synth Free averages 2.9 out of 5 from 8 ratings, while iDousyn Lite averages 4.4 from 697 ratings.

### Do Core Synth Free or iDousyn Lite have ads?

iDousyn Lite shows ads; Core Synth Free does not.

### Which is updated more often, Core Synth Free or iDousyn Lite?

Core Synth Free ships an update every 13 months, and iDousyn Lite every 3 months. Most recently, Core Synth Free was updated on June 8, 2026 and iDousyn Lite on September 26, 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.*