# iDousyn vs CalmusPlay

The clearest difference is rating: CalmusPlay at 5.0 against iDousyn's 4.2. CalmusPlay also leads on in-app purchases (none vs 1) and price ($2.99 vs $6.99). iDousyn's advantage is ratings volume (161 vs 2). On review sentiment, update cadence, ads and device support there is nothing between them.

iDousyn costs $6.99 and CalmusPlay $2.99 up front. iDousyn sells 1 one-off in-app purchase. CalmusPlay asks for nothing beyond the download.

CalmusPlay holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: iDousyn has 161 ratings behind it against 2, so its average is the more settled of the two. Written reviews split almost evenly too, at 34% and 33% positive.

iDousyn ships an update every 2 months, CalmusPlay every 4 months. The most recent releases landed on October 24, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | iDousyn | CalmusPlay |
| --- | --- | --- |
| Price | $6.99 | **$2.99** |
| Rating | [4.2 (161 ratings)](https://appshunter.io/ios/app/idousyn/id421852860/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/calmusplay/id941247632/reviews)** |
| Number of ratings | **161** | 2 |
| Positive reviews | **34.1% of reviews** | 33.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 1.2 GB | 291 MB |
| Requires iOS | 26.0 | **11.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Jorge Lozada](https://appshunter.io/developer/421852863) | [Erki-tonlist sf](https://appshunter.io/developer/929321904) |

## What reviewers say

### iDousyn

[App page](https://appshunter.io/ios/app/idousyn/id421852860)

This app transforms your device into a professional music production tool. It features a sample-based synthesizer with dual-layer sampling, advanced filters, and a professional effects chain. Create immersive sounds and build captivating tracks with an intuitive interface and extensive sound library.

**Highlights:** Dual-layer sampling, Advanced filters and EQ, Professional effects chain, Creative chord pads, MIDI mastery, Expansive sound library

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Pro | Free | one-time |

**What reviewers like**

- 👍 Good clean sounds
- 👍 Simple to use
- 👍 Low CPU usage
- 👍 Sounds great
- 👍 Great piano and strings app

**What reviewers complain about**

- 🐛 Ads pop up making it unplayable
- 🐛 Full version still displays full-page ads
- 🐛 Ads appear on the front page
- 🐛 Ads are annoying
- 🐛 Totally unusable product

**Reported bugs**

- App crashes immediately
- Full version displays full-page ads
- Ads appear on the front page
- New update has ads
- Implemented trackers

**Requested features**

- Adaptive Crasher (AUV3, Adaptive Cubasis and Zenbeats)
- AUV3 support
- Audiobus compatibility
- MIDI IN for better keyboard control
- Background audio option


### CalmusPlay

[App page](https://appshunter.io/ios/app/calmusplay/id941247632)

This app generates original, royalty-free music using artificial intelligence. Users can customize compositions by selecting elements like geographical origin, zodiac sign, interests, and desired speed. It's a simplified version of a desktop music composition program.

**Highlights:** AI music composition, Royalty-free music, Customizable music parameters, Personalized music generation, Simplified desktop version

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is iDousyn free?

iDousyn costs $6.99, and also offers in-app purchases.

### Is CalmusPlay free?

CalmusPlay costs $2.99, with no in-app purchases.

### Which has better reviews, iDousyn or CalmusPlay?

CalmusPlay is rated higher. iDousyn averages 4.2 out of 5 from 161 ratings, while CalmusPlay averages 5.0 from 2 ratings.

### Do iDousyn or CalmusPlay have ads?

Neither iDousyn nor CalmusPlay shows ads.

### Which is updated more often, iDousyn or CalmusPlay?

iDousyn ships an update every 2 months, and CalmusPlay every 4 months. Most recently, iDousyn was updated on October 24, 2026 and CalmusPlay on October 17, 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.*