# KDJ vs jAmpler

The clearest difference is rating: KDJ at 4.8 against jAmpler's 4.2. KDJ also leads on in-app purchases (none vs 1) and iOS requirement (10.0 vs 14.0). On price, review sentiment, ratings volume and update cadence there is nothing between them.

Both are free to download. jAmpler sells 1 one-off in-app purchase. KDJ asks for nothing beyond the download.

KDJ holds the better App Store score, 4.8 against 4.2. Both are backed by a comparable volume of ratings — 17 and 6 respectively. Written reviews point the same way: 67% of KDJ's written reviews are positive against 60% of jAmpler's.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 4, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | KDJ | jAmpler |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (17 ratings)](https://appshunter.io/ios/app/kdj-one/id1385367500/reviews)** | [4.2 (6 ratings)](https://appshunter.io/ios/app/jampler/id6757974471/reviews) |
| Number of ratings | **17** | 6 |
| Positive reviews | **66.7% of reviews** | 60.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 82 MB | 1.4 GB |
| Requires iOS | **10.0** | 14.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [CyberStep, Inc.](https://appshunter.io/developer/459682825) | [Jan Maes](https://appshunter.io/developer/1550506252) |

## What reviewers say

### KDJ

[App page](https://appshunter.io/ios/app/kdj-one/id1385367500)

Create music on your smartphone with a portable audio workstation. Compose original songs or mix existing tracks using over 400 instruments and 200 preset samples. Ideal for beginners and on-the-go musicians.

**Highlights:** Compose music in 5 minutes, Over 200 preset tracks, Over 400 instruments, Sequencer, Synthesizer, Sampler modes, Song Mode for arrangement, Personal DJ machine functionality

**Features:** macOS Compatibility

**In-app purchases:** none


### jAmpler

[App page](https://appshunter.io/ios/app/jampler/id6757974471)

Record, import, and manipulate audio samples with a versatile instrument plugin. Create unique sounds using granular synthesis and a wide array of effects. Assign samples to a keyboard for intuitive musical performance.

**Highlights:** Record and import audio samples, Assign samples to keyboard keys, Granular synthesis controls, Extensive per-sample editing, Global effects suite, Adjustable velocity curve and temperament

**Features:** Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| jAmpler Activation | $7.99 | one-time |


## Frequently asked questions

### Is KDJ free?

KDJ is free to download, with no in-app purchases.

### Is jAmpler free?

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

### Which has better reviews, KDJ or jAmpler?

KDJ is rated higher. KDJ averages 4.8 out of 5 from 17 ratings, while jAmpler averages 4.2 from 6 ratings.

### Do KDJ or jAmpler have ads?

Neither KDJ nor jAmpler shows ads.

### Which is updated more often, KDJ or jAmpler?

KDJ ships an update every 3 months, and jAmpler every 3 months. Most recently, KDJ was updated on October 4, 2026 and jAmpler on October 11, 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.*