# JAX CHROMATIC vs BloopKeys

The clearest difference is price: BloopKeys at $1.99 against JAX CHROMATIC's $12.99. BloopKeys also leads on update cadence (every 2 months vs every 14 months). JAX CHROMATIC's advantage is device support (4 vs 2) and iOS requirement (14.0 vs 17.4). On rating, review sentiment, ratings volume and ads there is nothing between them.

JAX CHROMATIC costs $12.99 and BloopKeys $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

JAX CHROMATIC holds the better App Store score, 4.9 against 4.8. Both are backed by a comparable volume of ratings — 7 and 4 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

JAX CHROMATIC ships an update every 14 months, BloopKeys every 2 months. The most recent releases landed on September 22, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | JAX CHROMATIC | BloopKeys |
| --- | --- | --- |
| Price | $12.99 | **$1.99** |
| Rating | **[4.9 (7 ratings)](https://appshunter.io/ios/app/jax-chromatic-compander/id1619225672/reviews)** | [4.8 (4 ratings)](https://appshunter.io/ios/app/bloopkeys/id6689494178/reviews) |
| Number of ratings | **7** | 4 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 2 months** |
| Monetization | Paid | Paid |
| Size | 23 MB | 4 MB |
| Requires iOS | **14.0** | 17.4 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jens Guell](https://appshunter.io/developer/1195004865) | [Joel Stephen Birchler](https://appshunter.io/developer/1768680914) |

## What reviewers say

### JAX CHROMATIC

[App page](https://appshunter.io/ios/app/jax-chromatic-compander/id1619225672)

This advanced audio processor splits sound into 32 frequency bands for real-time spectral dynamics modification. It enhances sound perception, removes muddiness, and offers a user-friendly interface for creative mixing and mastering.

**Highlights:** 32-band spectral processing, Real-time compander per band, Analog filter models, Latency-free operation, Mastering and mixing tool, User-friendly interface

**Features:** Vision Pro support

**In-app purchases:** none


### BloopKeys

[App page](https://appshunter.io/ios/app/bloopkeys/id6689494178)

This application assists musicians by identifying correct notes within specific keys and scales. It offers built-in synth sounds and MIDI output capabilities for integration with external hardware or digital audio workstations.

**Highlights:** Note and key finder, Built-in synth presets, MIDI out support, 30+ scale support, Chord pads, Roman numeral analysis

**In-app purchases:** none


## Frequently asked questions

### Is JAX CHROMATIC free?

JAX CHROMATIC costs $12.99, with no in-app purchases.

### Is BloopKeys free?

BloopKeys costs $1.99, with no in-app purchases.

### Which has better reviews, JAX CHROMATIC or BloopKeys?

JAX CHROMATIC is rated higher. JAX CHROMATIC averages 4.9 out of 5 from 7 ratings, while BloopKeys averages 4.8 from 4 ratings.

### Do JAX CHROMATIC or BloopKeys have ads?

Neither JAX CHROMATIC nor BloopKeys shows ads.

### Which is updated more often, JAX CHROMATIC or BloopKeys?

JAX CHROMATIC ships an update every 14 months, and BloopKeys every 2 months. Most recently, JAX CHROMATIC was updated on September 22, 2026 and BloopKeys on September 12, 2026.

---

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