# JDKit Science vs Exhaust Note

The clearest difference is ads: JDKit Science at none against Exhaust Note's shown. JDKit Science also leads on iOS requirement (9.0 vs 18.0). Exhaust Note's advantage is update cadence (every 5 days vs every 67 months). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

JDKit Science ships an update every 67 months, Exhaust Note every 5 days. The most recent releases landed on October 12, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | JDKit Science | Exhaust Note |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (7 ratings)](https://appshunter.io/ios/app/exhaust-note-engine-sound-sim/id6797558385/reviews)** |
| Number of ratings | — | **7** |
| Positive reviews | — | 90.9% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 67 months | **Every 5 days** |
| Monetization | — | Ad-supported |
| Size | 8 MB | 13 MB |
| Requires iOS | **9.0** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [InSoo Kim](https://appshunter.io/developer/975978291) | [seihee han](https://appshunter.io/developer/629944907) |

## What reviewers say

### JDKit Science

[App page](https://appshunter.io/ios/app/jdkit-science/id1186722278)

**Features:** macOS Compatibility

**In-app purchases:** none


### Exhaust Note

[App page](https://appshunter.io/ios/app/exhaust-note-engine-sound-sim/id6797558385)

This app synthesizes realistic engine exhaust sounds from scratch, based on the physics of firing orders and cylinder layouts. Explore various engine configurations, adjust muffler settings, and experience dynamic features like pops, bangs, and flames. It also includes a detailed 3D engine animation and driving simulation elements.

**Highlights:** Real-time synthesized exhaust sounds, Adjustable muffler settings, Diverse engine presets, Pop, bang, and flame effects, Living 3D engine animation, Driving feel simulation, Tunnel reverb mode

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

**In-app purchases:** none


## Frequently asked questions

### Is JDKit Science free?

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

### Is Exhaust Note free?

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

### Do JDKit Science or Exhaust Note have ads?

Exhaust Note shows ads; JDKit Science does not.

### Which is updated more often, JDKit Science or Exhaust Note?

JDKit Science ships an update every 67 months, and Exhaust Note every 5 days. Most recently, JDKit Science was updated on October 12, 2026 and Exhaust Note on October 6, 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.*