# Leviathan & Scylla by JeffTron

> Smartphone fire control unit for airsoft guns with real-time adjustments and statistics. (iPhone/iPad app by Filip Nemec.)

- Source: https://appshunter.io/ios/app/leviathan-and-scylla-by-jefftron/id1453175928 (this page in markdown: same URL + `.md`)
- Developer: [Filip Nemec](https://appshunter.io/developer/1548918462)
- Category: Sports
- Price: Free
- Rating: 5.00/5 from 7 App Store ratings · 6 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 44 MB
- Languages: English
- Released: 2019-03-21
- Data updated: 2026-07-24
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/leviathan-and-scylla-by-jefftron/id1453175928/reviews.md

## What is Leviathan & Scylla by JeffTron?

JeffTron application turns your smartphone into controllable fire control unit for your airsoft gun.
Thanks to this app you can easily set up your gun in real time.
App works in wireless mode with Leviathan hardware from the Jefftron Company, for all functions you have to buy Leviathan unit.
By this app you can also upgrade your Leviathan unit for free with updates which we release in the future.

Features:
- hybrid fire modes
- binary trigger mode
- pre-cocking function for instant shot on SEMI fire
- statistics shows cycle timing, motor current consumption, rate of fire and mosfet temperature.
- adjustable active braking (can be disabled)
- smooth control rate of fire
- fast trigger response
- adjustable burst fire
- low battery indicator
- time delay between shots
- low current consumption in idle state
- 3 shot counters
- error log shows problems made during the device life
- Electronic fuse avoid any damage to Leviathan if something goes wrong
- User can save multiple settings under profiles
- controling hardware via wireless connection
- update function fixes bugs and adds new features to the device

Contact us:
support@jefftron.cz

If you like this app please join the group on the Facebook!
https://www.facebook.com/groups/Leviathan.by.jeffTron.QA/

App requires wireless BLE connection with Leviathan hardware.
We are constantly optimizing application and adding new features for free.

## Key features

- Hybrid fire modes
- Binary trigger mode
- Pre-cocking function
- Performance statistics
- Adjustable active braking
- Wireless hardware control
- Free firmware updates

## Recent user reviews (6 of 6)

All indexed reviews: https://appshunter.io/ios/app/leviathan-and-scylla-by-jefftron/id1453175928/reviews.md

### 5/5 — It is bset e-trigger and best control app

*2023-11-25, version 3.6.0*

I recommend it.

### 2/5 — Update

*2021-06-12, version 3.0.3*

Ever since iv updated my mosfet to the latest software my blaster will not work it was fine on the previous firmware

### 5/5 — Levi for the win

*2020-08-06, version 1.4.3*

It’s not hard to be the best when you’re the only one in the race!
Jefftron are pioneers in their industry and have made it sooo simple to program and tune your AEG Airsoft or gel blaster that once you have experienced this new era in FCU’s you’ll never go back. 
This App is easy to navigate, constantly updated and rock solid.

### 5/5 — Best out there!

*2020-05-23, version 1.4.2*

Connects really fast to my phone tons of functions and easy to install highly recommend using the app!

### 4/5 — mode edit

*2019-08-10, version 1.1.0*

please make it possible to do 'safe / safe / safe'.

### 5/5 — Awesome

*2019-06-18, version 1.0.2*

I’m lucky that they have this on iPhone for the MOSFET god  very pleased 😊now I can flex around using this app to control my airsoft rifle

## Frequently asked questions about Leviathan & Scylla by JeffTron

### What is Leviathan & Scylla?

Leviathan & Scylla is a smartphone application that functions as a wireless fire control unit for compatible airsoft guns. It allows users to adjust various firing settings and monitor performance metrics in real-time.

### Does Leviathan & Scylla require any hardware?

Yes, the application requires wireless BLE connection with compatible Leviathan hardware from Jefftron Company. All functions are accessible only when connected to this hardware unit.

### Can I update the Leviathan hardware using this app?

Yes, the app provides a free update function to upgrade your Leviathan unit with new features and bug fixes released by the developer.

### What kind of statistics does Leviathan & Scylla provide?

The app displays statistics such as cycle timing, motor current consumption, rate of fire, and MOSFET temperature, offering detailed insights into your airsoft gun's performance.

### What are the supported fire modes in Leviathan & Scylla?

Leviathan & Scylla supports hybrid fire modes, binary trigger mode, and adjustable burst fire. It also features a pre-cocking function for instant shots on SEMI fire.

### Is Leviathan & Scylla available on Android?

The app is supported on iPhone, iPad, and iPod, indicating iOS compatibility. Specific Android support is not detailed in the provided information.

### How often is Leviathan & Scylla updated?

The application is constantly being optimized and new features are added for free. The latest version is 4.4.1, updated on January 29, 2026.

### What is the user sentiment for Leviathan & Scylla?

Users have rated Leviathan & Scylla highly, with an average of 5.0 stars from 7 ratings, suggesting a positive user experience.

## Version history (last 5 releases)

### 5.0.1 — 2026-06-29

- Fixed missing options for safe slector position for Scylla AEG
- Fixed fw update dialog

### 5.0.0 — 2026-06-19

Added support for HPA system

### 4.4.1 — 2026-01-29

Fixed buttons bug

### 4.4.0 — 2026-01-26

- Added support for new V2 Optical GTS hardware

### 4.3.0 — 2025-11-07

- New features:
  - Added OTA emergency update for Scylla
  - Enabled BOSS feature for V3 hardware
- Bug fixes:
  - Fixed external sound system

## Apps similar to Leviathan & Scylla by JeffTron

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [MKAirsoft](https://appshunter.io/ios/app/mkairsoft/id6775982932) | — | Free | Sports |
| [ShootOnTime: Par Timer](https://appshunter.io/ios/app/shootontime-par-timer/id6451364120) | 4.9 (695) | Free | Sports |
| [AB Synapse - Garmin](https://appshunter.io/ios/app/ab-synapse-garmin/id1545246660) | 2.0 (23) | Free | Sports |
| [Gorilla FCU](https://appshunter.io/ios/app/gorilla-fcu/id1495839557) | 2.7 (9) | Free | Sports |
| [Ares Alpha](https://appshunter.io/ios/app/ares-alpha/id1467152818) | 4.0 (30) | Free | Sports |
| [Wolverine Airsoft](https://appshunter.io/ios/app/wolverine-airsoft/id6742766867) | 5.0 (3) | Free | Sports |

## More apps by Filip Nemec

- [Leviathan HUD](https://appshunter.io/ios/app/leviathan-hud/id1620162335)

All apps by Filip Nemec: https://appshunter.io/developer/1548918462

## Related topics

[scylla](https://appshunter.io/ios/topics/scylla)

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-24.*