Leviathan & Scylla by JeffTron

3.9
163 reviews
10K+
Downloads
Content rating
Everyone
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image

About this app

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.
Recommended specs: Android 5.1.0 or above and at least 1GB of RAM.
We are constantly optimizing application and adding new features for free.
Updated on
10 Jul 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection

Ratings and reviews

3.8
160 reviews
A Google user
23 April 2020
I really enjoy this app, and the electronics so far, it lets you adjust basically everything on the gun !! The only thing I would recommend is the option to "reset" the errors, cause they stay in the memory even when I log out and log in again. (Update: Error clean log now available, it's awesome!)
5 people found this review helpful
Did you find this helpful?
Jefftron
23 April 2020
reset errors in the error log was added in version 2.1.0
DRD
23 May 2024
The app works really well. The only part which is difficult is the Bluetooth connection which often drops while browsing through the app or when you lock and unlock the phone
Did you find this helpful?
D E
5 August 2024
Works well, great on the fly tuning. Unless ive overlooked it somewhere, i wish it had magprime. Edit: per developer response i now have magprime activated! Thanks!
Did you find this helpful?
Jefftron
5 August 2024
hello, "magprime" is on SAFE position, set it as "activate output" and when you pull the trigger on sAFE, it will load your magazine

What's new

- Added technical lock feature
- Fixed negative values in temperature

App support

About the developer
Ing. Filip Němec
support@jefftron.cz
599 Zahradní 538 03 Heřmanův Městec Czechia
+420 776 110 204