hello to eFly

E-Fly is high technology product made by Iter srl. The Italian company has a huge background experience in 3d measurements. Starting with aerial photogrammetry and then moving to sports.
Iter is the manufacturer of sports sensors and app for 3d analysis. Capto Golf is leader technology in golf for putting analysis.
E-fly is a new tool for fly fishing casting improving.


The good fisherman who knows the casting technique does not know why a cast really comes well. The system makes him understand what are the times, rhythms and accelerations to have a good cast.

eFly App Start Up Screen


eFly allows you to analyse the movement of both the fisherman and the rod simultaneously. Uses very light sensors with a long battery life and simple interface to the device

eFly App Cast Analysis Screen


The system makes him understand what are the times, rhythms and accelerations to have a good cast The good cast is given by a set of many aspects of the movement, with the system it’s possible to analyse and review and try to replicate  It’s fundamental to improve, to know how cast has been

eFly App Cast Analysis Screen

Every Detail

The device manages the 4 sensors and captures the data together with the video at 30 hertz. Each frame is associated with a complete dataset of accelerations, speeds and positions in 3d of the 4 sensors. Simultaneous analysis of video and inertial data allows you to make great interesting considerations in casting.

EFLY Presentation

Tech Specs


Accurate output data: 3-axis XYZ (Pitch Roll Yaw) Acceleration + Gyro + Angle+ Magnetic field


29 grams


23.0 x 36.5 x 40.0 mm


Rod - Quick action screw fixing
Arm - Strap


Bluetooth 5.0
Bluetooth coverage range: within 50 meters (without obstacles like walls)


Low consumption solid state
10 hour Battery Life


Sensor - Black
Arm Band - Black with red stitching

Analyse, Learn, Improve

Every cast can be recorded and reviewed by date. Each cast can be segmented into a single loop and can be analysed individually.


Parameters for every loop are in 3 phases:
Back cast
Transition (pause)
Forward cast


For the back and forward cast we have 3D positions of maximum pull and maximum velocity. Execution Time is calculated with accuracy enabling us to accurately estimate pace, tempo and time.

Pace is calculated by subdivision of back-pause and forward cast.
Tempo is the ratio between back and forward cast.
Time is the total time (in seconds of the back and forward cast.

3D Planes

The 3D position of the rod during the back and forward cast have been interpolated.

3D planes of the back cast and forward cast are very informative to determine the geometry of cast made.

For every 2D plane we provide pan and tilt angles.

In the analysis it is represented by a curve line. The rod tip trace (the tip is calculated 1 meter from rod butt ) There is also representation of rod butt track for describing the rotation about the rod shaft. We represent a point at 20 cm from butt in front of the reel