E-Tuner 4 by Edelbrock is a specialized iOS app designed exclusively for the Pro-Flo 4 EFI System. This app allows users to wirelessly manage and live-tune various ECU settings such as air-fuel ratios, ignition timing, and more directly from their Apple device via Bluetooth.

The setup wizard in E-Tuner 4 simplifies the Pro-Flo 4 EFI setup by guiding users through selecting the appropriate base calibration based on engine displacement and camshaft specifications. Advanced tuning options are available for users who want to fine-tune their vehicle's performance, including adjusting fuel mixtures and ignition timing. Additionally, the app offers vivid gauge displays to monitor engine performance and supports a demo mode for exploring features without being connected to the EFI system.