// Production validation complete · App Store release preparation
GhostTune app icon

Tune your MicroSquirt® from your iPhone.
No laptop. No cable.

GhostTune brings full VE, ignition, and AFR table editing, live data, and guarded ECU writes to iPhone and iPad. An independent app, verified on MicroSquirt® hardware running MS2/Extra 3.4.4.

Production validation is complete · App Store release preparation is underway · Local WiFi is required for live ECU communication

MicroSquirtVerified hardware
3.4.4MS2/Extra firmware
WiFiLocal connection
iPhone + iPadSupported devices
No accountLocal-first operation

See GhostTune in action.

A short look at the GhostTune workflow, from launch and live data to table editing and built-in guidance.

The Reel opens on Facebook only after you choose to watch, keeping this page lightweight.

See the workflow.

Actual GhostTune screens covering setup, live monitoring, and ECU configuration.

GhostTune Home screen showing connection and mode controls
Home and connection controls
GhostTune live dashboard showing ECU gauges
Live ECU dashboard
GhostTune ECU setup screen
ECU setup
GhostTune cranking and startup tuning screen
Cranking and startup
GhostTune VE table editor with color-coded cells
VE table editor
GhostTune rev limiter settings screen
Rev limiter

Professional tuning tools without a laptop.

Every screen is designed around a real tuning workflow rather than a desktop interface compressed onto a phone.

VE table editing

Read, edit, temporarily write, burn, and verify the primary VE table with live operating data and cell-level controls.

Ignition and AFR tables

Edit supported ignition and AFR target tables using profile-defined addresses, scales, and guarded write paths.

Live ECU dashboard

Monitor RPM, TPS, MAP, coolant temperature, AFR, intake temperature, battery voltage, and ignition advance.

Startup and calibration

Purpose-built screens for cranking, priming, after-start enrichment, warm-up, sensor calibration, idle, and related setup.

Tune files and backups

Save, compare, export, and restore supported tune data while keeping a known-good backup available.

Ghost Guide

Contextual in-app guidance explains screens, parameters, safety considerations, and common tuning concepts.

Connection diagnostics

Inspect connection health and communication behavior before relying on the link for ECU changes.

Demo Mode

Explore the complete interface with simulated data before connecting to live hardware.

Guarded write workflow

Writes use coordinated polling pauses, response validation, burn sequencing, re-reading, and verification with interruption handling.

A direct local connection.

GhostTune communicates with the ECU through a WiFi-to-RS232 bridge. There is no cloud relay and no cable attached to the iPhone or iPad.

Connect the bridge

Attach a compatible bridge to the ECU diagnostic serial port and provide the bridge with power.

Join its WiFi network

Connect the iPhone or iPad to the bridge’s local access point in device settings.

Verify compatibility

GhostTune identifies the ECU profile and keeps unsupported write paths blocked.

Read, edit, and verify

Back up the tune, make supported changes, and use the guarded temporary-write or permanent-burn workflow.

Verified means tested.

GhostTune does not apply one ECU’s addresses, scales, or write behavior to another platform.

ECU / firmwareStatusNotes
MicroSquirt hardware · MS2/Extra 3.4.4 firmwareVerifiedProduction validation completed for communication, reads, guarded writes, burns, alerts, restoration, protocol handling, and recovery workflows.
Other ECU platforms or firmware versionsNot supportedRemain blocked until profile constants, communication, writes, burns, and safety behavior are independently verified.
Independent compatibility statement: Third-party product and project names are used only to identify the hardware and firmware tested with GhostTune. Crux Resolve LLC and GhostTune are not affiliated with, endorsed by, or sponsored by the owners or developers of those third-party products or projects.

GhostTune FAQ

App Store release preparation is underway.

Production validation is complete for the verified MicroSquirt and MS2/Extra 3.4.4 configuration. Submit the optional form for release updates, new demos, and launch news. Formspree processes the form as explained in the Privacy Policy.

Add setup details (optional — useful for future compatibility work)

By submitting, you ask Crux Resolve LLC to contact you about GhostTune release updates or future compatibility testing. You may request removal at any time through support@cruxresolve.com.