MilliLog

The ultimate game controller playground: live input testing, DualSense adaptive triggers, haptic rumble, and React battles for up to 4 players, now also on your Mac.

Is your game controller drifting? Missing inputs? Acting inconsistently?

MilliLog helps you find out.

MilliLog is a precision testing and logging tool for game controllers on iPhone and iPad. It records every button press, stick movement, trigger pull, touchpad interaction, and gyroscope event, allowing you to inspect exactly what your controller is doing.

Whether you're debugging a game, testing hardware, or verifying that a controller works correctly, MilliLog turns controller behavior into measurable data.

Features • Monitor multiple controllers simultaneously. • View all inputs in real time. • Export complete input logs as CSV or JSON. • Test haptic feedback with continuous vibration mode for extended testing. • Test DualSense adaptive triggers: set the resistive force of L2 and R2 independently and try Constant, Weapon, Vibration, and Slope effects. • Change controller light colors (supported controllers). • Check battery level. • Play optional sound feedback for inputs. • Includes React, a built-in reaction-time minigame for one to four local players — sign in to Game Center to save your best times to the leaderboard.

Supports any controller compatible with Apple's GameController framework, including DualSense, Xbox Wireless Controller, and many MFi-compatible devices.

Built for developers, QA testers, hardware enthusiasts, repair technicians, and gamers who want objective controller diagnostics.

Perfect for testing stick drift, dead zones, button reliability, vibration motors, adaptive triggers, and overall controller health.

MilliLog is also available on the Mac — one purchase covers iPhone, iPad, and Mac.

No ads. No tracking. No in-app purchases. One purchase. Yours forever.