iPhone Screenshots


Make your car sound turbo with the official GReddy Simulator for iPhone, by the creators of iBoost - #1 entertainment app in Japan!

Using iPhone/iPod's built-in accelerometer, the GReddy Simulator calculates how your engine would be boosting as you drive. Customisable GReddy gauges that look just like the real thing show your virtual boost and you can hear the adjustable Type-RZ Blow Off Valve each time you back off and shift. Try out the boost controller, you can see the digital boost readout as you drive and change the boost levels exactly like the real one!

Now with just your iPhone you can experience what its like to have a tuned car with high performance GReddy gear!


★ A laugh every time you change gears in your car
★ GReddy black/white boost gauges in both PSI and kPa
★ Type-RZ blow off valve that you can adjust just like the real thing
★ Illuminated mode for gauges and boost controller at night
★ Amazingly realistic GReddy PRofec B-specII boost controller
★ Friends will think you are way cooler than you actually are
★ Easy one-step calibration
★ Sound effects recorded especially with a real GReddy tuned engine

Plug your iPhone into your car stereo and trick everyone you drive past into thinking you have a high-powered GReddy-tuned ride! PShhhh!

What's New

Version 2.0

Update for Retina graphics
Fixed bug when running in background with iBoost
Improved boost gauge animation

Ratings and Reviews

3.4 out of 5

17 Ratings

17 Ratings

TRUST....this app is greddy quality.


I like it, reminds me of 240sx I used to have, needs to be more sensitive/have the option to turn up sensitivity. I also like iBoost because of this but greddy is a solid app I use more.

Works great


This app worked better than all the other blow off valve apps. This one blows off perfect after every shift. And is a great app for 99cents. Deff better than iboost

Booty smacker


Please add more variety of blow off valves (ie type s)then I'll up my rating to 5 stars


Bonobo Labs
20.6 MB
Requires iOS 4.2 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2010 Bonobo Labs Pty Ltd


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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