Hi Sam, the app is called Road Trip. I add the data in after every fill and I use it to track all expenses such as registration, etc.
My ISF is stock apart from an X-Force cat back. Purchased when it had around 48k, has not missed a beat at all. If you check out the mileage threads on clublexus forums you'll see plenty of cars there well over 200,000kms with only general maintenance. Being a lexus they are rock solid. I'm on my third lexus now and every single one has been completely reliable.