Tune Delivery Network TDN is a free Android app developed by HP Tuners LLC for users who have a relationship with a tuner that is part of the TDN system. This app enables your TDN tuner to send you their custom tunes for your vehicle. However, it requires an HP Tuners RTD, MPVI2, or other TDN-compatible delivery device to work.

With Tune Delivery Network TDN, you can easily receive and install custom tunes on your vehicle without leaving your home. This app eliminates the need for in-person tuning sessions, making it a convenient option for those who don't have access to a local tuner. Simply connect your TDN-compatible device to your vehicle and download the tune from your tuner.

Overall, Tune Delivery Network TDN is a great option for those who have a relationship with a TDN tuner and want a simple and hassle-free way to get custom tunes for their vehicle. However, it is not recommended for self-tuners or non-TDN tuners.