The OnePlus One gained a lot of praise not only for its affordable price tag and solid hardware, but also because it ran Cyanogen OS. While customers may have loved the partnership, the two will likely never partner again.

Cyanogen is going to focus on getting its software on new smartphones, particularly in the rapidly growing Chinese market, and with brands that sell more phones than OnePlus. Meanwhile, OnePlus is going to move forward with its new Oxygen OS. OnePlus said focusing on its own software will allow it to update its phones more rapidly, but it does agree that it probably couldn’t have been as successful without the help of Cyanogen.

“We wouldn’t be where we are today without this joint effort,” OnePlus co-founder Carl Pei said. Cyanogen’s chief technology officer Steve Kondik suggested that there may have been some political struggles between the two companies, too.

“That’s probably the last you will see from that partnership unfortunately,” Kondik told PCWorld. “Two new companies are trying to do crazy stuff, a lot of people collide.” In other words—don’t expect Cyanogen on the OnePlus 2.