With its Pixel 4, Google introduced a new method of unlocking to the lineup — a series of secure face unlock sensors. To use the new face unlock method, developers are required to take advantage of Android’s Biometric API, and the popular money app Cash App has now added support for that on Pixel 4 and future devices.

Android smartphones can have as much cool tech as companies can dream of, but implementing it properly relies on apps. Convincing developers to support new features has always been Android’s Achillies heel, and it seems that app problem will be the case with Pixel 4’s face unlock biometrics.