Disclosed herein are devices and methods that use aqueous two phase systems and lateral flow assays to detect target analytes in a sample. These devices and methods may be used to diagnose a disease or condition in a biological sample, such as blood or serum. In addition, these devices and methods may be used to detect allergens in a food samples or contaminants, such as environmental toxins, in water samples. Device and kit components may be conveniently assembled in a portable container and are amenable to actuation in most settings. The devices are simple to use, requiring a non-trained operator to simply add the sample to the device. Conveniently, the time it takes to detect the target analyte is very short. Thus, the devices and methods disclosed herein provide novel and useful means for point-of-care.