Meet the Amcrest NV1104 NVR: a network video recorder that supports up to 4TB of storage. You can record from up to 4 x 1080p WiFi cameras @ 30 fps. You will be able to search, backup, and playback videos easily. The device offers remote access using Windows and Mac browsers.
This Amcrest NVR is compatible with iOS and Android devices. It has various recording modes (scheduled, motion detection, …). Costs under $80 at this time.