100% on the Wyze cameras. You can find them on the shelf at Home Depot, or online at Wyze.com or Amazon. The cost is incredible with cameras starting at under $20.
I have 6, 5 are outside one is inside. My oldest cam has been outside under the eaves at the corner of my roof for 4 years now The app for the phone runs great and is easy to use. At this price point you can't go wrong. Like was said in another comment, just add the mini SD card and you can store locally for a week for free. Add the cheap cloud service and you can store video indefinitely.
For anyone considering a camera, I'd suggest picking one up online or the next time you are at HD. Try it out, I think you might be surprised. I know I was.