"No monthly fee" does not tell you how a security camera records.

Many security cameras can work without a subscription. That label only tells you what you will not pay each month. It does not tell you what gets recorded, where the footage is saved, or how you get it back.

Start with one question: do you need every minute, or just the moments when something happens?

Continuous recording saves video all the time, so you can scroll back through the whole day. Wired systems that record to a box with a hard drive, often called an NVR, are usually built for this. Event recording saves short clips when the camera detects motion or a person. Many battery cameras work this way to save power, so check whether a clip might start after the action does.

Next, check where footage lives. It might be a hard drive at home, a hub, or a memory card inside the camera. A card inside an outdoor camera can be taken along with the camera. Find out how much storage is included and what happens when it fills up.

Then check installation. Wired cameras need a cable run to each spot. Battery and solar cameras are easier to mount but need enough charge or sunlight where they go.

Finally, see what the app includes for free. Some features may still cost extra.

Pick the recording style first, then compare cameras.