Question small cameras for apartment security

[G_75]

Hello,

I'm looking for some beginner advice on buying and setting up some cameras. The reason is the landlord of my apartment has been entering the apartment when I'm not there.
I have no idea what it should cost for something that works. I'm looking for something fairly low-budget if possible.

The hardware I have is 1 regular PC, 1 wireless laptop(built-in webcam), 1 huawei android phone.
When away travelling I'll have laptop & phone with me (This is the time he's most likely to be there).

I'm thinking to get ideally 3 or 4 cameras that I could view on my phone in realtime, and that would send alert if intruder or movement detected.
I'd also need it to record the activity in the cloud for example (I'd want it to keep as evidence in case of legal action if it comes to that).

Can someone recommend what cameras to buy from amazon.co.uk, or similar?

I don't know where to start & there seems to be a big variety in prices. Any advice would be really appreciated.

edit: I'm not sure if this is the right forum for this. If not, someone please move it.

 

[Diddly]

I have one of these sort of cameras:
https://www2.yitechnology.com/yi-1080p-dome-camera-2

they work pretty well (infra-red too) and you can access from your mobile phone from anywhere.

 

[G_75]

Thanks, Does that come with its own app or how does that work?
It looks great, but high image resolution etc not so important . I'm looking for something low-cost.

My main concern with this person is theft or damage, so ideally thinking at least 2 cams that could work together.
1 for living area near desk & 1 for the kitchen(where he likes to snoop & turning on appliances etc).

If it would be complicated to have 2 though , I'll just get 1 to start.