Hi, 
  
I need to buy something to act as a baby monitor. I've been looking at the range of dedicated babycams and am inclined to get a IP camera that we can view through phones/spare ipad rather than something with a dedicated unit. I've read a number of threads here and elsewhere suggesting different cameras - quite a range of views and some of the most useful posts are a bit dated, so wondering if you could provide an updated view. 
  
Requirements: 
- Good clear video, including in low light and with night vision. 
- Big sensor, less bothered about very  (most seem to be 1/3" but are there good 1/2" or even 1"+ options?) 
- Two way audio. 
- Ideally: local, on-device recording 
- Flexible on power arrangements and form-factor but things that MUST be wall/ceiling mounted are probably out due to this needing to be a baby monitor and occasionally moved about. 
- Cost should ideally be less than the £280/$300 Nest IQ which my partner likes (although I'm less keen about the online streaming requirement it has.) 
  
Any suggestions gratefully received.  
Thanks!