Which Robo stocks & shares ISA shall I apply for?

I currently have a Barclays Help to Buy ISA account. I will reach the limit in August. I was thinking to transfer £200 to a "Do it for me" stocks and shares ISA account but was unsure which platform to go with. I was reading Martins Saving Expert site and found the below platforms...

  1. Evestor
  2. Nutmeg
  3. Wealthify
  4. Vanguard Life Strategy Funds

Have any of you used the above platforms before and how's your experience? Have you lost a tonne of money or made some profit during the years?

BTW - I have no clue about stocks and shares that's why I wanted someone to do it for me :)