I have been using TomTom on my iPhone as my satnav but just bought this brilliant CarPlay tablet. It's priced at £70 but there is a 20% voucher that gets applied at checkout to make it £56 which is less than half the price that these devices usually are. It allows me to run TomTom on my iPhone but have display on the large 1600x600 pixel. Other apps can be run too like BBC Sounds or Podcasts. I believe Android Auto offers similar facilities.
It runs off the cigar lighter & can connect to the car audio via Bluetooth (when I get round to fitting a GROM dongle) or FM transmitter. It is permanently connected & starts up every time the car starts. I'm so impressed with the value for money that I thought I would share the news😀.
10.26" display
4K Front Dash Cam including 64GB SD Card
1080P Reversing Camera (wired)
Car Play & Android Auto
Bluetooth
FM transmitter
https://www.amazon.co.uk/dp/B0FKMRCKPJ?ref=ppx_yo2ov_dt_b_fed_asin_title