In recent times I've been using mitmproxy ( https://mitmproxy.org/ ) for almost everything I used to do with charles / fiddler back in 2011.
I use this in conjunction with hostapd to run a wifi network off of the back of a raspberry pi bridged to the main router, which lets me decrypt HTTPS traffic transparently when I need to do some serious app debugging. Of course there's still some setup required on the device to trust custom CA but I find it to be easier to configure than Charles.
I played a bit with mitmproxy last weekend (for the first time). I liked it but to me Charles still seems way more accessible. I'm genuinely curious, what did you find easier to configure?
I use this in conjunction with hostapd to run a wifi network off of the back of a raspberry pi bridged to the main router, which lets me decrypt HTTPS traffic transparently when I need to do some serious app debugging. Of course there's still some setup required on the device to trust custom CA but I find it to be easier to configure than Charles.