Only as long as you cannot load your own certificates, which you are able to in a lot of cases. Though on Android you can lock certificates allowed in a app, th

Only as long as you cannot load your own certificates, which you are able to in a lot of cases. Though on Android you can lock certificates allowed in a app, this can be circumvented though it adds another step. I am unsure if the same is a case for Apples devices, at least you might need jailbreak there.