Sometimes, this is all you need for some quick mobile debugging.

dumb-console.html

<script src="//catdad.github.io/tiny.cdn/lib/toast/1.0.0/toast.min.js"></script>
<script>
    (function () {
        function logger(type) {
            return function () {
                toast[type]([].reduce.call(arguments, function (memo, arg) {
                    return memo + ' ' + arg.toString();
                }, ''));
            };
        }

        window.console = {
            log: logger('log'),
            error: logger('error')
        };
    }());
</script>