That would likely depend more on the vehicle you're testing than the scan tool you're using. Some makes/models will provide a bidirectional control of the starter relay, some won't. For example, of the three cars in my driveway, only one will allow you to run the starter from the scan tool.
In short, there are still gonna be some times you'll need a remote starter switch. As an alternative, you can look into some relay testing sets, like this Lisle kit:
www.amazon.com/Lisle-69300-Master-Relay-Test/dp/B00CRQSYY4
Using the tester gives you easy access to the control side of a relay, making controlling the relay a breeze. Plus, it's a great kit on its own, aside from acting as a remote switch. And it'll come in handy for those vehicles were the starter is difficult to access. It's more expensive, but way more versatile.
If you want to buy-one-cry-once, there's also the uActivate kit:
www.aeswave.com/uActivate-Master-Kit-p10395.html
