The "official" way to watch the AFL Grand Final online is via Telstra's AFL Live Official App. However, this can set you back as much as $99, depending on the version you plump for. Fortunately, it's possible to get the price down to just 50 cents by by following these steps.
If you've never signed up for the AFL Live Official App before, you can get a free two-week trial here. Unfortunately, anyone who has signed up previously will not receive the two weeks of free access.
If you can't get the two-week trial, the cheapest way to access the AFL Grand Final online is to sign up for a CrownBet membership. Yes, this is a gambling site - and to watch the AFL Grand Final live you are obligated to place a bet. However, the minimum bet is just 50 cents, which still makes this the most cost-effective online option.
To get your CrownBet membership, click here and follow the prompts. Once you've signed up, you can watch the AFL Grand Final on the AFL Live Vision app by clicking on the "WATCH LIVE" icon. As mentioned, you need to have placed a bet within the past 24 hours for this to work so drop half a buck on the Tigers before the first bounce. (Sorry, Jackson.)
Vision will begin three minutes before the advertised start time and finish shortly after the final siren. If you're keen to watch on a larger display, you should be able to enable screen mirroring via the Chromecast app. Details here.
Note: This article is intended to help you save money, not lose it. If you suspect you have a gambling problem, you can visit Gambling Help Online or call the Gambling Helpline on 1800 858 858.