HS3 is a completely rebuilt-from-the-ground-up version of HotStreak. It is our next generation app, and we will slowly be migrating all users (and balances, loyalty status, etc.) from the old HotStreak app to HS3 over the coming weeks. Some new features to get excited about:
Lower minimums: place entries as low as $1 (down from $5 in the old app)
Apple Pay support
Instant withdrawals (either to your bank or debit card)
Higher multipliers and bigger max payouts
More stat categories
More alt lines (MLB coming soon!)
Completely revamped UI
And plenty more still to come!