Yes, Livescore is free for Android.

How do I use a Bonus Bet? To use your Bonus Bet, put your desired selection in the bet slip. You will see in the bet slip an option to use a 'Bonus Bet' for this bet. Note: Bonus Bets are not displayed in your account balance.

Wager the bonus amount five times in accumulator bets with a minimum value of 1.40. Promising to double the value of your deposit with a 200% match up to the maximum value of 100000, Betwinner's bonus amount will be credited to your account automatically after placing your first deposit.