Gladiator Heroes is completely free to play, there is however an option to buy using real money some in-game items that will speed up the rate you collect and train your Gladiators. If you prefer not to use this feature you can always disable in-app purchases in your mobile devices settings. Below are some of the most popular in-app purchases along with their cost.
Top In-App Purchases
Diamonds Pack 1 - $4.99 / €5,49
Diamonds Pack 2 - $9.99 / €10,99
Diamonds Pack 3 - $19.99 / €21,99
Become VIP - $2.49 / €2,99
Limited time offer - These will depend on the offer available.