Next Rank

 is a Premium Upgrade in Bloons Tower Defense 5 that can be bought for 7. It puts you up to the next rank. This is no longer available once you pass rank 60. It costs 420 to buy this upgrade 39 times and get to the highest rank needed. Generally, it is not worth buying it as it is very expensive for what it does as well as the fact that it is pretty useless before rank 10 and after rank 46.

Trivia

 * Before an update, this premium costed only 3 per rank.