Bloons TD 5 is a tower defense game that costs $2.99 and also has in app purchases. It is a great addition to the "Bloons" series that many have stated as the best tower defense game ever. It includes new maps as well as old ones and adds many new features to the game as well.
Ranked in these QuestionsQuestion Ranking
Pro Great depth and variety
There's a great variation in towers, their stats and upgrade trees, as well as enemy types (bloons) and levels you have your battles in.
Pro Clean graphics
The gameplay in previous games (TD4 and lower) was a bit laggy at times, luckily TD5 has cleaned up the graphics to make them a bit more simple while also allowing for new designs that differentiate things in the game in order to make it easier to tell what is going on. The cleaned up graphics also allow for smother gameplay due to them using less resources, meaning no more laggy gameplay.
Pro Co-op mode
Unlocked at rank 10, two players can work together to beat a game, with a set map and difficulty, of Bloons. In co-op mode players can transfer money between them opening up new possibilities of gameplay.
Con In-app purchases
This app does contain in app purchases, and plenty of them. Though they're not necessary for normal play, they are still present, and needed to unlock special perks (double cash mode). Everything else can be purchased with coins and bucks, which can be earned (or bought) through normal game play. They range from $0.99 - $49.99 per item.