Allie Challenges are a feature in Where's My Water? Like Cranky Challenges, they serve as special challenges that correspond with Allie's Story, though they appear in Swampy and Cranky levels as well. Also similar to Cranky Challenges, the challenges come in sets of three; currently four sets have been released, with the first being free to play. The rest will be unlocked if the player purchases Allie's Story as an in-app purchase for $1.99 USD. However, when the player completes a challenge set, instead of a bonus level being unlocked, a song is unlocked that the player can listen to; these songs include short, instrumental covers of popular Disney scores. In addition to having the ability to be listened to at any time, these songs can also play after the player beats an Allie level, on the scoring screen.
Cranky Challenges usually focused on a variety of tasks, however all Allie Challenges consist of one main task; filling up the musical notes around the level in the correct order, with the notes being added into the level, modifying it. However, different fluids will need to be used to fill them up for different challenges. The musical notes must be filled up in the order specified in the top-left corner of the screen from left-to-right, if the player makes one mistake, the challenge will need to be restarted.
List of Allie Challenges