九九チャレ - かけ算の学習をおうえんします is an educational app designed to help children learn multiplication. With this app, children can listen to sample readings of the multiplication tables and challenge themselves with various problems. For parents, there is a feature that allows them to view their child's learning records.

The app offers different types of challenges in the "ちょうせんコース" (Challenge Course) and the "パワーアップコース" (Power-up Course). The "ちょうせんコース" includes problems in ascending order, random order, with missing factors, and word problems. The "パワーアップコース" includes problems in random order, with missing factors, word problems, and questions that the child struggled with before.

The app also provides learning records for both the "ちょうせんコース" and the "パワーアップコース." Parents can view recent learning records, recent incorrect answers, daily progress, and progress by multiplication table. The app allows for up to 10 users, with individual learning records saved for each user.

The "まなびコース" (Learning Course) and the "ちょうせんコース" for multiplication tables 1 to 9 are available for free, while the "パワーアップコース" requires in-app purchases.

Note: The previous "ちょうせんコース" has been converted into the "パワーアップコース" in this updated version.