甲種危険物取扱者問題集lite　りすさんシリーズ is a free Android application developed by K.Joker that provides a comprehensive collection of questions to help users prepare for the hazardous materials handling examination. The app enables users to study each subject separately and attempt multiple-choice questions in a format similar to the actual test. The app includes a total of 708 questions, covering topics such as laws, physics, chemistry, and fire extinguishing. Additionally, the app has a two-choice question section, which is ideal for users who find the five-choice question section challenging.

The app's functionality includes a save feature that allows users to stop studying at any time and pick up where they left off. The app also has a progress bar that shows users how many questions they have answered correctly. Furthermore, the app offers a glossary of approximately 160 words related to hazardous materials, which users can access from the top page or while answering questions. The app is available in a Lite version that has advertisements and a paid version that does not require an internet connection.