Grade 9 Science Practice App Review: 1,000 Questions Across 7 Chapters with Step-by-Step Solutions
Grade 9 (Mathayom 3 in Thailand) is where middle school science gets its widest range of topics: genetics, waves and light, the solar system, chemical reactions, electricity and ecosystems. Reading summaries helps, but what really builds exam confidence is working through a Grade 9 science practice app regularly and understanding why each answer is correct.
In this review, ChatStick looks at its new app “ตะลุยโจทย์ วิทย์ ม.3” (Grade 9 Science Practice), a bank of 1,000 science questions across 7 chapters with step-by-step solutions. It follows the Thai core curriculum (IPST) and is built around a simple loop: understand, practice, review, improve. The content is in Thai, and it runs on iPhone and iPad.
App Overview
The app is made specifically for Grade 9 students. Every question comes with an explanation of why the correct choice is right, why the other options are wrong, and a memory tip. A friendly mascot, “Bat”, a scientist bat, keeps students company and cheers them on, which makes long practice sessions feel lighter.
All 7 Grade 9 Science Chapters
The 1,000 questions are organized by the seven Grade 9 science chapters, so students can focus on whatever they are studying in class right now, or sweep through everything before an exam.
Science and Problem Solving
Genetics
Waves and Light
The Solar System and Space
Chemical Reactions and Materials
Electricity
Ecosystems and Biodiversity
Key Features That Make Practice Count
Step-by-step solutions: why the answer is right, why the others are wrong, plus a memory tip
Lesson summaries for every topic: free to read, with newly drawn illustrations
Smart Review: automatically picks the questions you should revisit
Mistake notebook: saves every wrong answer so you can fix it until it sticks
Mock exam modes: Mini Test, chapter tests and a full-length exam
100-Day Challenge: 10 questions a day to finish all 1,000 and build a study habit
Progress stats: accuracy and mastery by chapter and by topic
Gamification: earn XP, level up, unlock badges and keep a study streak
Offline and Dark Mode: core features work without an internet connection
What We Like About It
What sets this app apart from a printed workbook is that the whole study loop lives in one place. Students read an illustrated summary, answer questions, read solutions that explain both right and wrong choices, and then let Smart Review and the mistake notebook bring back the questions they have not mastered yet. Nobody has to keep a separate list of weak spots.
The 100-Day Challenge is a practical way to build discipline: ten questions a day takes little time, and after 100 days a student has covered all 1,000. As exams approach, the chapter and full-length mock exams provide realistic rehearsal.
Tip: read the solution even when you answer correctly. Knowing why the other options are wrong helps you tell similar concepts apart on test day.
App Information
Price: free download; all lesson summaries and full practice for chapters 1–2 are free. Optional “Unlock All Features” in-app purchase: ฿99
Compatibility: iPhone and iPad (iOS / iPadOS 18.0 or later), Mac with Apple M1 chip or later (macOS 15.0), Apple Vision Pro (visionOS 2.0)
Size: about 24 MB
Category: Education, rated 4+
Developer: ChatStick Company Limited
Frequently Asked Questions
Who is this app for?
Grade 9 (M.3) students in Thailand reviewing science for midterms, finals or high school entrance exams, as well as parents and teachers who want practice questions with detailed solutions. The content is in Thai.
What can I use for free?
The download is free, all lesson summaries are free, and chapters 1–2 can be practiced in full. To use every feature across all 7 chapters, there is an optional Unlock All Features purchase for ฿99.
Does it work offline?
Yes. The core features work without an internet connection, so students can practice on the bus, in class or at home.
Is there an app covering Grades 7–9?
Yes. ChatStick also offers a Grades 7–9 science app with 3,000 questions, plus Grade 9 practice apps for English, Thai, social studies and math. Search for ChatStick on the App Store.
Conclusion
If you are looking for a Grade 9 science practice app that covers all seven chapters, explains the reasoning behind every answer and keeps track of weak spots for you, ChatStick’s Grade 9 Science Practice app is well worth trying. Start with the free lesson summaries and chapters 1–2, then decide whether to unlock the rest.
See all ChatStick apps at ChatStick on the App Store
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