Chem Memo Review: A High School Chemistry App with 13 Chapters, 1,000+ Practice Questions and 27 Mock Exams
Chemistry is the subject many science-track students find hardest in senior high school. You have to understand the concepts, memorize formulas and compound names, and calculate accurately under time pressure. If you are looking for a high school chemistry app that explains topics clearly, gives you plenty of practice and fits in your pocket, this review is for you.
Here ChatStick reviews Chem Memo, a chemistry app for Thai Mathayom 4–6 students (grades 10–12) preparing for the A-Level and TCAS university entrance exams. It combines lesson summaries, a large question bank, timed mock exams and step-by-step chemistry calculators in one place, on both iPhone and iPad. Note that the app content is written in Thai.
Why senior high school chemistry needs a clear summary
Chemistry topics build on each other over three years. If moles and stoichiometry are shaky, acids and bases, chemical equilibrium and electrochemistry quickly become difficult. A structured summary shows how chapters connect, and practicing questions right after reading helps the material stick far better than rereading a textbook.
What is Chem Memo?
Chem Memo aims to help students understand, remember and solve problems across all three senior years in a single app, with a friendly atom character as a study companion. It covers 13 curriculum chapters: matter, atoms and the periodic table, properties of elements, chemical bonding, gases/solids/liquids, stoichiometry, acids and bases, reaction rates, chemical equilibrium, organic chemistry, biomolecules, electrochemistry and polymers.
Key features
65 summary lessons: step-by-step explanations with illustrations, worked examples, common mistakes and memory tips
Three types of notes: must-know points, frequently tested topics and common traps
1,000+ practice questions: every chapter covered, each with the answer, reasoning, method and typical pitfalls; filter by chapter, topic, difficulty or questions you got wrong
27 timed mock exams: full A-Level-style sets, a hard-questions set, midterm and final exams for each grade, and end-of-chapter tests for all 13 chapters
9 chemistry tools: automatic equation balancer, mole, molar mass, concentration and dilution calculators, ideal and combined gas laws, pH calculator and electron configuration with Bohr diagrams; all show step-by-step working
Interactive periodic table: all 118 elements with search, category filters, electron configurations and oxidation numbers
Mind maps and smart review: a mind map for every chapter, flashcards, a mistakes notebook, automatic weak-spot analysis, a study planner and an exam countdown
What you get at a glance
Section | Details |
Lessons | 13 chapters, 65 lessons, grades 10–12 |
Question bank | 1,000+ questions with detailed solutions |
Mock exams | 27 timed sets with a weak-spot summary afterwards |
Chemistry tools | 9 calculators that show the working, not just the answer |
Progress tracking | Exam readiness %, study streaks, XP and accuracy charts by topic |
How to use Chem Memo for A-Level chemistry prep
Open the chapter mind map first to see the big picture.
Read the lesson summary, paying special attention to the frequently tested and common-trap notes.
Practice that chapter's questions straight away and read every solution, even for answers you got right.
Use the calculators to check your own working step by step, for example when balancing equations or finding pH.
Review your mistakes notebook and flashcards regularly, then take timed mock exams as test day approaches.
Tip: set your exam date in the countdown, then use the study planner to spread the chapters across the time you have left.
App information
Price: free to download with core content available right away; unlock all content with a one-time purchase of ฿99 (Unlock All Features)
Compatibility: iPhone and iPad running iOS / iPadOS 18.0 or later
Size: about 30 MB
Usage: core features work offline, no sign-up required
Developer: ChatStick Company Limited
Frequently asked questions
Who is Chem Memo for?
Science-track students in Mathayom 4–6 (grades 10–12) who want a complete chemistry summary, are studying for midterms and finals, or are preparing for the A-Level and TCAS exams. The content is in Thai.
Is it free?
The app is free to download and the core content is open immediately. You can unlock everything with a one-time purchase of ฿99.
Does it work without internet?
Yes. The main features work offline, and you do not need to create an account.
Does the equation balancer only give the answer?
No. Every tool in the app shows step-by-step working, so you can understand where the answer comes from and apply the method yourself.
Conclusion
Chem Memo brings together what senior high school chemistry students need: summaries of all 13 chapters, more than 1,000 practice questions, 27 mock exams, 9 chemistry tools and a 118-element periodic table. It suits daily review as well as focused A-Level preparation. Download it free and start with the chapter you feel least confident about.
See all ChatStick apps at ChatStick on the App Store
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