Know how to start an H2 Maths question.
Free calculus and vectors practice for Android. You make the first move, and the explanation waits until you ask for it.
- 46questions in calculus and vectors
- FreeNo sign-up, no ads, no data collected
- OfflineWorks without internet. Android only for now.
What you do in the app.
ChoosePick a method, and the clue in the question that points to it. 
MoveSlide a point or turn the 3D picture, and watch what changes. 
CheckCommit to an answer. If it matches a common slip, the slip is named. 
See whyOpen the full explanation when you want it.
46 questions in calculus and vectors.
The questions use the wording of the H2 Mathematics (9758) syllabus for 2026 and 2027.
Calculus
19 questions in 6 topics
- Value and gradient
- Local maxima and minima
- Stationary point tests: the first and second derivative tests
- Greatest value on an interval
- Area optimisation
- Mixed optimisation
Vectors
27 questions in 7 sections, with a short diagnostic
- Points, directions and ratios
- Dot and cross products
- Lines in 3D
- Planes
- Perpendiculars and distances
- Angles between lines and planes
- Choosing the method, with two exam-style questions
Eclat is an independent practice app. It is not endorsed by MOE or SEAB, and it does not cover the whole syllabus.
Before you install.
- Phone
- Android 8.0 or later. There is no iPhone or computer version yet.
- Internet
- Not needed. The app works offline.
- Your data
- None collected. No account, ads or tracking. Answers, notes and scratchpads stay on your phone, and you can save a copy to a file you choose.
- Price
- Free.
- Publisher
- ANTIPHISHING PTE. LTD., trading as Instavar. Made for Eclat Institute and published on Google Play.
Eclat Institute is a tuition centre in Singapore. Free H2 Maths notes are on this website, and our classes are on the H2 Maths tuition page.