1.13.2: - Fixed rounding problems so the rounding target (integer, tenth, hundredth) now displays correctly and in your language. - Cleaned up the step-by-step solutions for trigonometric and chain-rule derivative problems.

1.13.1: - Now available in Brazilian Portuguese. - New ENEM exam-prep path with authentic, exam-style problems: real-world word problems plus data interpretation with tables and charts. - You can now turn off vibration (haptic feedback) in Profile settings.

1.12.1: - Fixed cases where a correct answer could be marked wrong. The answer checker now accepts more equivalent forms, like writing ln x without parentheses. - Fraction problems now show full step-by-step solutions, from mixed numbers and common denominators to the final reduced answer. - Cleaned up a few geometry problems that could appear with confusing setups.

1.12.0: - Now available in Spanish. - Two new exam-prep paths: Selectividad (Spain) and EXANI-II (Mexico). - Reminders refined: turn the morning and evening reminder on or off separately, and set each time with a picker.

1.11.0: - New problem sets in the topics you practice most: fraction and percent word problems (discounts, growth, original price), comparing fractions, expanding brackets, logarithm shortcuts, and new function evaluation drills. - More variety in popular topics: heavy practice repeats much less. - Smarter answer checking: equivalent forms are now accepted in parametric and polar problems too. - Hints and answer choices fully localized in every language, with cleaner multiple-choice options. - Fixed rare problems that showed letters instead of numbers.

1.10.0: - New: Search. Tap the magnifier in the top bar to jump straight to any topic, subtopic, or exam path instead of digging through menus. - Cleaner home screen, with more room for your topics and progress.

1.9.5: - Fixed money word problems (discounts, interest, expected value) that showed raw formatting instead of clean text. - Probability answer choices now show tidy, fully reduced fractions. - Fixed a polynomial question that could have more than one correct answer, plus assorted formatting fixes.

1.9.4: - Fixed difference-of-squares factoring questions that showed the wrong expression. - Trig identities: added θ, csc, and cot keys so answers like sin(θ) are now typeable. - More accuracy and formatting fixes, including implicit differentiation and limits.

1.9.3: - Math Zen is now available in French. - New exam prep path: French Baccalauréat (spécialité maths): analysis, space geometry, and probability.

1.9.2: navigation fixes. - Tapping a Premium subtopic no longer leaves you stuck on "Loading problems...". You now go straight to the upgrade page. - Several free subtopics in Algebra, Derivatives, Geometry, and Probability that appeared blocked behind a Premium one are now reachable. You can finish those topics end to end without subscribing.

1.9.1: small but important fixes: - Fixed an incorrect perpendicular-slope answer in some Linear Equations problems. - The answer checker now accepts equivalent expressions even when LaTeX brackets differ (e.g. exponents written with or without braces). - Derivative answers display in their simplest form (no more unreduced 2/2 left in coefficients). - Cleaner formatting on inverse-function solutions, plus a small fix to a Chinese question template.

- New: report a problem. Tap the flag on the practice screen to flag a question that looks wrong or unclear, in a couple of taps. - Said your answer was right? The app re-checks it on the spot and tells you if it was actually equivalent. - Reports are saved even offline and send themselves once you're back online.

- Your first problem is now easier, with a quick tip to help you get going. - We'll send a friendly nudge if you haven't tried a problem yet. - Fixed the "all caught up" celebration when you resolve the last mistake in your journal. - Smaller paywall in the first session, so you can breathe.

- Resolve the last mistake in your journal and you'll see a small "all caught up" moment. - Polish on the home mistake card and journal list previews. - Small fixes across navigation and the renderer.

- New: Mistake Journal. Every wrong answer is saved so you can come back later and retry that exact problem type until it clicks. - Daily goal ring on the home screen tracks today's practice at a glance. - Timed mode now remembers your last duration. Long-press the button to switch. - Theory now covers cot, csc, and the quotient rule. - Smarter Continue card: skips topics you've already finished. - Polish across the home screen, stats empty state, and session-end summary. - Bug fixes: derivative answer normalization, Google sign-in deep link, toast clearance under Dynamic Island.

- Practice progress now syncs across your devices - Sign in with Google: faster and more reliable - Fixed: practice progress now decays at the intended pace, not faster - Stats theory now shows both population and sample variance formulas - Polish and bug fixes

- More variety in Matrix Basics practice - "Continue" card on the home screen now updates instantly - Graphs always show the x-axis so curves no longer float off-screen - Fixed rendering in set theory and algebra problems - Bug fixes

- Streak badge on the home screen - "Continue where you left off" card - Share your session results with friends - Weekly recap notifications - Smarter problems across probability and trigonometry - Bug fixes

Bug fixes and performance improvements.

Minor metadata corrections.

Exam Prep is here. - 7 exam prep paths: AP Calc AB/BC, SAT, Gaokao, Suneung, Kyotsuu, Abitur - 100 exam-authentic templates: AP Calc AB (30), SAT Math (35), Gaokao (35) - Multi-part problems with connected reasoning, just like the real test - Korean and German language support (6 languages total) - New topics: Sets & Logic, Plane Geometry, Ratios & Rates - Lifetime premium purchase option

New: Powers & Roots practice — 6 new problem types covering exponent evaluation, power rules, negative exponents, root evaluation, radical simplification, and rationalizing denominators. New: Achievements — earn badges as you progress through topics and hit milestones.

Metadata important fixes for naming

Rebranding fixes and localisation improvements

UI fixes / fixes for some math problems.