Calculus vs FlagQuest

Study Calculus from A to Z in 10 chapters, all in one app! Then play the in-app Calculus Quiz game to perfect your skills. One Level builds the necessary knowledge for the next Level as you advance. - Suitable for BEGINNERS: Teach yourself Calculus from Zero to the level of a Pro using the HINTS provided. - Adequate for the PROs: Revise and consolidate your Calculus knowledge while facing off with real Pure Math challenges. - Enjoy crisp clear Math text that adjusts its Font size and adapts to both Light and Dark Mode. Featured topics: - Differentiation 1: Curve gradient, Tangents and Normals, Velocity and Acceleration - Differentiation 2: Maxima and Minima, Curve sketching, Second derivative, Small changes - Integration: Reverse differentiation, Area under a curve, Definite integrals, Solids of Revolution, Centres of gravity - Further differentiation: Chain rule, Products and Quotients, Implicit functions, Parameters, Second derivatives - Trigonometry: Radian measure, Trigonometry derivatives, Inverse trigonometry, General solutions - Further Integration 1: Function and derivative, Change of variable, Parameters, Inverse trigonometry - Exponential and Log functions: The exponential function, Deriving y = e^x, The natural logarithm, Logarithmic differentiation - Partial fractions: Linear factors, Quadratic factors, Repeated roots, Improper fractions - Further Integration 2: Integration by parts, Taking dv/dx as 1, Variable t = tan(x/2), Splitting the numerator - Differential equations: Separating variables, Integrating factor, Homogenous equations, Differential problems

Can you name every flag in the world? FlagQuest shows you a flag. You name the country. That's it — but it gets harder than you'd think somewhere around the Balkans. A NEW CHALLENGE EVERY DAY Ten flags, the same ten for everyone on earth, refreshed at midnight. One attempt. Build a daily streak and share your result as a grid of green and red squares — no spoilers. FIVE WAYS TO PLAY - Classic — 15 flags, no clock, no pressure - Blitz — 60 seconds, endless flags, every correct answer buys you 1.5 more - Sudden Death — one wrong answer and the run is over - Marathon — 50 flags straight, for when you mean it - Daily Challenge — the shared ten THREE DIFFICULTIES Easy gives you four choices. Normal gives you six. Hard gives you nothing at all — you type the country name from memory. Hard mode accepts what people actually say, so "Turkey", "Holland", "USA" and "Czech Republic" all count. PICK YOUR CORNER OF THE WORLD Drill one region at a time — Europe, Asia, Africa, the Americas — or take on all 133 countries at once. HINTS WHEN YOU'RE STUCK Cut the options in half, reveal the first letter and continent, or skip and move on. Limited per run, so spend them wisely. IT REMEMBERS WHAT YOU'RE BAD AT FlagQuest tracks every answer and shows you the flags you keep missing, ranked worst first. Get one right three times running and it moves to your Mastered board. Your accuracy, best streak and daily streak are all kept. PLAYS ANYWHERE Save every flag to your device once and the whole game works with no connection — on a plane, on the subway, in a tunnel. NO ACCOUNT. NO ADS. NO TRACKING. Nothing to sign up for, nothing collected, nothing sent anywhere. Your stats live on your phone and nowhere else. Free, forever.