Comparison

Calculus Formulas vs Problems

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Calculus Formulas

Features
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CalcRef is the complete calculus reference and study tool built for students. Whether you are preparing for AP Calculus, college exams, or reviewing core concepts, CalcRef puts every formula, table, and practice tool you need in one offline app. FORMULAS Browse over 100 calculus formulas across 8 topics: Limits and Continuity, Derivatives, Applications of Derivatives, Integrals, Techniques of Integration, Applications of Integrals, Sequences and Series, and Parametric, Polar, and Vectors. Every formula includes LaTeX-rendered notation, a plain-language description, conditions for use, and variable definitions. Computational formulas include a built-in calculator with step-by-step solutions. REFERENCE TABLES Six tables provide instant access to the essentials: - Derivative Rules (power, trig, exponential, logarithmic, inverse trig) - Integral Formulas (standard antiderivatives with conditions) - Trigonometric Identities (Pythagorean, double angle, half angle, sum/difference) - Convergence Tests (ratio, root, integral, comparison, alternating series) - Maclaurin Series (common expansions with convergence intervals) - Unit Circle (sin, cos, tan at standard angles in degrees and radians) PRACTICE Test your knowledge with flashcard-style quizzes. Each round presents 10 cards from a chosen topic or a mix of all topics. Flip to reveal each formula, mark it correct or missed, and review your score. Track your progress over time with per-topic stats and quiz history. TOOLS A unit converter covering 16 categories (length, area, volume, mass, force, pressure, temperature, energy, power, velocity, acceleration, density, viscosity, torque, flow rate, and angle) is accessible from any screen. A database of mathematical constants provides precise values for pi, e, the golden ratio, and more. BUILT FOR STUDYING Bookmark formulas to Favorites for quick access. Search finds any formula or constant as you type. Calculation history logs every result. Create and save your own custom formulas. Choose dark or light theme, set decimal precision, and toggle scientific notation. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Problems

Features
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Four fresh puzzles. One daily habit. Turn a spare moment into a satisfying challenge with Problems.cc. Play daily math games, explore past puzzles and build your problem-solving skills one small discovery at a time. FIND YOUR FAVORITE GAME • Crossnumber: a crossword with numbers. Follow interlocking Across and Down clues to deduce the digits. • Magic Square: every line, one magic sum. Make the rows, columns and diagonals add up to the same total. • Summit: small numbers, big possibilities. Choose the operations that reach the target. • Cryptarithm: letters hide, numbers reveal. Give each letter a unique digit to make the equation work. MAKE MATH CLICK Sign in for personalized Practice: a daily set of problems matched to your math rating. Work through multiple-choice and numeric questions. Ask George for hints and follow-up explanations in an optional problem chat, and type or dictate your answer. You review dictated text before submitting it. Chat and some answer checking use OpenAI, with your permission. SEE HOW FAR YOU'VE COME Your Profile brings your math rating, streaks and activity together. Daily games build your playing habit; rated Practice answers shape your math rating. MADE FOR YOUR DAILY BRAIN BREAK • Four fresh math games every day. • An Archive of past puzzles to explore. • Puzzle progress saved as you play, so you can pick up where you left off. • Optional sign-in to sync progress across devices. • Light and dark appearances, rotation and adaptive layouts on iPhone and iPad. • No ads. No account needed for daily games. From Exact Science, the team behind problems.cc. Open today's puzzles and find your next bright idea.

Screenshots

Calculus Formulas4 screens
Problems4 screens

Verdict

The call

The clearest difference is in-app purchases: Problems at none against Calculus Formulas's 3. Calculus Formulas's advantage is iOS requirement (15.1 vs 17.0). On price, ads and device support there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Calculus Formulas sells 3 in-app purchases, starting at $4.99 per 7 days. Problems asks for nothing beyond the download.

Scorecard2 real differences Ā· 4 level
Calculus Formulas versus Problems: the parameters behind the verdict, then further details
ParameterCalculus FormulasProblems
PriceFreeFree
Update frequency—Every 2 weeks
AdsNoNo
In-app purchasesYesNo — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.1 — better17.0
Further details — not scored
Size48 MB10 MB
Age rating4+4+
DeveloperMobin AkhterExact Science

In-app purchases

3 purchases

Calculus Formulas

Subscriptions2
  • Weekly Premium$4.997 Days
  • CalcRef Yearly Premium$44.991 Year
One-time1
  • CalcRef Premium Lifetime$74.99
None

Problems

No in-app purchases

Questions

Is Calculus Formulas free?
Calculus Formulas is free to download, with in-app purchases available.
Is Problems free?
Problems is free to download, with no in-app purchases.
Do Calculus Formulas or Problems have ads?
Neither Calculus Formulas nor Problems shows ads.

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