Comparison

Trigonometry Formulas vs Chain Reaction

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

Head to head
About

Trigonometry Formulas

Access a comprehensive collection of trigonometry formulas, including ratios, functions, standard angle values, and identities. This app covers basic to advanced topics like inverse circular functions and properties of triangles, serving as a handy reference for students and enthusiasts.

Highlights
  • Trigonometric Ratios and Functions
  • Basic Trigonometric Formulas
  • Standard Angle Values
  • Quadrant Rules of Signs
  • Addition and Subtraction Formulas
  • Inverse Circular Functions
  • Properties of Triangles
Features
Read full description

Contents :- 1.Trigonometric Ratios and Functions 2. Basic Trigonometric Formula 3. Values of Trigonometric Ratios for Standard Angles 4. Quadrant Rules Of Signs 5 .Range of Trigonometric Functions 6. Addition and Subtraction Formula 7. Double, Half and Triple angle Formula 8.Transformation Formula 9. Conditional Identities (when A+B+C = π) 10. Properties of Triangles 11.Inverse Circular Functions 12. Trigonometric Equations and General Values 13.Cosine law,Sine law,Projection law,Half angle Formula,Miscellaneous results 14. Domain and Ranges of Inverse Circular Functions,Important relations on inverse circular Functions

About

Chain Reaction

Features
Read full description

Chain Reaction is a full general-chemistry course and a fast arcade quiz in one app. Read the chapter, then race the clock on what you just read. A COMPLETE WRITTEN COURSE Twenty-one chapters, one per topic, covering the whole Chem 1A + 1B sequence from measurement through organic chemistry. These are not flashcard summaries. The course runs to roughly 143,000 words — about twelve hours of reading — with 213 worked examples that carry real numbers all the way to an answer, and 152 reference tables holding the material chemistry actually requires you to have in front of you: the polyatomic ions, the solubility rules, the strong acids and bases, standard reduction potentials, VSEPR geometries, the functional groups, the decay modes. EVERY NUMBER CHECKED Each worked example was computed and then independently recomputed. Every reference table was verified against standard tabulated values — every Ksp exponent, every formation constant, every half-life, every standard potential. READ A CHAPTER, THEN DRILL IT Every chapter ends with a button that starts a timed run using only that chapter's questions. Chapter practice never touches your Quick Play high score, so you can hammer a weak topic without spoiling a good run. BEAT THE CLOCK Quick Play is an endless blitz across all 21 topics: three lives, rising levels, and a combo multiplier that rewards streaks. Every question is timed, and every miss is followed by the correct answer and a short explanation, so getting one wrong still teaches you something. TWO HUNDRED AND SEVENTY-FOUR QUESTIONS Twelve to fourteen per topic, mixing recall, concept, calculation, trend-reading and spot-the-error. Answer choices reshuffle every time, so nothing can be memorized by position. Wrong answers are built from the mistakes students actually make — the dropped coefficient, the un-converted unit, the reciprocal, the unsquared concentration, pH confused with pOH. TWENTY-ONE TOPICS Measurement · Atoms & Ions · Electrons & Orbitals · Periodic Trends · Bonding · Lewis Structures & VSEPR · Nomenclature · The Mole & Stoichiometry · Reactions & Equations · Aqueous Solutions · Gases · Thermochemistry · Kinetics · Equilibrium · Acids, Bases & Buffers · Intermolecular Forces & States · Thermodynamics · Electrochemistry · Solubility Equilibria · Nuclear Chemistry · Organic & Biomolecules WRITTEN FOR MED AND PRE-MED Every chapter carries a clinical-relevance note — 78 in all. Blood buffering and acid-base disorders, drug ionization and absorption, the Nernst equation behind a resting membrane potential, radioisotopes in imaging, why ice floats and what that has to do with a cell. The chemistry is standard; the examples are the ones a health-science student meets again later. BUILT TO STAY OUT OF YOUR WAY No account. No sign-in. No advertising. No analytics and no tracking of any kind. Everything works offline, and your score stays on your device. Chain Reaction is an independent study aid from BlackFox Media LLC. It is a study aid for educational use and is not medical advice.

Screenshots

Trigonometry Formulas4 screens
Chain Reaction4 screens

Verdict

The call

The clearest difference is update cadence: Chain Reaction at every 3 weeks against Trigonometry Formulas's every 10 months. Trigonometry Formulas's advantage is iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

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

CostPrice · In-app purchases · Ads · Monetization

Trigonometry Formulas costs $0.99 and Chain Reaction $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Trigonometry Formulas ships an update every 10 months, Chain Reaction every 3 weeks. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
Trigonometry Formulas versus Chain Reaction: the parameters behind the verdict, then further details
ParameterTrigonometry FormulasChain Reaction
Price$0.99$0.99
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 10 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size27 MB6 MB
Age rating4+4+
DeveloperRanjeet KumarBlackfox Media LLC

In-app purchases

None

Trigonometry Formulas

No in-app purchases

None

Chain Reaction

No in-app purchases

Questions

Is Trigonometry Formulas free?
Trigonometry Formulas costs $0.99, with no in-app purchases.
Is Chain Reaction free?
Chain Reaction costs $0.99, with no in-app purchases.
Do Trigonometry Formulas or Chain Reaction have ads?
Neither Trigonometry Formulas nor Chain Reaction shows ads.
Which is updated more often, Trigonometry Formulas or Chain Reaction?
Trigonometry Formulas ships an update every 10 months, and Chain Reaction every 3 weeks. Most recently, Trigonometry Formulas was updated on November 3, 2026 and Chain Reaction on October 31, 2026.

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