Comparison

Guess the Graph vs Touch Trigonometry

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

Head to head
About

Guess the Graph

This educational app helps students understand mathematical functions by analyzing and reconstructing graphs. It offers interactive challenges with real-time visual feedback, supporting various difficulty levels and function types.

Highlights
  • Interactive graph analysis
  • Function reconstruction challenges
  • Real-time graph updates
  • Multiple difficulty levels
  • Custom math input interface
  • Built-in cheat sheet
Read full description

Graph Detective is an interactive educational app that helps students build intuition about mathematical functions by analyzing graphs instead of memorizing formulas. Players are shown a graph without its equation and are challenged to reconstruct the underlying function by adjusting parameters or entering expressions. As users experiment, the graph updates in real time, encouraging exploration and hypothesis testing. The app supports multiple difficulty levels: Easy: Explore quadratic and linear functions using sliders Medium: Enter full expressions including trigonometric, exponential, and logarithmic functions Hard: Analyze composite and piecewise functions with minimal hints Graph Detective features a custom math input interface optimized for learning, optional hardware keyboard support, and a built-in cheat sheet that explains common graph patterns and transformations.

About

Touch Trigonometry

Features
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Finally understand trigonometry. Touch Trigonometry is the most intuitive way to learn the trigonometric functions. Instead of memorizing formulas, you'll see how sin, cos, tan, and the rest actually work—by touching and exploring a live unit circle and graph. Drag your finger around the circle and watch trig functions respond in real time. You'll be amazed at how quickly the "true meaning" of trigonometry becomes clear. Watch the graph on the right trace their values. In seconds, concepts that confused you for years will suddenly click. This app is great for students struggling with trigonometry or anyone looking for a refresher. HOW IT WORKS On the left: an interactive unit circle. Touch anywhere and drag to change the angle θ (theta). A triangle forms showing the relationships between the angle and the trig values. On the right: live graphs of all six trig functions. As you move the angle, dots trace along each curve showing the current value. Touch the graph side to control the angle from there too. It's bidirectional, immediate, and intuitive. No tutorial needed—just touch and explore. Users have told us that they never understood *why* the trig functions existed—until they used this app. From students to the math curious, Touch Trigonometry offers a truly intuitive way to understand one of the trickiest parts of geometry—at your fingertips! FEATURES • Interactive unit circle with touch control • All 6 trig functions: sin, cos, tan, sec, csc, cot • Live function graphs with real-time value tracking • Bidirectional control (circle or graph) • Right triangle overlay showing opposite/adjacent/hypotenuse • Reference angle markers (30°, 45°, 60°, 90°, etc.) • Switch between degrees and radians • Snap-to-reference-angles mode • Pinch to zoom the graph • Colorblind-friendly color palette • Clean dark theme, no distractions • No ads, no account required WHO IT'S FOR • High school & college students learning trig • Teachers demonstrating concepts in class • Engineers & scientists refreshing fundamentals • Anyone who was told to "just memorize SOHCAHTOA" • Visual learners who need to see it to get it FREE FEATURES • Full unit circle interaction • Sine visualization • Triangle overlay • Degree/radian switching • All UI customization options UNLOCK EVERYTHING (One-Time Purchase) • One-time purchase for lifetime access to all paid features • Cosine, tangent, secant, cosecant, cotangent • All future paid features

Screenshots

Guess the Graph4 screens
Touch Trigonometry3 screens

Verdict

The call

The clearest difference is in-app purchases: Guess the Graph at none against Touch Trigonometry's 1. Touch Trigonometry's advantage is iOS requirement (15.1 vs 17.6). On price, ads 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

Both are free to download. Touch Trigonometry sells 1 one-off in-app purchase. Guess the Graph asks for nothing beyond the download.

Scorecard2 real differences · 6 level
Guess the Graph versus Touch Trigonometry: the parameters behind the verdict, then further details
ParameterGuess the GraphTouch Trigonometry
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, Mac — betteriPhone, iPod
Requires iOS17.615.1 — better
Further details — not scored
Size4 MB48 MB
Age rating9+4+
DeveloperTianze GuanAisatsu LLC

In-app purchases

None

Guess the Graph

No in-app purchases

1 purchases

Touch Trigonometry

One-time1
  • Touch Trigonometry$4.99

Questions

Is Guess the Graph free?
Guess the Graph is free to download, with no in-app purchases.
Is Touch Trigonometry free?
Touch Trigonometry is free to download, with in-app purchases available.
Do Guess the Graph or Touch Trigonometry have ads?
Neither Guess the Graph nor Touch Trigonometry shows ads.

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