Comparison

Touch Trigonometry vs Stacked Studying

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

Head to head
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

About

Stacked Studying

This app employs the Pomodoro technique to foster effective study habits and enhance knowledge retention. It integrates study timers and automatic break timers, allowing for customizable durations to suit individual needs. The app offers a free amino acid quiz and over 1500 practice MCAT questions.

Highlights
  • Pomodoro study timer
  • Automatic break timers
  • Customizable timer settings
  • Amino acid quiz
  • 1500+ MCAT practice questions
Features
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Stacked Studying uses the Pomodoro study method to build better habits and strengthen knowledge retention. Timers and breaks are built into the app, so don't worry about setting a separate timer on another device. Once the study timer ends, your break timer automatically starts! Change your settings as needed to fine-tune your study habits, taking longer or shorter breaks as needed. Built for pre-meds, users have access to an amino acid quiz and over 1500 practice MCAT questions for free!

Screenshots

Touch Trigonometry3 screens
Stacked Studying4 screens

Verdict

The call

The clearest difference is in-app purchases: Stacked Studying 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. Stacked Studying asks for nothing beyond the download.

Scorecard2 real differences · 8 level
Touch Trigonometry versus Stacked Studying: the parameters behind the verdict, then further details
ParameterTouch TrigonometryStacked Studying
PriceFreeFree
Rating—5.0 (2 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—2 — better
Update frequency—Every 2 days
AdsNoNo
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhone, iPodiPhone, iPad, Mac — better
Requires iOS15.1 — better17.6
Further details — not scored
Size48 MB18 MB
Age rating4+4+
DeveloperAisatsu LLCJosh Britton

In-app purchases

1 purchases

Touch Trigonometry

One-time1
  • Touch Trigonometry$4.99
None

Stacked Studying

No in-app purchases

Questions

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

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