Comparison

GT Graph vs FlashZen

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

Head to head
About

GT Graph

Read full description

GT Graph transforms your device into a powerful mathematical visualization tool. Plot equations, explore calculus concepts, and bring mathematics to life with stunning interactive graphs. PLOT ANY EQUATION - Cartesian functions - Polar curves - Parametric equations - Implicit equations - Inequalities with shaded regions INTUITIVE INPUT Type equations naturally with implicit multiplication support. Write 2x instead of 2*x, or 2sin(x) instead of 2*sin(x). GT Graph understands mathematical notation the way you write it. COMPREHENSIVE FUNCTION LIBRARY - Trigonometric: sin, cos, tan, sec, csc, cot - Inverse trigonometric: asin, acos, atan - Hyperbolic: sinh, cosh, tanh - Exponential and logarithmic: exp, ln, log, log2 - Power functions: sqrt, cbrt, abs - Constants: pi, e, phi (golden ratio) MULTIPLE GRID TYPES - Standard Cartesian grid - Trigonometric grid with pi-labeled axes - Polar coordinate grid with radial lines - Logarithmic scale grid CALCULUS TOOLS - Calculate derivatives at any point - Compute definite integrals with visual shading - Find zeros (roots) of functions - Locate local minima and maxima - Generate value tables INTERACTIVE EXPLORATION - Pinch to zoom, drag to pan - Tap to show tangent lines - Crosshair cursor displays coordinates - Plot multiple equations simultaneously - Color-coded graphs for easy identification SAVE AND SHARE - Save your work as .gtgraph files - Export and share with colleagues - Equation history saves your last 25 entries - Settings persist between sessions Perfect for: - Students learning algebra, trigonometry, and calculus - Teachers creating visual demonstrations - Engineers and scientists visualizing data - Anyone curious about mathematical beauty GT Graph combines the power of professional graphing software with the elegance of modern design. Start plotting today!

About

FlashZen

This app helps you learn vocabulary and build memory through active recall and spaced repetition. It offers a clean interface, allows custom definitions, and generates practice sentences with corrections. It's designed for efficient, focused study.

Highlights
  • Spaced repetition system
  • 800+ high-frequency English words
  • Custom definitions and translations
  • Sentence generation with corrections
  • Clean flashcard interface
  • Import custom decks
Features
Read full description

With FlashZen you get: • 800+ high-frequency English words • Organized for efficient learning • Clean flashcard interface • Add your own definitions or translations • Generate sentences from known words and get corrections Active recall builds real memory. Built-In Spaced Repetition ---- FlashZen uses spaced repetition to help you: • Review at the perfect time • Strengthen long-term memory • Avoid forgetting • Study efficiently Perfect for: - Students - TOEFL / IELTS prep - Self-learners - Travelers - Vocabulary building ---- Why FlashZen? • No complex setup • No technical interface • Option to import decks • Clean, focused experience • 100% free Open the app. Start learning.

Screenshots

GT Graph4 screens
FlashZen4 screens

Verdict

The call

The clearest difference is in-app purchases: FlashZen at none against GT Graph's 1. FlashZen also leads on iOS requirement (15.1 vs 18.0). GT Graph's advantage is ads (none vs shown). On price, update cadence 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. GT Graph sells 1 one-off in-app purchase. FlashZen asks for nothing beyond the download.

UpkeepUpdate frequency

GT Graph ships an update every 8 days, FlashZen every 9 days. The most recent releases landed on September 7, 2026 and September 14, 2026 respectively.

Scorecard3 real differences · 7 level
GT Graph versus FlashZen: the parameters behind the verdict, then further details
ParameterGT GraphFlashZen
PriceFreeFree
Rating—5.0 (2 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—2 — better
Update frequencyEvery 8 days — betterEvery 9 days
AdsNo — betterYes
In-app purchasesYesNo — better
Monetization—Ad-supported
DevicesiPhone, iPad, Mac — betteriPhone, iPod
Requires iOS18.015.1 — better
Further details — not scored
Size1 MB29 MB
Age rating4+4+
DeveloperGennaro Eduardo TangariBaptiste Fehrenbach

In-app purchases

1 purchases

GT Graph

One-time1
  • GT Graph In-App Purchase$0.99
None

FlashZen

No in-app purchases

Questions

Is GT Graph free?
GT Graph is free to download, with in-app purchases available.
Is FlashZen free?
FlashZen is free to download, with no in-app purchases.
Do GT Graph or FlashZen have ads?
FlashZen shows ads; GT Graph does not.
Which is updated more often, GT Graph or FlashZen?
GT Graph ships an update every 8 days, and FlashZen every 9 days. Most recently, GT Graph was updated on September 7, 2026 and FlashZen on September 14, 2026.

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