Comparison

Fractal Catalog vs Set Theory Foundations

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

Head to head
About

Fractal Catalog

Features
Read full description

In the “Fractal Catalog” iPhone/iPad app, you can see various fractal figures while moving them. ** Fractals handled in “Fractal Catalog” ** C Curve Sierpinski Gasket Sierpinski Carpet Pentaflake Hexaflake Sierpinski Curve Hilbert Curve Peano Curve Moore Curve Koch Curve Koch Snow Flake Gumowski Mira Attractor Julia Set Mandelbrot Set Cellular Automaton Pascal’s Triangle Barnsley Fern Dragon Curve Modified Koch Curve Tree Curve Z Order Curve Minkowski Sausage Vicsek Snow Flake Saltire Vicsek Snow Flake Cross Torn Square Fractal Cantor Set Cantor Dust Gosper Curve Gosper Curve N13 Affine Transformation IFS Ammonite Affine Transformation IFS Tree Affine Transformation IFS Twin Dragon Affine Transformation IFS Branch Affine Transformation IFS Fern 2 Chaos Game Random Walk & Levy Flight Diffusion Limited Aggregation Diffusion Limited Deposition Invasion Percolation Ballistic Aggregation Devil’s Staircase Eden Model Scheidagger River Net

About

Set Theory Foundations

Features
Read full description

Set Theory Foundations is an independent study app for learners who want focused practice in core set theory ideas, proof habits, and common reasoning patterns. It is built for beginners, students reviewing discrete math, interview prep learners, and anyone strengthening mathematical logic skills. Practice across four focused categories: - Fundamentals - Practical Skills - Common Pitfalls - Advanced Concepts Features include: - 160 practice questions - Every question includes an explanation - FSRS spaced-repetition intervals to review at the right time - Weak-point heatmap to show what needs work - Daily challenge for steady progress - Mock exams for timed review - Offline practice with no login required Use short sessions to drill definitions, operations, relations, functions, cardinality, proof techniques, and tricky edge cases. Review missed questions, track weak areas, and build confidence before class, exams, or self-study milestones. Practice offline, no login required. Independent study app for Set Theory Foundations practice. Not affiliated with, endorsed by, or sponsored by any company, certification body, exam operator, or vendor. All trademarks belong to their respective owners.

Screenshots

Fractal Catalog4 screens
Set Theory Foundations4 screens

Verdict

The call

The clearest difference is price: Set Theory Foundations at Free against Fractal Catalog's $2.99. On ads, in-app purchases, device support and iOS requirement 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

Set Theory Foundations is free to download; Fractal Catalog costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Scorecard1 real difference · 5 level
Fractal Catalog versus Set Theory Foundations: the parameters behind the verdict, then further details
ParameterFractal CatalogSet Theory Foundations
Price$2.99Free — better
Update frequencyEvery 10 months—
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.615.1 — better
Further details — not scored
Size4 MB38 MB
Age rating4+4+
DeveloperYasuyoshi OtaAFTW LLC

In-app purchases

None

Fractal Catalog

No in-app purchases

None

Set Theory Foundations

No in-app purchases

Questions

Is Fractal Catalog free?
Fractal Catalog costs $2.99, with no in-app purchases.
Is Set Theory Foundations free?
Set Theory Foundations is free to download, with no in-app purchases.
Do Fractal Catalog or Set Theory Foundations have ads?
Neither Fractal Catalog nor Set Theory Foundations shows ads.

Other comparisons