Comparison

Fourier Series Visualiser vs Thesius

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

Head to head
About

Fourier Series Visualiser

Create intricate epicycle drawings by tracing any shape with your finger. This free app visualizes the mathematical principles behind Fourier series, allowing you to adjust coefficients for different approximations and import SVG files for unique artwork. It's perfect for students, teachers, and math enthusiasts.

Highlights
  • Draw custom shapes for epicycle generation
  • Adjust Fourier coefficients for approximation levels
  • Import SVG files for artwork transformation
  • Visualize complex Fourier series analysis
  • Share drawings with friends
Features
Read full description

Your new addictive drawing app that teaches you about one of the most important algorithms in maths. Completely free with no ads or in-app purchases. KEY FEATURES Draw any shape with your finger and watch it transform into a beautiful Fourier epicycle drawing. Adjust the number of Fourier coefficients to see different levels of approximation Import SVG files to transform existing artwork Visualise the maths behind complex Fourier series analysis Share your creations with your friends PERFECT FOR STUDENTS - Learn about Fourier transforms and signal processing TEACHERS - Demonstrate mathematical concepts in the classroom MATHS ENTHUSIASTS - Explore complex mathematical ideas ANYONE who wants to create beautiful drawings and learn about one of the most important algorithms in maths.

About

Thesius

Features
Read full description

Stop Scattered Workflows. Start Moving Forward. Most students—undergrads, masters, PhD candidates—waste time juggling tools, losing ideas, and wondering if their work is actually good enough. Thesius gives that time back. Capture what matters instantly. Get honest feedback before you submit. Stay on track without the chaos of five different apps. What You Get—At Your Level Undergraduates Stop panicking before deadlines. Upload your essay or research paper. Get feedback on clarity, argument strength, and structure before your professor sees it. Learn faster. Submit with confidence. Masters Students Manage multiple complex projects without losing the thread. Track where each one stands. Get feedback that catches gaps before they derail your thesis. Move forward with direction. PhD Candidates Your research is layered. Your timeline is long. Thesius keeps all your work organized, surfaces patterns across projects, and gives you the critical feedback loop you need to stay on track—without waiting for your advisor. What Everyone Gets Real feedback, instantly — Upload a draft. Get the same critical eye your advisor would give—structure problems, weak arguments, missing citations—without the wait. One place for everything — Your ideas, past work, current projects, deadlines. See your progress at a glance. Time back — Built-in focus and smart breaks that work. Finish without burning out. Support when you need it — Stuck? Ask your AI coach. Get answers now, not next week. Your privacy protected — Secure, temporary processing. Your academic integrity stays intact. Available in English. Additional languages coming soon.

Screenshots

Fourier Series Visualiser4 screens
Thesius4 screens

Verdict

The call

The clearest difference is update cadence: Thesius at every 4 days against Fourier Series Visualiser's every 11 months. Thesius also leads on iOS requirement (15.6 vs 26.0). 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Fourier Series Visualiser ships an update every 11 months, Thesius every 4 days. The most recent releases landed on October 24, 2026 and October 8, 2026 respectively.

Scorecard2 real differences · 8 level
Fourier Series Visualiser versus Thesius: the parameters behind the verdict, then further details
ParameterFourier Series VisualiserThesius
PriceFreeFree
Rating3.5 (6 ratings) — better—
Positive reviews33.3% of reviews—
Number of ratings6 — better—
Update frequencyEvery 11 monthsEvery 4 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS26.015.6 — better
Further details — not scored
Size2 MB215 MB
Age rating4+4+
DeveloperJack FinnisSeigneur Consults Limited

In-app purchases

None

Fourier Series Visualiser

No in-app purchases

None

Thesius

No in-app purchases

Questions

Is Fourier Series Visualiser free?
Fourier Series Visualiser is free to download, with no in-app purchases.
Is Thesius free?
Thesius is free to download, with no in-app purchases.
Do Fourier Series Visualiser or Thesius have ads?
Neither Fourier Series Visualiser nor Thesius shows ads.
Which is updated more often, Fourier Series Visualiser or Thesius?
Fourier Series Visualiser ships an update every 11 months, and Thesius every 4 days. Most recently, Fourier Series Visualiser was updated on October 24, 2026 and Thesius on October 8, 2026.

Other comparisons