Comparison

The Relativity Tales vs SpaceFold

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

Head to head
About

The Relativity Tales

Explore the principles of special relativity through interactive thought experiments and engaging narratives. This app transforms complex scientific concepts into intuitive experiences, making science accessible and emotionally resonant.

Highlights
  • Interactive thought experiments
  • Narrative-driven learning
  • Intuitive science exploration
  • Exploration of spacetime concepts
  • Courtroom thriller scenarios
  • Space exploration narratives
Features
Read full description

What if you ran close to the speed of light − would time really slow down? The Relativity Tales is an interactive science story that lets you experience Einstein's special relativity with your fingertips, no equations required. Play with the principles yourself, then step into stories where those very principles become the key. ■ Fingertips, not formulas Run the thought experiments Einstein could only perform in his head, right on your screen. Watch time flow differently for someone in motion, lengths shrink, and the very idea of "at the same time" fall apart before your eyes. ■ Stories where science is the plot Every principle you experience becomes the key to a story. · A courtroom thriller where the relativity of simultaneity cracks an impossible alibi · An explorer's dream of reaching the edge of the universe, made possible by length contraction · A moment where time seems to stand still, born from time dilation The moment you understand the science, the story starts to look different. ■ Contents Chapter 1. Lorentz Transformation − The invisible rules of spacetime Chapter 2. Relativity of Simultaneity − When "simultaneous" falls apart Chapter 3. A Story of Simultaneity − A spacetime-trick courtroom thriller Chapter 4. Length Contraction − The secret of shrinking distance Chapter 5. A Story of Length Contraction − An explorer's longing dream Chapter 6. Time Dilation − Does time keep a different beat? Chapter 7. A Story of Time Dilation − The moment time seemed to stop Chapter 8. Lorentz Playground − Lorentz transformation, your way ■ Perfect for - Science lovers who get a headache at the sight of equations - Anyone who watches a sci-fi movie and wants to know the science behind it - Anyone who's ever wondered, "So what IS relativity, anyway?" - Parents who want to share the wonder of science with their kids - Teachers looking for a great tool to show relativity in class ■ Good to know The first 3 chapters are free to play. The remaining chapters can be unlocked with an in-app purchase. School and institution inquiries: phyilm.official@gmail.com Take the equations out of science, add a story, and what remains is wonder. (science − equation + story = wonder) phyilm

About

SpaceFold

Features
Read full description

SpaceFold is an interactive AR learning experience that transforms the Theory of Relativity into something you can see, explore, and understand. Instead of relying on complex equations, SpaceFold uses Augmented Reality, interactive simulations, and intelligent explanations to help users build an intuitive understanding of space, time, and motion. FEATURES • Spacetime Fabric Place a spacetime grid in your environment and watch it bend under the influence of mass. Explore gravity as the curvature of spacetime and discover how objects naturally move through curved geometry. • Time Walk Become a moving observer and experience the effects of time dilation. Compare clocks, explore motion near light speed, and understand how time changes depending on your journey. • Observer Perspective Switch between different reference frames and see how events can appear differently to different observers. Learn why simultaneity is relative and why there is no universal clock. • Intelligent Explanations Powered by Apple Foundation Models, SpaceFold provides contextual explanations based on your interactions, helping transform observations into understanding. WHY SpaceFold? Physics is often taught through equations and diagrams. SpaceFold takes a different approach by allowing users to interact directly with the concepts behind relativity through immersive AR experiences. Whether you're a student or simply curious about the universe, SpaceFold offers a visual and intuitive way to explore one of the most fascinating ideas in modern physics. Experience physics. See space. Fold time.

Screenshots

The Relativity Tales4 screens
SpaceFold4 screens

Verdict

The call

The clearest difference is in-app purchases: SpaceFold at none against The Relativity Tales's 1. SpaceFold also leads on ads (none vs shown). The Relativity Tales's advantage is iOS requirement (15.0 vs 26.0). 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. The Relativity Tales sells 1 one-off in-app purchase. SpaceFold asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

Scorecard3 real differences · 7 level
The Relativity Tales versus SpaceFold: the parameters behind the verdict, then further details
ParameterThe Relativity TalesSpaceFold
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyWeeklyWeekly
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better26.0
Further details — not scored
Size624 MB6 MB
Age rating9+4+
DeveloperSang Heon ParkGALGOTIAS UNIVERSITY,SCHOOL OF BUSINESS

In-app purchases

1 purchases

The Relativity Tales

One-time1
  • Unlock "The Relativity Tales"$4.99
None

SpaceFold

No in-app purchases

Questions

Is The Relativity Tales free?
The Relativity Tales is free to download, with in-app purchases available.
Is SpaceFold free?
SpaceFold is free to download, with no in-app purchases.
Do The Relativity Tales or SpaceFold have ads?
The Relativity Tales shows ads; SpaceFold does not.
Which is updated more often, The Relativity Tales or SpaceFold?
The Relativity Tales ships an update weekly, and SpaceFold weekly. Most recently, The Relativity Tales was updated on October 28, 2026 and SpaceFold on October 25, 2026.

Other comparisons