Comparison

Relatively Simple vs The Relativity Tales

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

Head to head
About

Relatively Simple

This app offers an experiential explanation of Einstein's theory of Special Relativity. Designed by a Carnegie Mellon University professor, it breaks down complex concepts like spacetime and E=mc^2 for a general audience.

Highlights
  • Experiential learning approach
  • Explains Special Relativity
  • Demystifies complex physics concepts
  • Designed by university professor
  • Accessible for general audience
Features
Read full description

When people hear the term "Einstein's theory of Special Relativity", they automatically assume its above their heads. You hear terms like "Space Time" and the famous equation "e=mc^2" and it sounds way too abstract to understand for someone without a PhD in Physics. Designed by Carnegie Mellon University's Dr. Ira Rothstein, this app is aimed at experientially explaining Einstein's theory of special relativity to anybody.

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

Screenshots

Relatively Simple4 screens
The Relativity Tales4 screens

Verdict

The call

The clearest difference is in-app purchases: Relatively Simple at none against The Relativity Tales's 1. Relatively Simple also leads on ads (none vs shown) and ratings volume (7 vs 2). The Relativity Tales's advantage is update cadence (weekly vs monthly). On price, rating, review sentiment 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. Relatively Simple asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Relatively Simple against 5.0 for The Relativity Tales. Both are backed by a comparable volume of ratings — 7 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Relatively Simple ships an update monthly, The Relativity Tales weekly. The most recent releases landed on September 19, 2026 and October 28, 2026 respectively.

Scorecard6 real differences · 4 level
Relatively Simple versus The Relativity Tales: the parameters behind the verdict, then further details
ParameterRelatively SimpleThe Relativity Tales
PriceFreeFree
Rating5.0 (7 ratings)5.0 (2 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings7 — better2
Update frequencyMonthlyWeekly — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS8.0 — better15.0
Further details — not scored
Size434 MB624 MB
Age rating4+9+
DeveloperIra RothsteinSang Heon Park

Customer experience

Relatively Simple

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

The Relativity Tales

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews20 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Relatively Simple

No in-app purchases

1 purchases

The Relativity Tales

One-time1
  • Unlock "The Relativity Tales"$4.99

Questions

Is Relatively Simple free?
Relatively Simple is free to download, with no in-app purchases.
Is The Relativity Tales free?
The Relativity Tales is free to download, with in-app purchases available.
Which has better reviews, Relatively Simple or The Relativity Tales?
Relatively Simple and The Relativity Tales are both rated 5.0 out of 5 on the App Store, from 7 and 2 ratings respectively.
Do Relatively Simple or The Relativity Tales have ads?
The Relativity Tales shows ads; Relatively Simple does not.
Which is updated more often, Relatively Simple or The Relativity Tales?
Relatively Simple ships an update monthly, and The Relativity Tales weekly. Most recently, Relatively Simple was updated on September 19, 2026 and The Relativity Tales on October 28, 2026.

Other comparisons