Comparison

해시칼리지 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

해시칼리지

Features
Read full description

정준희의 해시티비가 선보이는, 지식과 지혜의 교류 공간 해시칼리지. 그 주의 핵심 뉴스만을 비판적으로 골라볼 수 있는 주간 뉴스레터가 제공되며, 뉴스 외에도 다양한 도서, 다큐멘터리, 드라마, 영화에 대한 이야기를 나눌, 믿을만한 큐레이터들이 모입니다. 정준희 교수와 함께 하는 여러 학자, 전문가들의 지식 칼럼이나 에세이도 읽어보실 수 있습니다. 자유게시판을 통해 칼리지 각 지역, 나라들에 산재해 있는 벗들과 교류합니다. 회원으로 가입하시면, 등록 조건에 따라 다양한 콘텐츠와 참여 기회를 얻으실 수 있습니다. 미디어를 통해 세상을 바라보는 깨달음과 생활의 지혜 그리고 삶의 철학을 담은 콘텐츠로 여러분을 초대합니다. 신선한 통찰을 담은 온/오프라인 강의와 대담, 토크쇼, 수시로 열리는 독서, 드라마/영화 감상 공동체에 참여할 여러 기회도 제공합니다.

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

해시칼리지4 screens
The Relativity Tales4 screens

Verdict

The call

The clearest difference is in-app purchases: 해시칼리지 at none against The Relativity Tales's 1. 해시칼리지 also leads on ads (none vs shown). The Relativity Tales's advantage is update cadence (weekly vs every 2 months). On price, 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

Both are free to download. The Relativity Tales sells 1 one-off in-app purchase. 해시칼리지 asks for nothing beyond the download.

UpkeepUpdate frequency

해시칼리지 ships an update every 2 months, The Relativity Tales weekly. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

Scorecard3 real differences · 7 level
해시칼리지 versus The Relativity Tales: the parameters behind the verdict, then further details
Parameter해시칼리지The Relativity Tales
PriceFreeFree
Rating—5.0 (2 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—2 — better
Update frequencyEvery 2 monthsWeekly — better
AdsNo — betterYes
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size31 MB624 MB
Age rating17+9+
DeveloperSecondQ Lab Co., Ltd.Sang Heon Park

In-app purchases

None

해시칼리지

No in-app purchases

1 purchases

The Relativity Tales

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

Questions

Is 해시칼리지 free?
해시칼리지 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.
Do 해시칼리지 or The Relativity Tales have ads?
The Relativity Tales shows ads; 해시칼리지 does not.
Which is updated more often, 해시칼리지 or The Relativity Tales?
해시칼리지 ships an update every 2 months, and The Relativity Tales weekly. Most recently, 해시칼리지 was updated on November 4, 2026 and The Relativity Tales on October 30, 2026.

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