Comparison

Relativistic Space vs iRelativity

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

Head to head
About

Relativistic Space

This educational tool simulates the behavior of space and time at high speeds. Developed as part of a master's dissertation, it focuses on relativistic effects without considering acceleration.

Highlights
  • Relativistic velocity simulation
  • Space-time behavior visualization
  • Pedagogical tool
  • Master's dissertation project
Features
Read full description

This simple simulator shows how space and time behave at relativistic velocities. It was developed as a pedagogical tool as part of a master's dissertation at the Federal University of Espírito Santo. Thus, it does not take into account the acceleration effects of the spacecraft. It was developed in a partnership between Prof Thiéberson Gomes (UFES), Prof Flávio Gimenes (UFES) and student Luiz Henrique Gobbi, with computational support Rodrigo Marques.

About

iRelativity

Features
Read full description

Every time you move, time passes slightly slower for you than for someone standing still. That's not science fiction — it's special relativity, and it's happening to you right now. iRelativity uses your real GPS speed to calculate exactly how much time dilation you're experiencing. Every trip, every commute, every flight adds a tiny slice of time to your lifetime total. The faster you travel, the more you save. Features • Live time dilation — your phone's GPS feeds real velocity into the Lorentz equation in real time • Lifetime total — watch your accumulated time saved grow across every journey, displayed in the most readable unit from femtoseconds up to seconds • Daily history — a chart of how much time you've saved each day • Global leaderboard — compare your lifetime total with other travellers via Game Center • What-if simulator — drag a slider toward the speed of light and see what time dilation would feel like at 0.9 c • Learn tab — interactive animations of the light clock and Einstein's train thought experiment, with a Lorentz factor calculator The numbers are real. At highway speeds you save about a nanosecond per hour. Board a plane and that climbs to microseconds. The physics is identical to the corrections that keep GPS satellites accurate every day.

Screenshots

Relativistic Space4 screens
iRelativity4 screens

Verdict

The call

The clearest difference is iOS requirement: Relativistic Space at 13.0 against iRelativity's 18.6. 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.

Scorecard1 real difference · 9 level
Relativistic Space versus iRelativity: the parameters behind the verdict, then further details
ParameterRelativistic SpaceiRelativity
PriceFreeFree
Rating3.7 (3 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 75 months—
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better18.6
Further details — not scored
Size52 MB1 MB
Age rating4+4+
DeveloperThieberson GomesVladimir Kostadinov Stoyanov

In-app purchases

None

Relativistic Space

No in-app purchases

None

iRelativity

No in-app purchases

Questions

Is Relativistic Space free?
Relativistic Space is free to download, with no in-app purchases.
Is iRelativity free?
iRelativity is free to download, with no in-app purchases.
Do Relativistic Space or iRelativity have ads?
Neither Relativistic Space nor iRelativity shows ads.

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