TimeDilationX vs iRelativity
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TimeDilationX
Calculate time dilation based on Einstein's theories of Special and General Relativity. Compare time differences at various locations and track cumulative dilation over time.
- Special Relativity calculations
- General Relativity calculations
- GPS location integration
- Comparison at different locations
- Cumulative time dilation tracking
- Elapsed time from installation
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TimeDilationX app is calculating time dilation according to Einstein's Theory of Special Relativity, and General relativity equations depend on your GPS location. Compared the time dilation three different locations such as equator, north and south pole. And elapsed time is starting from installation app time and also cumulative time dilation as 10 years has been calculated and shown.
iRelativity
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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
Verdict
The clearest difference is iOS requirement: TimeDilationX at 8.0 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | TimeDilationX | iRelativity |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 8.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 29 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | harun tayfun soylemez | Vladimir Kostadinov Stoyanov |
In-app purchases
TimeDilationX
No in-app purchases
iRelativity
No in-app purchases
Questions
Is TimeDilationX free?
Is iRelativity free?
Do TimeDilationX or iRelativity have ads?
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