# 相対性理論計 — 時間のずれを見る万歩計のおもちゃ

> 時間のずれを見る万歩計のおもちゃ (iPhone/iPad app by TAKEHITO AWASHIMA.)

- Source: https://appshunter.io/ios/app/id6804165772 (this page in markdown: same URL + `.md`)
- Developer: [TAKEHITO AWASHIMA](https://appshunter.io/developer/1886038610)
- Category: Education, Lifestyle
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 4 MB
- Languages: Japanese
- Released: 2026-08-25
- Data updated: 2026-08-27
- User reviews in markdown: https://appshunter.io/ios/app/id6804165772/reviews.md

## What is 相対性理論計?

Instead of a pedometer — Einstein’s “time drift.”

A grand thought experiment (Gedankenexperiment) you can carry in your pocket.
The formulas are real. The measuring is rough GPS.

Walk. Take the train. Climb the stairs.
Just living as usual already opens a tiny gap between you and “the you who stayed where you woke this morning.”

Relativity Meter is an everyday toy for peeking at that stretch and squeeze of time hidden in a day’s steps — blown up to the absurd scale of × 10⁻¹⁴ seconds.

• Blue = time slows (speed: special relativity)
• Red = time advances (height: gravitational redshift)
• The number on the home screen = today’s net drift from both

We use Einstein’s equations as they are (Δt ≈ t·v²/(2c²) and Δt ≈ t·gh/c²). The sensor side is phone GPS. Not a lab instrument — a toy for finding wonder in ordinary steps.

Privacy you can trust
No account. Fully offline. Location is computed on-device only and is never sent to any server.
(On Apple Watch, you can glance at today’s number on your wrist.)

Made by Lagado Lab.


## Version history (last 2 releases)

### 1.0.1 — 2026-08-26

Clearer tutorial, plus “what-if” sample trips (walk, Ginkaku-ji to Daimonji, shinkansen, flight).

Today’s number is the net of time slowing (speed) and advancing (height)—blue vs red. Display units and copy are polished.

### 1.0 — 2026-08-25

No release notes.

## More apps by TAKEHITO AWASHIMA

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- [アボモンゲーム](https://appshunter.io/ios/app/id6767998877)
- [わすれメモ - 忘れていい買いものメモ](https://appshunter.io/ios/app/id6794892342)
- [あいぼう](https://appshunter.io/ios/app/id6804939168)

All apps by TAKEHITO AWASHIMA: https://appshunter.io/developer/1886038610

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*