相対性理論計
時間のずれを見る万歩計のおもちゃ
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
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) from special relativity (speed), and Δt ≈ t·gh/c² from general relativity — gravitational redshift (height). 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.)
Optional dial-face pack
The digital dial stays free. SF and cosmic dials include a 7-day on-device trial, then unlock with one non-consumable purchase (not a subscription).
Made by Lagado Lab.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Major update: new SF & cosmic home dial faces. Digital stays free; try all dials for 7 days on-device, then unlock SF & cosmic with one non-consumable purchase. Apple Watch keeps live numbers and dial graphs moving while measuring even with iPhone in a pocket; pulse-only at home and graphs move when you go outside; twin-play polish. Also steadier height readouts after you return home, and smoother landing when you change dial faces.
The developer, TAKEHITO AWASHIMA, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- TAKEHITO AWASHIMA
- Size
- 8.4 MB
- Category
- Education
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later. - Apple Watch
Requires watchOS 10.0 or later.
- iPhone
- Location
- This app may use your location even when it isn’t open, which can decrease device battery life.
- Languages
- Japanese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- SF & Cosmic Dial Faces $1.99
- Copyright
- © 2026 ラガード研究所
