GRAVASS, INC.
This is a game where you challenge yourself to see how many times in a row you can guess the correct answer with a probability of 1/2.
Items currently visible on Apple’s public App Store page. This may not be the complete App Store Connect catalog.
Source: Apple public App Store page · Publicly visible items only · Checked Aug 7, 2026
This is a game where you challenge yourself to see how many times in a row you can guess the correct answer with a probability of 1/2.
Please choose one from the two options "L" and "R".
If you answer correctly, the probability of consecutive correct answers at that point will be displayed.
You can redo your selection only once during a series of correct answers.
*If you try again, the correct answer choices will be drawn again.
We plan to continue updating and adding features in the future.
Quick answers based on the latest observed App Store data.
The latest observed download price is Free. Open the official App Store link to confirm the current checkout price.
Apple's public page currently shows 0 purchase items in this storefront. The public list may be incomplete.