The original demo runs in the browser. No app or APK is supplied or verified. No installation, sideloading, account or security-bypass procedure is established.
APK and Installation Facts
No official APK package has been reviewed or linked from this guide. The absence of an installation file in this demo does not prove that no external package exists, nor does it certify the security or origin of any third-party APK.
Users seeking to install an APK should verify the source independently. This demo operates entirely within the browser environment and does not require sideloading or specific operating system permissions to run.
Browser Demo Mechanics
The game Idempotent Stamp runs as a browser simulation. The mathematical rules are fixed and do not depend on a server-side app state.
- Core Rule: Nine fair bits form a 3 by 3 matrix A. Reward is one when A squared equals A over GF(2), otherwise zero; the zero matrix is included.
- Modes: The raw reward is raised to power 1, 2, or 3. Each mode is separately normalized by its exact mean over all equally likely complete draws.
- Return: This normalization gives a 96% expected gross return in each mode.
- Controls: Stake buttons are 10, 20, 50 and 100. One whole stake is captured per board. There is no Auto, Stop or cash-out.
Wallet and Persistence
The demo wallet is local to this browser session.
- Initial Balance: 1000 virtual coins.
- Restoration: An idle balance below 10 can be restored manually to 1,000. This is a manual set, not an automatic replenishment.
- Fractional Carry: Fractional payout change persists through settlement, manual refill and reload.
- Unfinished Rounds: An unfinished draw is not refunded on reload. The round ends without resume capability.
Mathematical Evidence
Simulation measurements are supporting sample observations, not the mathematical payout law. The exact expected value is distinct from measured estimates.
| Mode (Power) | Expected RTP | Measured RTP | Final Carry |
|---|---|---|---|
| 1 | 96.00000000000006% | 96.0345335174488% | 0.7034482755955196 |
| 2 | 96.00000000000006% | 95.9862289657244% | 0.7931034480094468 |
| 3 | 96.00000000000006% | 95.64470731055003% | 0.462068965251774 |
Privacy and Storage
This demo uses localStorage for settled balance and fractional carry. This does not establish anonymity or exclude other processing by the browser or network.
The template declares a Google Fonts stylesheet; actual full-site network capture remains pending. The absence of account or payment controls in the demo does not prove that no personal data are processed.
Responsible Use
18+ is this guide's own intended audience; it is not a universal legal age, an implemented age gate, or a statement of local legality.
You can take breaks between draws, follow voluntary time or coin limits, and seek qualified local help. The demo does not make losses safe or provide clinical training.
Frequently asked questions
Is there a downloadable APK for qq7887?
No. The original demo runs in the browser. No app or APK is supplied or verified by this guide. No installation, sideloading, account or security-bypass procedure is established.
How does the wallet restoration work?
An idle balance below 10 can be restored manually to 1,000. This sets the balance to exactly 1000. It does not add coins or automatically replenish; it is a manual idle-only restoration.
What happens if I reload the page during a game?
An unfinished round ends without refund or resume. The settled balance persists, but the current draw is lost.
