Probability Challenge

Probability Challenge
Developer: Calista Reiko
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⚠ This app was removed from the US App Store and is no longer live.

Probability Challenge Summary

Probability Challenge is a free iOS app in Games by Calista Reiko. Released in Jul 2026 (recently released ago). Store last updated Jul 5, 2026

Probability Challenge SDKs Summary

App not yet scanned for SDKs.


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App Description

Probability Challenge
About the Game

Probability Challenge is a fun and addictive puzzle game that combines probability, strategy, and a little bit of luck. Every decision matters as you predict whether the next hidden number will be Higher or Lower than the current one.

Don't rely on luck alone. Before every turn, the game reveals the real probability of each option based on the remaining numbers. Will you play it safe by choosing the more likely outcome, or take a calculated risk for a greater reward? Every choice could bring you closer to a new high score... or end your run instantly.

Gameplay

Each level consists of 10 prediction rounds.

The first level uses numbers from 1 to 10.
As you progress, the range expands to 1–20, 1–30, 1–40, and beyond, making every prediction more challenging.
Every number appears only once during a level.

After the first number is revealed, predict whether the next number will be:

Higher
Lower

Before you choose, the game displays the actual probability of each option based on the numbers that haven't appeared yet.

Risk vs. Reward

Every decision is a balance between safety and risk.

Choose the Higher Probability Option

Correct: +1 Star
Wrong: −3 Stars

Choose the Lower Probability Option

Correct: +3 Stars
Wrong: −1 Star

Every Star is worth 10 Score points.

However, if your Stars reach 0, the game ends immediately.

Increasing Challenge

As you complete levels, the range of possible numbers becomes larger, making probability calculations more difficult and every decision more meaningful.

Will you:

Play safely to protect your Stars?
Or take calculated risks to earn bigger rewards?

There is no perfect strategy. Success comes from combining logical thinking, smart decision-making, and a little luck.

Features
Easy to learn, challenging to master.
Real-time probability calculation every turn.
Unique risk-versus-reward gameplay.
Improve your logical thinking and decision-making skills.
Cute, colorful visuals with relaxing gameplay.
Compete for the highest score and climb the leaderboard.

Can you beat the odds, make the smartest choices, and become the ultimate Probability Challenge