Rainbet

Rainbet is a compact, one-thumb cryptarithm — verbal arithmetic. Each letter in the sum stands for a single digit, the same letter always the same digit, and different letters different digits Your job is to assign digits so the addition A + B = C comes out true, with no number allowed to start with a zero. Duplicate digits and illegal leading zeros light up so you can course-correct. Pick a letter, tap a digit, and watch the running sum at the bottom. Every one of the 20 levels is generated to have exactly one valid solution, so logic always gets you there. Rainbet plays fully offline. No accounts, no network, no forced ads, nothing to buy. Features: - Cryptarithm logic across 20 rising levels - Every puzzle has exactly one solution - Duplicate and leading-zero highlighting - One-thumb play: pick a letter, tap a digit - No forced ads, no pay-to-win - Plays fully offline — no accounts, no network