Under Development

Silver-Iodide Games is actively under development.

We are improving current games and adding new ones every week. You are welcome to enjoy all games for free while we build.

Gym Apps

Core cognitive drills for attention, memory, logic, and estimation.
01 // ATTENTION BLINK

Attention Blink

Spot two targets in a rapid stream of flashing items.
02 // FOCUS GRID

Focus Grid

Memorize a lit pattern, then recall it perfectly.
03 // DUAL N-BACK

Dual N-Back

Match position and letter from N steps ago.
04 // VIGILANCE

Sustained Vigilance

Watch for rare targets in a long stream of distractors.
07 // MENTAL MAP NAVIGATION

Mental Map Navigation

Track directional sequences on a hidden grid, then report your location and heading to start.

08 // LOGIC GATES LIVE

Logic Gates Live

Evaluate chained AND, OR, NOT, and XOR circuits from live input bits.
09 // ARITHMETIC TETRIS

Arithmetic Tetris

Drop number blocks and clear adjacent pairs that sum to the target before overflow.

11 // WORD MEMORY RECOGNITION

Word Memory Recognition

Judge each word as seen-before or new while balancing speed and accuracy across a mixed memory stream.

12 // STROOP SHIFT

Stroop Shift

Name the correct color under interference with selectable twists: rule pulses, memory echoes, emotion spikes, or mixed mode.

18 // MAZE ROUTING

Maze Routing

Predict the correct boundary exit from a given entry in a classic branching maze where only one route connects.

Trainers

Skill-focused symbol systems and encoding practice.
13 // MORSE CODE TRAINER

Morse Code Trainer

Practice decoding and encoding Morse signals with timed rounds and keyboard controls.

14 // BRAILLE TRAINER

Braille Trainer

Train both directions with Grade 1 braille: decode cells into letters and encode letters back into dot patterns.

Word Games

Lexical search, semantic reasoning, and language pressure loops.
15 // WORD FORGE

Word Forge

Build as many valid words as possible from a generated 6-12 letter set and score by word length.

16 // WORD TETRIS

Word Tetris

Drop weighted letter blocks and clear horizontal or vertical dictionary words in any reading direction.

17 // SEMANTIC RANK

Semantic Rank

Find the hidden word by semantic closeness, with each guess ranked against the full dictionary.

Under Construction

These games are being improved and actively expanded.
UC-01 // CONSTRAINT BUILDER

Constraint Builder

Complete 4x4 logic grids with row and column constraints under time pressure.

UC-02 // ESTIMATION LAB

Estimation Lab

Cycle through quantity, timing, and length estimation with calibrated feedback.

UC-03 // FERMI ESTIMATION

Fermi Estimation

Run timed estimation rounds from the imported Fermi seed bank, with unit-tagged answers and confidence tracking.

UC-04 // CONTEXTUAL SYNONYMS

Contextual Synonyms

Replace a highlighted word with context-matching synonyms and inspect four separate semantic closeness metrics for every guess.

UC-05 // PATTERN BREEDER

Pattern Breeder

Explore evolving visual patterns: keep the designs you like, then breed the next generation with crossover and mutation.