Start a timer, make a choice, or test your response.

Pick a random A–Z letter, vowel, consonant, or custom letter. Exclude letters and see the exact pool on a matching wheel.

Count local calendar sleeps until Christmas morning, decide whether tonight counts, and print a dated bedtime checklist.

Start a 5-minute timer in one tap, add optional 1-minute and 30-second alerts, and restore accurate time after a background tab or reload.

Start a 10-minute countdown in one tap, add optional 5- and 1-minute alerts, and restore accurate time after a background tab or reload.

Start a 15-minute countdown in one tap, add optional checkpoint alerts, and recover accurate time after a background tab or reload.

Start a 20-minute countdown in one tap, add optional halfway, 5-minute, and final-minute alerts, and restore accurate time after a reload.

Flip for heads or tails, use fixed best-of-3 or best-of-5 rounds, and copy the result with your named choices and every toss.

Test five valid rounds using a keyboard, mouse, or touch. Early responses and interrupted rounds do not count toward your result.

Test Left, Right and stereo audio with short low-gain tones, an immediate Stop button, and a controlled 100 Hz–10 kHz sweep.

Measure browser-delivered FPS, median and p95 frame intervals, and delayed callbacks with a short visible-tab test and clear hardware limits.

Paste names and split them into size-balanced random groups by group count or maximum group size, then reshuffle or copy the result.

Generate family-friendly drawing words by category and difficulty, avoid repeats during the session, and run a separate 30, 60, or 90-second timer.

Combine two names into up to 12 couple, friendship, or fandom ship-name ideas using both directions, shared-letter overlaps, and adjustable cuts.