Eyeball Test

A test of how precisely you can measure by eye, with no tools. Three challenges: the exact center of a rectangle, the middle of a line, and a matching length. Place your mark with your finger and tap confirm to see the answer and your accuracy. Your score is the average accuracy across all three. Shapes are fixed for each board, so you and your friends can take on the same set.

How to play

1. Press where the prompt asks. Keep your finger down and slide to adjust.
2. When you're happy with it, tap confirm to see the answer (green) and your accuracy.
3. Finish all three to record your average accuracy.

Tips for a better record

• Your finger hides the mark while pressing, so let go and take another look before confirming.
• For the center, compare the distance to both edges back and forth.
• For the matching length, imagine sliding the yellow bar onto the dotted line.

Grades

• 📐 Human Ruler · 95.0% or more
• 👁️ Precision Eye · 91.0% or more
• ✂️ Handy Crafter · 86.0% or more
• 📏 Average Eyeball · 78.0% or more
• 🎈 Roughly There · Fewer than 78.0%