Approximatr uses your built-in ability to gauge sizes, distances, alignments, angles etc to see how good your eyes are!
I've been building this for a few months, and it's been fun discovering what types of puzzles humans are good at, and terrible at - for example we're pretty good at finding the middle of something, and terrible at comparing geometric areas. It's remarkable sometimes how I'll prototype a new puzzle, and find it absolutely impossible to achieve a good result reliably even with practice, or find I'll be able to get bang-on 100% of the time - discovering the balance between the two has been quite a journey.
Comments URL: https://news.ycombinator.com/item?id=50087464
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