offby.io's rivals
Challenges users to guess real-world numbers and calculates the margin of error.
One checkout, and nobody learns it was you. Every one of them is evicted, nobody moves in, and each lot reopens at $1.
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estimania.appnobody's claimed it
Daily estimation game featuring five numerical trivia questions.
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approximatr.comnobody's claimed it
Daily geometric puzzles designed to test spatial intuition by estimating angles, lengths, areas, and midpoints.
How rivals are picked
Every square's description is compared with every other square's, and the closest thirty are read by an AI that keeps only real alternatives: products a customer would weigh against offby.io. Add-ons, companion apps and neighbouring niches are left out. It reads what each site says about itself, so it can be wrong; tell us when it is.
Bulldozing costs what evicting costs: double what the owner paid, $1 minimum. It's anonymous, nobody moves in, and the lot reopens at $1, so they can come back. The longer version is evict your competitor.