The panels on this page are a shade apart. So are the sections.
You probably did not notice until it was pointed out — which is the entire subject of the app below, and a reasonable summary of how we build. A difficulty curve made of shrinking differences does not need a shop attached to it; it needs the differences to be honest and the run to end when your eyes give out, not when a timer wants money.
So Oddgrid has no adverts between rounds, no revive to buy, no hint currency and no energy. A wrong tap costs you the round and nothing else, and the next one starts immediately. There is no way to pay to see better.
Every difficulty step is generated on the device from a fixed rule, so the shade difference at round forty is the same for everybody. Nothing is tuned per player, because nothing about the player is known.
Find the Tile That Doesn't Belong
One of these tiles isn't like the others. A grid of identical squares fills the screen — except one, which is a fraction of a shade different. Tap it and the round advances: the grid gets bigger, and the difference gets smaller. Keep going as long as your eyes hold out.
It starts almost insultingly easy and turns brutal fast. By the later rounds you are squinting at a wall of tiles hunting a shade that barely exists, with the clock ticking and a wrong tap costing you. There is a timed mode where every second counts, an endless mode that runs until you slip, and a relaxed mode with no pressure at all. Your best round and high score are kept, so there is always a wall to break through next time.
Where your own threshold sits
No grid and nothing to find — two panels, and a difference you control. Widen it until the seam appears, then narrow it until it vanishes again. The number underneath is the real colour distance between the two halves, measured in CIE Lab, the same units colour scientists use.
Two panels, two sliders and nothing to tap — there is no odd tile here, no round and no score. Oddgrid is the version where the difference shrinks on its own, the grid keeps growing, and the only question is how far your eyes get.
Who publishes it
CrimsonPine Games is the app name used by AD HOC d.o.o., a company registered in Slovenia. The code, the artwork, both language versions, this website and the Google Play account are handled from one address in Oplotnica.
A round that looked impossible, colours that read oddly on your screen, or a question about privacy — the mail reaches the person who wrote the game. Pišete lahko tudi v slovenščini.
spot@adhoc.restCrimsonPine Games is a trading name of AD HOC d.o.o., registered in Slovenia at Zlogona Gora 4, 2317 Oplotnica. Oddgrid and its artwork belong to the company. The Oddgrid privacy policy applies to the Android application com.spotlab.oddgrid. Colour figures on this page describe the panels shown here; what any individual can actually see depends on the screen, the room and the eyes. Copyright 2026.