Puzzle IO - Binary Sudoku

Warning: ad-free breaks hints!

I really enjoy this, it’s simple and straightforward and it’s an entertaining puzzle. And I really appreciate the ad-free option so you don’t have to constantly watch ads. But one warning: if you buy ad-free, it breaks the “watch ads to get a hint” buttons, so you can no longer earn extra hints. I tried emailing the devs about this months ago and they never responded to me.

Great Puzzles w/ good mix of challenging & brainless

I have played this daily since finding it a few weeks back. I even splurged for the ads-free version (reasonable one-time fee). The gameplay is deceptively simple to learn and enjoyable for logic and puzzle game aficionados. My only complaint is a glitchy interface combined with an automated “error-check” that utterly fails at distinguishing between genuine user error and said glitchy interface. Simply explained, there are only three options for each cell: circle, X & blank. One tap is circle; two taps, X; & three taps is back to blank. Often there is a lag after a tap. Unsure if it didn’t detect it or if it’s just lagging. I frequently tap four to eight times to get my choice. Slightly clunky, but not gratingly so. Unfortunately it’s straight up problematic if I’m working on the last empty cell in a row or column. Regularly the wrong option is easily read as an error. (By this I mean, the line is checked before my final tap.) One error equals the loss of the three lives allocated for each game. I’ve adapted by forcing myself to slow down and focus when working on the last empty cell. Though this reduced my official game errors, I’d prefer to either be asked if the line just completed is ready to be checked or simply to have a separate way to submit it once my choice is correctly displayed. I also stop playing the game each day the first time I’m prompted to earn new lives because of interface errors instead of my actual mistakes. Again, the actual game design is visually attractive and fun to play.