The Futoshiki +4

If you are looking for Futoshiki puzzles, with a full range from easy to the ridiculous 9x9 monsters, then this app is terrific! It does not try to do anything more - there aren’t any sudoku, kakuro, or any other types of puzzles- so if you are looking for anything other than Futoshiki puzzles then this is not for you.

Here’s what I like about this app:
• Those 9x9 puzzles are so challenging that they take me an hour to finish
• It is very easy and intuitive to make notes of the possible values for each square. As the puzzles get more challenging, then those notes are essential
• The app will automatically warn you if happen to enter the same integer twice in any row or column.
• The app simply works. I have yet to encounter any bugs.
• It’s free, without any in-app purchases or mandatory commercials! Banner ads across the top are a small price to pay for a quality app.

I hope the developers add more puzzles in the future!

I love how large the database of puzzles is—that’s an amazing feature. Some bugs: the level chooser screen is very, very laggy on iOS, and the puzzles a little laggy. The size chooser screen is largely fine. The level chooser screen also doesn’t preserve which levels you’ve completed between times the app is closed for any length of time. This is a bit frustrating, as you have to remember where you were and scroll (slowly because of lag) down to select by memory. Also, not a bug, but I’ll echo another user’s review saying that the modes to mark a number and to mark possible numbers are a little confusing. If you’re switching back and forth between using those two strategies, it’s a bit of mental gymnastics to remember to select everything but the number you want from the potentials but select the number you want for a blank square. It just ends up taking longer and is a bit annoying. I’m sure that goes away with time, but it could be smoother to start. Otherwise, great puzzles, and love the game!

I am enjoying this game. I like the choice of levels, and you can move from level to level whenever you feel like having a harder or easier game. I thought the larger games would be really difficult, but once you catch on, they are not. Others have mentioned that the game does not keep track of their progress, but I haven’t experienced that.