Logic Daily: Grid Puzzles

Logic Daily (also called Logic Puzzles Daily) is an iPhone, iPad and Android app built around the logic grid puzzle, the kind found in puzzle magazines. Each problem gives a short story, several categories such as names, days and reasons, and a list of clues. You mark the grid with crosses and dots until each item in one category is paired with exactly one in every other.

It is made by Twin Wizards, a team that says it has been solving these puzzles for decades, and has been on the App Store since March 2016. The app now holds more than 4,000 puzzles, from easy to very hard, all written for it. It is still kept up: version 2.2.4 came out in September 2026, fixing the timer and the Facebook bonus pack.

The daily part is the Daily Challenge: a new logic problem appears every day for free, on top of a starter set of free puzzles. A day's puzzle can still be solved for about five days, and older months of Daily Challenges are sold as packs, beside the other paid packs and a Logic Daily Unlimited purchase that opens every puzzle. The Android version shows ads, as its Google Play listing says. A timer runs as you solve, and global leaderboards and a character called the Professor, who sets a target time for each grid, give you something to beat. Hints, an error checker, automatic crosses, multi-level undo and a notes area help on the harder grids.

It suits players who enjoy careful, pen-and-paper style deduction and want one fresh grid to solve each day, rather than quick word or number games.