# Sherlock ZEN > Logic puzzle game deducing image locations on a grid using clues. (iPhone/iPad app by Everett Kaser Software.) - Source: https://appshunter.io/ios/app/sherlock-zen/id979645848 (this page in markdown: same URL + `.md`) - Developer: [Everett Kaser Software](https://appshunter.io/developer/383644089) - Category: Games, Education, Puzzle - Price: $5.99 - Rating: 4.10/5 from 48 App Store ratings · 34 written reviews indexed - Age rating: 4+ - Requires: iOS 8.0 · 15 MB - Languages: American English - Released: 2015-04-04 - Data updated: 2026-08-26 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/sherlock-zen/id979645848/reviews.md ## What is Sherlock ZEN? Sherlock is a computerized version of logic puzzles, where you're presented with a series of clues that help you determine the exact locations of all the images on the playing board. The puzzles are all 4x4, 5x5 or 6x6. Each row of the puzzle contains images of the same type (faces, houses, numbers, fruit, street signs, letters, etc). The game scrambles the locations of the items in each row (without showing you their locations) and then presents to you a set of graphical clues that describe the positional relationships of different images. You use the clues to deduce where things can't be (and where they HAVE to be) until you know where all of the images are located. 50,000 puzzles in each size for a total of 150,000 puzzles! The puzzles in the Free, Pro, Ultra, and Zen versions of the game are all unique, the four versions of the game share NO common puzzles. ## Key features - Logic grid puzzles - Deduce image locations - Graphical clues - Multiple grid sizes (4x4, 5x5, 6x6) - 150,000 unique puzzles ## Recent user reviews (10 of 34) All indexed reviews: https://appshunter.io/ios/app/sherlock-zen/id979645848/reviews.md ### 3/5 — New Problem with IOS version *2026-07-14, version 1.5.1* I love Sherlock, and have played it for years. Recently, due to some change on either the iPad IOS or Sherlock, the game does not appear to fit appropriately on my iPad. Most unfortunately, the min/max/close buttons block the upper left tilde - meaning you have no way to update that square. Please fix! ### 5/5 — Le meilleur *2025-05-29, version 1.5.1* Ça fait plus de 30 ans que je joue à Sherlock tous les jours c’est le meilleur moyen de se maintenir active, il y a une dizaine d’années après un accident m’ont fait un IRM au cerveau et le neurochirurgien m’a demandé qu’est ce que je faisait pour avoir un cerveau si jeune, il a dit que à mon âge (60 ans a l’époque) le normal c’était d’avoir une couche blanchâtre tout au tour mais je n’avais rien et ma seule réponse c’était que je jouais au Sherlock tous les jours :) ### 5/5 — Fantastic *2025-04-19, version 1.5.1* Fantastic game that keeps things moving in the brain area! Well crafted game that keeps giving! ### 5/5 — Best Einstein Puzzle generator of them all. *2024-11-16, version 1.5.1* I have played this game since it first came out in the DOS days.. I have had to reinstall it several times because it quits on its own. Everett Kaser is a wack-a-doo anti-Trumper and has no intention of fixing the app to stop crashing. ### 4/5 — Loved this as a child *2024-06-08, version 1.5.1* I discovered this game as a kid and really loved it. On a whim I tried to search for it and was surprised to find it here in all its 80’s glory. Paying for this because it made such an impression on me and still remains a unique and interesting game. ### 5/5 — Addictive! *2024-05-10* I've played this game at least twenty years through multiple platforms. It's great for intricacy; really keeps my brain focused. I also find it oddly soothing. When I'm mildly agitated this game makes it go away. I'd love it if there were more Everett Kaiser games available for iPad. I've played and enjoyed many of them over the years, but Sherlock was always my favorite! ### 1/5 — Fix the dang game. *2024-02-25, version 1.5.1* For a paid game to just stop working after about 1/100th of the puzzles completed is a joke. I should be asking for a refund. ### 5/5 — Best Einstein Puzzle generator of them all. *2023-12-12* I have played this game since it first came out in the DOS days. In its IOS form it is the best game for solving the so called Einstein Puzzle. This app also doesn’thave ads. ### 5/5 — Great for mental agility *2023-05-13, version 1.5.1* Like so many others, I’ve played this game for DECADES. My first purchase was in the early 90’s. I still have the original floppy disc. This is a fun game. It helps keep me mentally sharp. And it gives me a good break from a very mentally demanding job. ### 5/5 — Love this game *2022-10-15, version 1.5.1* I have ultra on my iPad mini and both are great fun! ## Frequently asked questions about Sherlock ZEN ### What is Sherlock ZEN? Sherlock ZEN is a digital logic puzzle game. Players are given a set of clues to deduce the exact positions of images on a playing board, which can be 4x4, 5x5, or 6x6 in size. The goal is to use the clues to determine where each image must be located. ### How does the gameplay work? Each row of the puzzle contains images of the same type, like faces or numbers. The game scrambles their locations and provides graphical clues about their positional relationships. You use these clues to eliminate possibilities and logically determine the correct placement of all items. ### Is this game free to play? Yes, the Sherlock ZEN version of the game is free to play. The description mentions that puzzles are unique across different versions (Free, Pro, Ultra, Zen), indicating that the Free version offers a substantial puzzle experience without cost. ### What makes the puzzles unique? The game boasts a large collection of unique puzzles, with 50,000 puzzles available for each of the three grid sizes (4x4, 5x5, and 6x6), totaling 150,000 puzzles. Crucially, the puzzles in the Free, Pro, Ultra, and Zen versions are all distinct and do not overlap. ### What are the different grid sizes available? The puzzles in Sherlock ZEN are available in three different grid sizes: 4x4, 5x5, and 6x6. Each size offers a unique challenge and a large set of distinct puzzles to solve. ## Version history (last 3 releases) ### 1.5.1 — 2017-06-12 This update from Apple will improve the functionality of this app. No new features are included. Supports 64-bit iOS ### 1.4.3 — 2015-04-09 Fixes bug that caused images to not be resized smoothly on some devices. ### 1.4.0 — 2015-04-03 No release notes. ## Apps similar to Sherlock ZEN | App | Rating | Price | Category | | --- | --- | --- | --- | | [Calcudoku · Sudoku-like Puzzle](https://appshunter.io/ios/app/calcudoku-sudoku-like-puzzle/id1195710578) | 4.7 (1,524) | Free | Games | | [LogiBrain Binary](https://appshunter.io/ios/app/logibrain-binary/id1136183233) | 4.8 (67) | Free | Games | | [LogiBrain Tents and Trees](https://appshunter.io/ios/app/logibrain-tents-and-trees/id1506363379) | 4.4 (10) | Free | Games | | [The Futoshiki](https://appshunter.io/ios/app/the-futoshiki/id1398126397) | 4.7 (792) | Free | Games | | [Hashi: Bridges](https://appshunter.io/ios/app/hashi-bridges/id567583852) | 4.9 (1,017) | Free | Games | | [Suguru](https://appshunter.io/ios/app/suguru/id1441239692) | 4.8 (297) | Free | Games | ## More apps by Everett Kaser Software - [Honeycomb Hotel ULTRA](https://appshunter.io/ios/app/honeycomb-hotel-ultra/id615577608) - [Sherlock ULTRA](https://appshunter.io/ios/app/sherlock-ultra/id616119868) - [Honeycomb Hotel PRO](https://appshunter.io/ios/app/honeycomb-hotel-pro/id620449569) - [Sherlock PRO](https://appshunter.io/ios/app/sherlock-pro/id626273932) - [Sherlock FREE](https://appshunter.io/ios/app/sherlock-free/id631434866) - [Willa's Walk FREE](https://appshunter.io/ios/app/willas-walk-free/id714422285) All apps by Everett Kaser Software: https://appshunter.io/developer/383644089 ## Related topics [everett kaser software](https://appshunter.io/ios/topics/everett-kaser-software) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-26.*