Based on our record, Listudy seems to be more popular. It has been mentiond 5 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Https://listudy.org/en does it with spaced repetition. You could import your own study or use a premade one off lichess. Source: 6 months ago
You can browse the various e4 repertoires here https://listudy.org/en. If you're a beginner, you can learn the repertoire by Gotham Chess. Source: about 1 year ago
I have enjoyed using LiStudy https://listudy.org/en. Source: about 1 year ago
An idea: on https://listudy.org/en play "Blind Tactics" - slowly work your way up to higher plies number. (personally, I prefer even number of plies for whatever reason). Source: over 1 year ago
As one can solve puzzles, one may also enjoy exploring opening moves (in short playing a sort of memory game via openings, with the bonus of understanding why a specific opening is played and which structures it brings). Chessable (there is a specific free course that fits well) or https://listudy.org/en or https://www.chessfactor.com/ are great for it. Source: over 2 years ago
String of Words - String of Words is an app by Nickel Buddy LLC that comes up with features to help users in creating a chain of words so they can solve puzzles to boost up their skills.
Chess.com - Play chess on Chess.
Crossword Puzzle Free - Crossword Puzzle Free is an app by Redstone Games that provides you with a variety of different puzzles according to various difficulty levels such as easy, medium, hard, and pro, etc.
Lichess - The complete chess experience, play and compete in tournaments with friends others around the world.
Giant Jumble Crosswords - Giant Jumble Crosswords is an app by Adveractive Inc.
Chessable - Chessable uses science-based training techniques to improve how you learn content from chess books and videos.