Here are the best spelling and grammar check apps for multiple platforms and devices. Grammarly Keyboard is the app’s mobile keyboard extension that works with both iOS and Android devices. If you’re using Grammarly for basic grammar checking, you’ll benefit the most from the free version. However, for heavy editing, vocabulary enhancement suggestions, and genre-specific writing checks, Grammarly Premium is for you; it’s available for $29.95 a month, with lower monthly rates on quarterly and annual subscriptions.

WhiteSmoke includes a grammar, spelling, style, and punctuation checker, as well as a unique translation feature. With full-text translation to and from more than 50 different languages, WhiteSmoke makes it easy to communicate no matter your location. WhiteSmoke features three different pricing plans for one-year or three-year billing periods: Web, Premium, and Business. The Web plan costs $59.95 for a year (about $5/month) or less if you subscribe for the three year plan.

Adding the Ginger extension to Chrome or Safari is simple, and the grammar check starts immediately. You can also copy and paste your text into the companion window to get started. Ginger’s tools include a grammar checker, sentence rephraser, word prediction, and more. The app is free to use unless you wish to unlock all of its capabilities by purchasing the Premium version, which can be paid monthly, annually, or every two years with the monthly cost being $19.99 and the annual prices reducing that further when payed in full. CorrectMe is free on iOS devices. The app offers a Pro version that removes ads and unlocks more features, such as smart recommendations and grammar explanations. Speller checks the spelling of both English and Spanish words in one easy-to-use interface. Simply search for a word and Speller will tell you if it’s correct. You’ll also receive dictionary definitions from the internet as well as spelling suggestions. Speller is available for iOS devices only and is free to download and use.