GrammarLens
Most grammar tools tell you a sentence is wrong and hand you a correction. GrammarLens builds practice around the mistakes you actually make and explains every answer in plain language. The rule's name is there only if you want it.
Version 1.0 was submitted for App Store review on 24 September 2026 and isn't approved yet. There's nothing to download yet.
Explains, not just corrects
You write or paste a sentence. GrammarLens identifies the mistake, names the rule behind it, and shows a corrected version alongside a short explanation of the difference.
Practice that adapts to your time
You choose how long a practice set should be. A short set when you have five minutes, a longer one when you don't.
Your work stays on your phone
Practice history is stored locally on your device, not on a server. Full privacy policy.
English learners who became fluent through games, series and friends, but can't reliably apply the grammar an exam like IELTS asks for: gerunds versus infinitives, modals, modal past forms. If you're starting from zero, a course will serve you better than this app.
- Process How GrammarLens was researched and built
- Support Get help or report a problem
- Privacy Privacy policy