Checker vs Grammarly
Checker vs Grammarly: Feature-by-Feature Comparison
Both fix grammar on iPhone. They're built on different models, though — one runs in the background, the other runs on demand. Neither one is universally better. Here's the actual comparison, feature by feature.
How each one runs
Grammarly runs continuously: install it once, and it checks nearly everything you type, everywhere, in the background. Checker runs on demand: nothing gets checked until you select text and choose an action. Same end goal, opposite defaults. Always-on catches more without asking; on-demand asks less of your data and your attention.
Comparison
| Feature | Checker | Grammarly |
|---|---|---|
| Checking mode | On demand, per action | Continuous, background |
| Setup | Enable keyboard, Full Access | Install app, enable keyboard |
| Data sent | Only text you select and submit | Text is scanned continuously as you type |
| Offline use | Keyboard works, AI actions need internet | Basic checks can run offline, AI suggestions need internet |
| Best for | Quick, occasional AI corrections | Constant grammar and style monitoring |
Frequently asked questions
Is Checker a replacement for Grammarly?
Not necessarily. Checker is on-demand and lighter; Grammarly is always-on and broader. Pick based on how much background checking you want.
Does Grammarly require Full Access too?
Yes. Any keyboard extension that reaches an online service for corrections needs Full Access, the same requirement as Checker.
Can I use both at once?
Only one third-party keyboard is active at a time on iOS, so you'd switch between them with the globe button rather than run both simultaneously.