About this app
English grammar exercise question bank, including learning materials, in-app purchase after unlocking more than 1500, specific error this function, you can collect the usual learning process encountered errors or classic problems and so on. Suitable for all levels of students to use.
Latest release
What’s New
This update: Fixes known errors.
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Sep 12, 2026 · 4:57 AM Free
Screenshots
