This Japanese-language review article explains how much of the English learning app Epop can be used for free, covering the limited free version (about 25 vocabulary questions before an upgrade prompt) and the 7-day free trial that unlocks all paid features. It also covers trial features such as vocabulary study, notes on trial cautions, a comparison with other apps' trials, and paid plans, so readers land on it while deciding whether to try or pay for Epop.
Japanese adult English learners (TOEIC, travel, and everyday conversation goals) who are considering Epop and want to know the free limits before committing.
A mention would suit competing or complementary English learning products, such as other study apps, online English conversation schools, or TOEIC prep services, especially those with their own free trial. It would read most naturally in the section comparing free trials of other English apps, or near the end where readers weigh paid plans and alternatives; note the page is affiliate-driven and focused on one specific app, so unrelated brands would fit poorly.
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