| 有免費方案 | YES |
|---|---|
| 免費試用詳情 | |
| 定價模式 | Freemium |
| 是否需要信用卡 | No |
| 付款起點 | |
| 有終身方案 | No |
| 計費頻率 |


| 關鍵詞 | 流量 | 每次點擊成本 |
|---|---|---|
| duolingo bangla | 470 | $ 3.56 |
| how hard is it to learn thai | 440 | $ 4.79 |
| how long does it take to learn danish | 340 | $ -- |
| is thai a hard language to learn | 280 | $ -- |
| how hard is bangla to leran | 220 | $ -- |