A Education app. Over the last 4 days it ranged $24.99–$24.99. That is above its 4-day average — worth waiting.

A Education app. Over the last 4 days it ranged $8.99–$8.99. That is above its 4-day average — worth waiting.

A Education app. Over the last 4 days it ranged $4.99–$4.99. That is above its 4-day average — worth waiting.

A Education app. Over the last 4 days it ranged $5.99–$5.99. That is above its 4-day average — worth waiting.

A Education app. Over the last 4 days it ranged $1.99–$1.99. That is above its 4-day average — worth waiting.

A Education app. Over the last 4 days it ranged $2.99–$2.99. That is above its 4-day average — worth waiting.

A Education app. Over the last 4 days it ranged $1.99–$1.99. That is above its 4-day average — worth waiting.

A Education app. Over the last 4 days it ranged $6.99–$6.99. That is above its 4-day average — worth waiting.

A Education app. Over the last 4 days it ranged $4.99–$4.99. That is above its 4-day average — worth waiting.

A Education app. Over the last 4 days it ranged $9.99–$9.99. That is above its 4-day average — worth waiting.

A Education app. Over the last 4 days it ranged $4.99–$4.99. That is above its 4-day average — worth waiting.

A Education app. Over the last 4 days it ranged $5.99–$5.99. That is above its 4-day average — worth waiting.

A Education app. Over the last 4 days it ranged $0.99–$0.99. That is above its 4-day average — worth waiting.

A Education app. Over the last 4 days it ranged $14.99–$14.99. That is above its 4-day average — worth waiting.

A Education app. Over the last 4 days it ranged $5.99–$5.99. That is above its 4-day average — worth waiting.

A Education app. Over the last 4 days it ranged $3.99–$3.99. That is above its 4-day average — worth waiting.

A Education app. Over the last 4 days it ranged $5.99–$5.99. That is above its 4-day average — worth waiting.

A Education app. Over the last 4 days it ranged $4.99–$4.99. That is above its 4-day average — worth waiting.

A Education app. Over the last 4 days it ranged $33.99–$33.99. That is above its 4-day average — worth waiting.

A Education app. The download is free now, but the main features are sold through in-app purchases (it used to cost 免费 to download).

A Education app, normally 免费, now free.