Comparison

书童AR互动科普 vs 知了单词书

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

About

书童AR互动科普

Features

Read full description

书童，陪你阅读，伴你成长。跟着“书童”一起探索世界！ 4D互动科普教育馆采用全球领先的曲面识别技术和跟踪技术及4D渲染技术，能够准确定位和跟踪曲面空间方位。一起到世界各地探索动物王国、植物天地、海洋世界、军事课堂、远古时代和浩瀚宇宙吧！打开4D卡就能马上看到世界各地的野生动物在你的面前出现，还有迅猛的鲨鱼、憨厚的三角龙、霸气的辽宁号、敏捷的沙滩车、威武的锯缘青蟹、神秘的天空实验室.......你知道草原上最凶猛的动物是谁吗？不是每只鹦鹉都想开口说话？走起路来摇摇摆摆的企鹅，其实是一种鸟类呢！还有，身高最高的动物---长颈鹿，居然会张开眼睛睡觉！一分钟带你游遍七大洲八大洋八大行星！带你上山入海，亲临地理气象的爆发中心，让你更直观地了解整个世界，一起来感受“书童4D科普”的奥秘与活力，还能合照分享哦！

About

知了单词书

Features

Read full description

知了单词书 - 智能单词记忆助手高效背单词，科学提升词汇量！核心功能：智能学习计划：自定义目标，AI生成复习周期，支持艾宾浩斯遗忘曲线; 全维度学习追踪：可视化数据看板、错题本自动整理、多设备云端同步; 发音辅助工具：真人英美式发音跟读、AI语音评分、离线语音查词; 沉浸式体验：无广告干扰、夜间模式、桌面快捷组件; 特色优势：碎片时间利用：5分钟快速记忆模式; 隐私政策:https://www.aplus123.cn/html?type=private 用户协议:https://www.aplus123.cn/html?type=service

Screenshots

书童AR互动科普4 screens

知了单词书3 screens

Verdict

The call

The clearest difference is in-app purchases: 书童AR互动科普 at none against 知了单词书's 1. 书童AR互动科普 also leads on iOS requirement (10.0 vs 12.0). 知了单词书's advantage is update cadence (every 5 days vs every 6 weeks). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. 知了单词书 sells 1 one-off in-app purchase. 书童AR互动科普 asks for nothing beyond the download.

UpkeepUpdate frequency

书童AR互动科普 ships an update every 6 weeks, 知了单词书 every 5 days. The most recent releases landed on September 6, 2026 and September 19, 2026 respectively.

Scorecard3 real differences · 3 level

书童AR互动科普 versus 知了单词书: the parameters behind the verdict, then further details
Parameter	书童AR互动科普	知了单词书
Price	Free	Free
Update frequency	Every 6 weeks	Every 5 days — better
Ads	No	No
In-app purchases	No — better	Yes
Devices	iPhone, iPad, iPod	iPhone, iPad, iPod
Requires iOS	10.0 — better	12.0
Further details — not scored
Size	2.7 GB	63 MB
Age rating	4+	17+
Developer	训龙何	重庆知竣文化传媒有限公司

In-app purchases

None

书童AR互动科普

No in-app purchases

1 purchases

知了单词书

One-time1

知了1年会员$39.99

Questions

Is 书童AR互动科普 free?

书童AR互动科普 is free to download, with no in-app purchases.

Is 知了单词书 free?

知了单词书 is free to download, with in-app purchases available.

Do 书童AR互动科普 or 知了单词书 have ads?

Neither 书童AR互动科普 nor 知了单词书 shows ads.

Which is updated more often, 书童AR互动科普 or 知了单词书?

书童AR互动科普 ships an update every 6 weeks, and 知了单词书 every 5 days. Most recently, 书童AR互动科普 was updated on September 6, 2026 and 知了单词书 on September 19, 2026.