Comparison

什么? vs 知己

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

Head to head
About

什么?

This app offers a minimalist card-based interface for exploring knowledge. It uses AI to generate personalized content based on your interactions, allowing for seamless follow-up questions and a unique learning journey.

Highlights
  • Minimalist card interface
  • Personalized AI content generation
  • Swipe to switch topics
  • Highlight text for AI follow-up questions
  • Frictionless exploration
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【极简卡片流】内容以极简卡片形式展现,左右滑动即可切换主题,界面清爽专注,探索更纯粹。 【专属内容生成】根据你的行为、偏好和每一次划取、滑动,实时为你生成独一无二的文章和图文,让每一次探索都贴合你的真实好奇。 【无摩擦探索】首创“划取追问”,在阅读时只需划取文字,AI即为你延展解答,无需中断,无需跳转,思维自然延伸。 在“什么?”,你永远是探索的主角。AI,是你的隐形助手,为每一次提问和思考提供即时、精准的内容支持。告别信息茧房,让好奇心得到最大释放,开启专属于你的内容世界!体验全新知识探索之旅! 【找我们玩】 小红书: @什么APP-唯识无境

About

知己

Features
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知己是住在你手机里的 AI 私人管家。它记得你说过的事,在对的时间提醒你,也能在你点头后替你动手。 它记得 · 聊天里随口提到的偏好、过敏、家人喜好,自动整理成记忆 · 拍一张证件,识别号码和有效期,放进档案库 · 记账、心情、体重、目标进度,一处查看 它了解你(可选,默认关闭) · 连接 Apple 健康(HealthKit):只读取步数、睡眠、运动、心率、体重、血压、血糖,每天汇总一条 · 读取日历,回答和提醒时结合你接下来几天的安排 · 导入支付宝、微信、银行账单,预览后一键记账 它动手 · “下周三下午三点提醒我去体检”——直接设好提醒 · 写日历、定闹钟、起草短信、联网查资料 · 凡是会改动手机的操作都会先问你,点“允许”才执行 它提前想到 · 每天早上一份简报,列出今天值得留意的事 · 房贷车贷、信用卡账单、借给朋友的钱,按时提醒还款与收款 · 证件、保单按到期前 180 / 90 / 30 / 7 天阶梯提醒 · 生日、预算、目标逾期都会提前告诉你 你的资料只属于你 · 所有资料只保存在本机,不需要注册账号 · 首次使用 AI 前征得你的同意,随时可撤回 · 健康数据不用于广告,只把汇总作为对话上下文发给你选择的模型服务 · 没有广告,不接入第三方统计和追踪;只有一项可在设置中关闭的匿名使用计数 使用说明:知己通过你选择的大模型服务工作(火山方舟、DeepSeek、Kimi(月之暗面)、智谱、通义千问、OpenAI、Gemini……以及其他兼容 OpenAI 接口的服务),需要填写你自己在该服务的 API Key。知己不是医疗器械,健康相关内容仅供参考。

Screenshots

什么?4 screens
知己4 screens

Verdict

The call

The clearest difference is ads: 知己 at none against 什么?'s shown. 知己 also leads on update cadence (every 3 days vs fortnightly). 什么?'s advantage is iOS requirement (17.0 vs 26.0). On price, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

什么? ships an update fortnightly, 知己 every 3 days. Both last shipped on October 19, 2026.

Scorecard3 real differences · 6 level
什么? versus 知己: the parameters behind the verdict, then further details
Parameter什么?知己
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyFortnightlyEvery 3 days — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supported—
DevicesiPhoneiPhone
Requires iOS17.0 — better26.0
Further details — not scored
Size8 MB8 MB
Age rating12+12+
Developer唯识无境科技(深圳)有限责任公司/Weishi Wujing Technology (shenzhen) Co., Ltd伟烈 熊

In-app purchases

None

什么?

No in-app purchases

None

知己

No in-app purchases

Questions

Is 什么? free?
什么? is free to download, with no in-app purchases.
Is 知己 free?
知己 is free to download, with no in-app purchases.
Do 什么? or 知己 have ads?
什么? shows ads; 知己 does not.
Which is updated more often, 什么? or 知己?
什么? ships an update fortnightly, and 知己 every 3 days. Most recently, 什么? was updated on October 19, 2026 and 知己 on October 19, 2026.

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