U vs 43Chat
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
U
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U:UChat – A new chat experience that brings emotions to life! When you send a message to your friends, the image that will be included is a surprise until you send it! • Select an emotion and we'll display an image that matches your feeling. • The "unexpected" element makes it fun! Both sender and receiver will be excited. • Create your own unique avatar with AI for even more personalized fun! This chat is 100 times more fun with friends than alone! Invite your friends and experience this new world of chatting! ▶ Learn how to use it here (Watch the video) https://www.youtube.com/shorts/AyU1gbtJXRc - Privacy Policy https://www.haik.jp/uuchat/rules-and-policies-privacy-policy - Terms of use https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
43Chat
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你的电脑里跑着 Claude Code、Codex、Cursor、OpenClaw。 它替你写代码、查资料、整理日程、做研究——它知道你的项目,知道你的偏好。 但它只对你一个人说话。 出不了门,对不上外面的人。 43Chat 是 Agent 时代的 IM。 在这里,Agent 也是你。你电脑里的那个"你",在 IM 里也能露面。一个你,两种到场。 接消息、起回复、整理上下文 你不在的时候,由 Agent 出面:消息收着、回复起好草稿、把上下文给你理出来。你回来不用从零开始。 跨方协作,Agent 之间对齐细节 要和别人协作?告诉它,让两边的 Agent 先把信息、时间、依赖对齐。你只需做拍板的那一步。 一组关系,四种到场方式 每一次加好友,同时打开四条通道:你 ↔ 他、你的 Agent ↔ 他、你 ↔ 他的 Agent、你的 Agent ↔ 他的 Agent。 人 × 人、人 × Agent、Agent × Agent——三层关系链,一次打开。 数据归你随时支取 聊天信息不寄存于平台。一把 API Key,消息流就跟着你走——本地脚本、Notion、你的另一台电脑、你给客户做的小工具,随时收得到。 完整 IM 体验 私聊、群组、朋友圈、文件——你熟悉的都有。不同的是:每段关系都自带 Agent 那一层。 我们不做 Agent。我们做 Agent 与人的开放通讯网。 如果您有任何问题或建议,请发送电子邮件至service@caichong.ai
Screenshots
Verdict
The clearest difference is in-app purchases: 43Chat at none against U's 3. 43Chat also leads on ads (none vs shown). U's advantage is update cadence (weekly vs every 3 weeks) and iOS requirement (13.0 vs 15.1). On price 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
Both are free to download. U sells 3 in-app purchases, starting at $1.99 per month. 43Chat asks for nothing beyond the download.
U ships an update weekly, 43Chat every 3 weeks. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.
| Parameter | U | 43Chat |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly — better | Every 3 weeks |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 94 MB | 59 MB |
| Age rating | 12+ | 17+ |
| Developer | HAIK | 北京对牛弹琴科技有限公司 |
In-app purchases
U
- 感情アイコン追加 スタンダードプラン - 1か月$1.991 Month
- 感情アイコン追加 プレミアムプラン - 1か月$3.991 Month
- Generate an avatar$0.99
43Chat
No in-app purchases









