TrainTT vs U
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TrainTT
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1.安全加密： 使用端到端全方位算法保障于安全防范。 2.简介体验：专注即时通讯，提供稳定的核心基础功能。 3.保护隐私:云端不保存聊天记录，可关闭已读回执，同时提供阅后即焚和销毁账号等保护用户隐私。 4.聊天: 提供文本，语音，图片，视频，文件，表情等聊天方式。
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/
Screenshots
Verdict
The clearest difference is in-app purchases: TrainTT at none against U's 3. TrainTT also leads on ads (none vs shown) and update cadence (every 3 days vs weekly). On price, device support and iOS requirement 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. TrainTT asks for nothing beyond the download.
TrainTT ships an update every 3 days, U weekly. The most recent releases landed on September 14, 2026 and September 9, 2026 respectively.
| Parameter | TrainTT | U |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 days — better | Weekly |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 49 MB | 94 MB |
| Age rating | 17+ | 12+ |
| Developer | Qian Yun Network Service Co., Ltd. | HAIK |
In-app purchases
TrainTT
No 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
