
UnderLine - Live Typing Chat
Ad-Free Messaging with Friends
0 ratings
Free
Rating summary
About
UnderLine is a one-to-one messaging app that lets your conversation partner see your words in real time while you type.
Unlike conventional messaging apps, where the other person sees your words only after you tap Send, UnderLine lets the conversation begin from the moment you start typing. When you delete draft text, the change is also reflected on the other person's screen. This makes it possible to share the rhythm of a conversation and the way words take shape, even when you are apart.
Key features
- Real-time display of text while it is being typed
- Simple one-to-one messaging
- Photos that disappear 24 hours after they are sent
- Reply to a message and react with emoji
- Share text, links and photos into UnderLine from other apps
- Add friends using public IDs or QR codes
- See in your conversation list when someone is typing
- Search your contacts, and your conversation list by name or message
- Mute notifications, pin conversations, or hide them from your list
- Push notifications for new messages
- Blocking, reporting, and in-app account deletion
- Available in Japanese, English, Spanish, Portuguese, Korean, French, German, Indonesian and Traditional Chinese
Message bodies and live-typing text are end-to-end encrypted. Push notifications never include message content.
Important notes
- Live typing is visible while the other person has the same conversation open. Because text may be seen before you tap Send, do not type anything you do not want the other person to see.
- Enable notifications to receive new-message alerts while the app is in the background or closed. Message content is not shown in notifications.
- Your chat history is stored only on your device. Backup and restore, and moving your history to another device, are not provided.
- A photo disappears from the other person's screen 24 hours after it is sent. A photo they saved to their device is not removed.
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What's New in UnderLine
2.3.2
November 12, 2026
• Added Spanish, Portuguese, Korean, French, German, Indonesian and Traditional Chinese. If your device language is one of them, the app appears in it • Country names in the country-code list now appear in each language • The first-run tutorial no longer shrinks long text too small • Keep chats in movable bubbles inside the app. Typing animates the bubble; new messages add a red dot. Tap a bubble to switch chats
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