Si4iMsg is made and published by 文焕 陈. AppBrain is an independent app data site and isn't affiliated with 文焕 陈. The app name, icon, screenshots and description belong to 文焕 陈 and are shown as published on the App Store.
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- Last updated
- October 16, 2026
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Releases
Updates seen on the App Store- Version
- 1.0
- Launched
- October 2026
No changelog data
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Technology
Found in the app by AppBrain- Price
- Free
- App size
- 3.41 MB
- Content rating
- Everyone
Technologies used by Si4iMsg
About the app and developer
About Si4iMsg
Si4iMsg is a social networking app developed by 文焕 陈.
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The app has no ratings yet.
App Information
Si4iMsg is freely available from the App Store. The app size is 3.41 MB. The latest version available is 1.0. The last update was on October 16, 2026.
Technical Requirements
The app has a content rating of Everyone. The app has been available on the App Store since October 2026.
Developer information for 文焕 陈
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Store listing
By 文焕 陈, from the App Store
Screenshots by 文焕 陈, from the the App Store listing
Description by 文焕 陈 Written by the developer, not by AppBrain. Click to read.
Si4iMsg turns an iMessage into a capsule. When your friend taps it, the message opens with a reveal effect: fireworks, a thunderstorm, falling cherry blossoms, a stomping T. rex, or the animal of the Chinese zodiac with a New Year greeting. Turn on end-to-end encryption, and only your devices and your friend's can read it.
Everything happens in Messages. There is no account and no sign-up.
REVEAL EFFECTS
• Basic: fireworks, lightning, scratch card, typewriter and flip card
• Weather: wind, rain, thunderstorm, snow, fog, sunshine, rainbow, sandstorm, typhoon and aurora
• Plants: cherry blossom, rose, sunflower, bamboo, maple leaves, dandelion, tree and four-leaf clover
• Dinosaurs: T. rex, brachiosaurus, pterosaur, raptors, a dinosaur egg, a volcano, a fossil to brush free, a fire dragon and a water dragon
• Chinese zodiac: all twelve animals, each with its own entrance, plus a greeting you pick or write yourself
Effects play on your friend's device and follow Reduce Motion and VoiceOver.
END-TO-END ENCRYPTION, WHEN YOU WANT IT
• Off at first, so you can start right away. Turn it on for a conversation with one tap.
• You and your friend swap public keys once, inside the conversation.
• Each device has its own private key, made in its Secure Enclave. It never leaves the device and is never backed up.
• Every message is encrypted on your device for each of your friend's devices and each of yours (HPKE with P-256, AES-GCM).
• Compare a key code in person or on a call to be sure you have the right key.
READ-ONCE AND EXPIRING CAPSULES
• A read-once capsule opens once, then it is gone.
• Capsules can expire after a time you choose.
HOW CAPSULES TRAVEL
Si4iMsg uploads each capsule to a relay server and sends a short link as the iMessage bubble. For an encrypted capsule the relay only ever gets ciphertext. You can add your own relay, or choose "No relay" to carry a short capsule inside the link itself. Capsules without encryption, and every capsule in a group chat, reach the relay as plain text. The readable copies stay on your devices.
GOOD TO KNOW
• Your friend needs Si4iMsg to open capsules and see the effects.
• Group conversations send capsules without encryption.
• In English, Simplified Chinese, Japanese, German, Korean, Spanish and French.
No ads. No tracking.
Everything happens in Messages. There is no account and no sign-up.
REVEAL EFFECTS
• Basic: fireworks, lightning, scratch card, typewriter and flip card
• Weather: wind, rain, thunderstorm, snow, fog, sunshine, rainbow, sandstorm, typhoon and aurora
• Plants: cherry blossom, rose, sunflower, bamboo, maple leaves, dandelion, tree and four-leaf clover
• Dinosaurs: T. rex, brachiosaurus, pterosaur, raptors, a dinosaur egg, a volcano, a fossil to brush free, a fire dragon and a water dragon
• Chinese zodiac: all twelve animals, each with its own entrance, plus a greeting you pick or write yourself
Effects play on your friend's device and follow Reduce Motion and VoiceOver.
END-TO-END ENCRYPTION, WHEN YOU WANT IT
• Off at first, so you can start right away. Turn it on for a conversation with one tap.
• You and your friend swap public keys once, inside the conversation.
• Each device has its own private key, made in its Secure Enclave. It never leaves the device and is never backed up.
• Every message is encrypted on your device for each of your friend's devices and each of yours (HPKE with P-256, AES-GCM).
• Compare a key code in person or on a call to be sure you have the right key.
READ-ONCE AND EXPIRING CAPSULES
• A read-once capsule opens once, then it is gone.
• Capsules can expire after a time you choose.
HOW CAPSULES TRAVEL
Si4iMsg uploads each capsule to a relay server and sends a short link as the iMessage bubble. For an encrypted capsule the relay only ever gets ciphertext. You can add your own relay, or choose "No relay" to carry a short capsule inside the link itself. Capsules without encryption, and every capsule in a group chat, reach the relay as plain text. The readable copies stay on your devices.
GOOD TO KNOW
• Your friend needs Si4iMsg to open capsules and see the effects.
• Group conversations send capsules without encryption.
• In English, Simplified Chinese, Japanese, German, Korean, Spanish and French.
No ads. No tracking.