| Developer: | 文焕 陈 (1) | ||
| Price: | $0.99 | ||
| Rankings: | 0 | ||
| Reviews: | 0 Write a Review | ||
| Lists: | 0 + 0 | ||
| Points: | 4 + 0 ¡ | ||
| App Store | |||
Description
Si4Key is a privacy-first companion keyboard designed to enhance your existing input method with seamless local encryption, one-tap digital signature, and offline key management.
Whether you’re sending private messages, signing documents, or inputting sensitive data, Si4Key ensures that every keystroke stays secure — without changing how you type.
Key Features:
• Local-first encryption — your input never leaves your device
• Built-in support for OpenPGP/GPG digital signatures
• Offline key storage — no cloud syncing, you’re in full control
• Minimal and intelligent design — easy to use, smart when needed
• Supports multiple languages with future-ready architecture
Why Si4Key?
Because your input method deserves the same level of protection as your data. Si4Key doesn’t replace your keyboard — it strengthens it.
“Typing should be private. Signing should be simple. Si4Key makes both possible.”
What's new
- Version: 1.2
- Updated:
- Did you know? PGP messages are often too long to send easily to friends. But Si4Key has introduced a creative solution—PGP Message Relay. It uploads your encrypted message to the cloud and gives you a short link. You can then share this link with your friends, allowing them to access the content.
Most importantly, you’re always in control—you can enable or disable this feature in settings.
Also, the message stored in the cloud is temporary—usually kept for only one hour, which greatly improves security.
You can easily send the short link via iMessage, making your conversations clear and concise.
Price
- Today: $0.99
- Minimum: Free
- Maximum: $2.99
Track prices
Developer
Rankings
Not found ☹️
Lists
Not found ☹️
Reviews
Be the first to review 🌟
Additional Information
Contacts
- Website:
https://si4key.com
«Si4Keyboard» is a Utilities app for iOS, developed by «文焕 陈». It was first released on and last updated on . The lowest historical price was $0.00 on , and the highest was $2.99 on . This app has not yet received any ratings or reviews on AppAgg. AppAgg has tracked 4 confirmed downloads plus 0 indirect launches for this app. Available languages: Arabic, Chinese, English, French, German, Japanese. AppAgg continuously tracks the price history, ratings, and user feedback for «Si4Keyboard». Subscribe to this app or follow its RSS feed to get notified about future discounts or updates.
You may also like
-
- My Verizon
- iOS Apps: Utilities By: Verizon Wireless
- Free
- Lists: 2 + 3 Rankings: 5 (1) Reviews: 0
- Points: 2 + 5,334,172 (4.7) Version: 21.2.1 Meet the My Verizon app. Everything Verizon all in one place. When you launch the app you ll see all the latest just for you. This is your personalized view, with customizable ... ⥯
-
- myAT&T
- iOS Apps: Utilities By: AT&T Services, Inc.
- Free
- Lists: 3 + 1 Rankings: 5 (1) Reviews: 0
- Points: 0 + 4,050,931 (4.0) Version: 2025.8.0 Bring your world together with the myAT&T app! View and manage your connected devices, pay your AT&T bill, test your internet speed, add a line, upgrade to the newest iPhone and more. ... ⥯
-
- iOS Apps: Utilities By: Google
- * Free
- Lists: 11 + 9 Rankings: 5 (1) Reviews: 0
- Points: 7 + 3,326,463 (4.6) Version: 383.0 Download the Google app to stay in the know about things that matter to you. Try AI Overviews, find quick answers, explore your interests, and stay up to date with Discover. The more ... ⥯
-
- My Spectrum
- iOS Apps: Utilities By: Charter Communications
- Free
- Lists: 2 + 1 Rankings: 0 Reviews: 0
- Points: 1 + 2,968,691 (4.8) Version: 13.16.2 One app all your services! We ve made it even easier for residential customers to sign in and manage your Spectrum account with My Spectrum App. Pay Your Spectrum Bill Pay your bill ... ⥯
-
- Calculator₊
- iOS Apps: Utilities By: Impala Studios
- * Free
- Lists: 3 + 2 Rankings: 5 (1) Reviews: 0
- Points: 6 + 1,679,190 (4.7) Version: 9.17.0 America's #1 Calculator App! Download Calculator Now - Your All-in-One Math Solution! We're excited to announce the biggest update to Calculator in 10 years! With over 200 million ... ⥯
-
- QR Reader for iPhone
- iOS Apps: Utilities By: TapMedia Ltd
- Free
- Lists: 2 + 0 Rankings: 0 Reviews: 0
- Points: 1 + 1,344,251 (4.7) Version: 9.5 The most simple & easy QR Reader - download now for FREE! Now scans QR codes, barcodes, puzzles, business cards and documents. FEATURES - Code Scanner - scans QR codes & barcodes - PDF ⥯
-
- GIF Keyboard
- iOS Apps: Utilities By: Tenor
- Free
- Lists: 1 + 0 Rankings: 0 Reviews: 0
- Points: 2 + 1,308,404 (4.7) Version: 4.23 Say more with GIF Keyboard by Tenor. Add tone to your conversation. With Tenor s GIF Keyboard for iPhone, iPad and iMessage discover or create the right GIF or video to visually sum up ⥯
-
- Xfinity
- iOS Apps: Utilities By: Comcast
- Free
- Lists: 0 + 0 Rankings: 0 Reviews: 0
- Points: 0 + 1,225,381 (4.3) Version: 5.57.1 Your Xfinity experience, enhanced. Easily manage all your services in one place with the Xfinity app. Plus discover the power of NOW. NOW is a simple new way to get internet and ... ⥯
-
- Amazon Fire TV
- iOS Apps: Utilities By: AMZN Mobile LLC
- Free
- Lists: 0 + 0 Rankings: 0 Reviews: 0
- Points: 3 + 1,202,878 (4.5) Version: 3.7.0 The free Amazon Fire TV mobile app for iOS enhances your Fire TV experience with simple navigation, a keyboard for easy text entry (no more hunting and pecking), and quick access to ... ⥯
-
- Voice Memos
- iOS Apps: Utilities By: Apple
- Free
- Lists: 2 + 1 Rankings: 0 Reviews: 0
- Points: 0 + 844,314 (4.8) Version: 2.4 Voice Memos turns your iPhone, iPad, or Apple Watch into a portable audio recorder, making it easy to capture and share personal notes, song ideas, family moments, classroom lectures, ... ⥯
-
- RentCafe Resident
- iOS Apps: Utilities By: Yardi Systems, Inc.
- Free
- Lists: 0 + 0 Rankings: 0 Reviews: 0
- Points: 0 + 772,994 (4.8) Version: 25.6.6 The RentCafe Resident app is your partner in all things related to your community, especially when you re on the go. We make it easy to pay rent, request maintenance, or reserve ... ⥯
-
- NETGEAR Nighthawk - WiFi App
- iOS Apps: Utilities By: NETGEAR
- Free
- Lists: 1 + 1 Rankings: 0 Reviews: 0
- Points: 2 + 672,814 (4.7) Version: 2.46.0 Do more with your WiFi using the NETGEAR Nighthawk app. Access your router s features and manage your network from anywhere after quickly setting up your WiFi in just a few steps. The ... ⥯