Zhi vs OnlyU+

Zhi - A Zero-Trust End-to-End Encrypted Instant Messaging App - Zhi is based on pre-shared keys, instead of generating keys through server intermediaries like other applications. - Zhi uses simple network protocols and encoding to more easily audit the content being transferred. - Zhi replaces metadata with random UUIDs. - Zhi makes every chat isolated. - Zhi only supports chatting with friends you've invited or those who have invited you. Zhi Plus - Zhi Plus is a subscription service. - The period of subscription is a about $4.99/month or $49.99/year. - Payment will be charged to iTunes Account at confirmation of purchase - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period - Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal - You can manage subscription in App Store Setting. - Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable What's included in Zhi Plus - You can enable markdown, the text messages you sent will be rendered in Markdown format. - You can use Meeting that is over TURN and end-to-end encrypted. - You can send a single text message of 30KB(after encrypted), while free users are limited to 3KB. - You can enable original image, the images sent will not be compressed and will be sent as original images. - You can send a single image of 10M, while free users are limited to 2M. - You can send a single image of 99M, while free users are limited to 10M. - You can send a single file of 99M, while free users are limited to 10M. - Unlimited number of Chats, while free users are limited to 100. - The server indefinitely stores the encrypted messages from Chats of Zhi Plus users. When forwarding the encrypted messages of a Chat, for free users the server will by default save them for 7 days to facilitate the users retrieving messages from the server when they come online from being offline or at other times. Note: The server's cleanup mechanism runs a scheduled cleanup task. If it is detected during the run that there are no Zhi Plus users in the Chat, the encrypted messages from more than 7 days prior within the Chat will be cleared. About Zhi Plus Even with the free version of Zhi, normal use is possible, and it does not compromise the feature of end-to-end encryption. Zhi Plus is a paid option that allows paying users access to more generous features, which compensates for some of our server costs, allowing us to continue to keep it free for everyone. By subscribing to Zhi Plus you agree to the policy and terms below. Standard Apple Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms of Service: https://www.txthinking.com/terms.html Privacy Policy: https://www.txthinking.com/privacy.html

4UONLY is a private messenger built for exactly one relationship - the one that matters most. Unlike group chats and social feeds, 4UONLY connects you with a single trusted person through end-to-end peer-to-peer technology. No servers store your messages. No algorithms read your words. HOW IT WORKS Pair once with one person using an invite code or QR code. Your connection is direct, encrypted, and private by design. Messages travel peer-to-peer via WebRTC - the same technology used for secure video calls - so they never touch a central server. When both of you agree, a message can be saved locally. Otherwise, it disappears when you close the app. FEATURES - One-to-one pairing: connect with exactly one trusted person - P2P messaging: messages never stored on any server - Messages leave no trace: nothing is saved locally unless your partner explicitly agrees - Auto-clear on close: every message on both devices is permanently deleted each time the app closes - Change your name anytime: update your display name whenever you like; your partner sees the change instantly. Can also change your partner's display name. - Unpair in one tap: break the connection at any moment; all conversation history is deleted immediately with no trace left behind - Encrypted channel: your conversation channel is always secured end-to-end - Voice and video calls: clear, private calls directly between devices - File sharing: send photos and PDFs up to 5 MB - Face ID / Touch ID lock: biometric protection to ensure only you can use the app - Screen capture protection: content is hidden when the screen is being captured or recorded PRIVACY FIRST 4UONLY collects no personal data, not even your IP address. No account required. No phone number. No email. Your pairing information lives only in your device's secure Keychain and never leaves your phone. FREE TRIAL AND PREMIUM Your first 30 days are completely unlimited - no credit card required, no restrictions. After your trial ends: Free tier (always available): - 100 messages per day - 20 minutes of calls per day 4UONLY Premium: - Unlimited messages - Unlimited calls - All future features included Premium pricing: - Monthly: US$1.99 / month - Yearly: US$19.99 / year (save approximately 17%) SUBSCRIPTION TERMS - Payment will be charged to your Apple ID account at confirmation of purchase. - Subscription automatically renews unless cancelled at least 24 hours before the end of the current period. - Your account will be charged for renewal within 24 hours prior to the end of the current period at the same price. - You can manage and cancel your subscription in your App Store account settings at any time after purchase. - Any unused portion of a free trial period will be forfeited when you purchase a subscription. TECHNICAL NOTE 4UONLY uses WebRTC peer-to-peer technology. On some networks, a TURN relay server may be used to establish the connection. Relay traffic is never logged or stored. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/