Safenote is the free, fast, and secure way to share files and notes with end-to-end encryption and a link that expires automatically. And also it's a free cloud-based service that is functioning via an encrypted SSL tunnel. Safenote doesn't require you to create an account before start using the service and no password or email required. This free service enables you to send a self-destructing message or file to someone. This means once they view the message or download the file, they will no longer be able to access it again after the view count has reached zero. This ensures your message is read by no one but the reader and all evidence of the message is erased. Messages are also anonymous unless you add any identifiable information to your message. If you share your passwords or private, sensitive data via email or chat, copies of that data are stored in a number of locations. If you use Safenote instead, the data stays for a single viewing, which ensures that someone else can't read it later. It allows you to send sensitive information in a secure manner, ensuring that only one person can see it.
Based on our record, Conversations.im seems to be a lot more popular than SafeNote. While we know about 34 links to Conversations.im, we've tracked only 1 mention of SafeNote. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
AFAIK Conversations is one of the best, if not the best. On F-Droid it’s gratis, on Google Play it costs something. Source: about 1 year ago
Conversations (version 2.12.3): Encrypted, easy-to-use XMPP instant messenger for your mobile device. Source: about 1 year ago
Conversations [1] is the best Android XMPP client I know. IIRC they pushed the adoption of OMEMO and implemented it first, before the desktop clients could catch up. [1] https://conversations.im/. - Source: Hacker News / over 1 year ago
Maybe have a look at Briar or good old Jabber (XMPP) with OTR or OMEMO, e.g. Implemented in Conversations. Source: over 1 year ago
Conversations (version 2.11.0+free): An encrypted, user friendly XMPP instant messaging client optimized for mobile. Source: over 1 year ago
THREE (CREATOR) Go to this link https://safenote.co/ . In that webpage, type in the name of units they wish to use. Then open "Advanced Options" below, create a password. Other settings are optional and therefore, not important for this purpose. Click create message. Then share link to opponent. (Do not give password yet) The other player waits until this step is completed. Source: over 2 years ago
Signal - Fast, simple & secure messaging. Privacy that fits in your pocket.
Privnote - Send notes that will self-destruct after being read
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
One-Time Secret - One-Time Secret is a way to share sensitive information simple and secure.
Element.io - Secure messaging app with strong end-to-end encryption, advanced group chat privacy settings, secure video calls for teams, encrypted communication using Matrix open network. Riot.im is now Element.
1ty.me - If you need to send a password or some other form of simple but sensitive information to someone...