Thanks to backups, Signal conversations can span over multiple years and multiple phones. These archives can get rather large as you share photos, videos, and other files with friends. But between the other apps and large files on your phone, you might not be able to afford to keep all those messages.
After receiving many requests for the feature, Signal introduced read receipts last year to its mobile apps. However, some users don't like the idea other people knowing when they've read messages. Luckily, Signal lets you disable this feature and reclaim a little privacy.
Messaging apps can be a double-edged sword. Not only do they let you interact with other people, but they also let you go back and reminisce on past exchanges. However, that same archive can be used against you in certain situations. Luckily, Signal can be manipulated to remove any record of past messages.
With Signal's class-leading end-to-end encryption, you can be sure your messages will remain secure as they travel to the recipient. However, once the message arrives, its privacy is completely dependent on the receiver, who could share it anywhere if they wanted. To patch this vulnerability, Signal added disappearing messaging.
If thieves, hackers, law enforcement, or other would-be enemies should ever gain entry to your smartphone, they could also access conversations you've had in Signal Private Messenger. To better secure your encrypted communications, you can password-protect the whole app and its contents — but only on Android. Even then, it's necessary to perform data deletion on a periodic basis, if not immediately.
If you've received a spam message in Signal Private Messenger, you know that anyone can contact you as long as they have your linked phone number. But when it comes to the people you're actually trying to have a private conversation with, how do you know it's really them?
While it's a more secure platform for messages and calls, Signal's job isn't to prevent unknown users from contacting you, so you run into the same issues you would with a regular phone number. People you know that you don't want to talk to may try to strike up a conversation and you'll still get spam messages. Luckily, it's easy to block these suckers.
One thing that makes Signal Private Messenger better on Android over iOS is that you can better secure the app with a password or passphrase. Best of all, you don't need to install an app locker to get this working — you can do it right from inside Signal.
Signal Private Messenger is famous for its end-to-end encryption, but you can't even use the messaging app without having a real phone number attached to it. Luckily, there is a way around this limitation, so you can use Signal even if you don't have a valid SIM card in your smartphone.
