Top Developer

Signal Private Messenger

56,943

Open Whisper Systems Communication

PEGI 3

Signal Private Messenger- screenshot thumbnail

Privacy is possible, Signal makes it easy.

Using Signal, you can communicate instantly while avoiding SMS fees, create groups so that you can chat in real time with all your friends at once, and share media or attachments all with complete privacy. The server never has access to any of your communication and never stores any of your data.

★ Say Anything. Signal uses an advanced end to end encryption protocol that provides privacy for every message every time.

★ Open Source. Signal is Free and Open Source, enabling anyone to verify its security by auditing the code. Signal is the only private messenger that uses open source peer-reviewed cryptographic protocols to keep your messages safe.

★ Be Yourself - Signal uses your existing phone number and address book. There are no separate logins, usernames, passwords, or PINs to manage or lose.

★ Group Chat. Signal allows you to create encrypted groups so you can have private conversations with all your friends at once. Not only are the messages encrypted, but the Signal server never has access to any group metadata such as the membership list, group title, or group icon.

★ Fast. The Signal protocol is designed to operate in the most constrained environment possible. Using Signal, messages are instantly delivered to friends.

★ Speak Freely - Make crystal-clear phone calls to people who live across town, or across the ocean, with no long-distance charges.

Signal is not currently compatible with tablets, but support for larger screens is on our roadmap and will be included in a future release!

For support, questions, or more information, please visit:
http://support.whispersystems.org

More details:
http://www.whispersystems.org/#encrypted_texts

Source code:
https://github.com/WhisperSystems/Signal-Android

Reviews

4.5

56,943 total

5 40,146

4 11,264

3 2,783

2 1,112

1 1,631

Daniel Maguire

Very nice Slick and tightly integrated messaging app. Automatically uses data network to encrypt messages between Signal users, falls back to SMS for others.

Andrew Avila

Not sending No matter full signal, wifi, no signal my messages aren't sending. I actually haven't go into airplane mode and then turn that off before it will send. In most cases it gives an error and before I know it, I get a reply. This didn't always happen, it started about 4 updates ago.

Julien Lefebvre

Bug? 🐛 Everything was fine and work perfectly. I really love this app. Ok here's the story : i recently change my SIM card and phone number then when im using Signal (sms or call) it's my old phone number appearing...... The receiver can call me back or sms back at my old number.... That's weird.... Probably if I uninstall/re-install the app it could be fixed but i haven't try yet. I changed my phone number and i don't want anybody knowing my new one. So on this side i kinda like that "glitch" or bug.

Sherita Brown-Ancrum

Great app for secure messages or phone calls!!! I really like this app...I just would like to send more than one picture at a time... some people I sent pictures to said they did not receive them so I really hope that you all come up with something different to send multiple pictures and to ensure that a recipient gets the pictures.

Abdul-Hakeem Burns

Seems legit according to online reviews, as far as Signal's security and trustworthiness. My only request for the devs would be more color/theme options. Having to manually set the color for each conversation/contact is tedious. If we could set an app-wide default for color themes it would be much easier. Would give 5 stars if this gets added.

Joseph Roncali

Love it still one issue.... My one issue is that you have to turn on your data or WiFi to send or receive multimedia text. So all your group texts can't be read or sent until you have your WiFi or Data on. That being said I love the fact that you can have specific notification alerts for certain people so you can know who is texting you before you look at your phone.

User reviews

Daniel Maguire April 2, 2016

Very nice Slick and tightly integrated messaging app. Automatically uses data network to encrypt messages between Signal users, falls back to SMS for others.

Open Whisper Systems March 5, 2014

A bug report would be great. The GitHub issues tracker is linked from the Play description.

Andrew Avila March 31, 2016

Julien Lefebvre April 11, 2016

Sherita Brown-Ancrum April 1, 2016

Abdul-Hakeem Burns April 6, 2016

Joseph Roncali April 11, 2016

Edd Barrett April 5, 2016

I like this a lot because it is end-to-end encrypted and open source. However, I find it doesn't work well for multiple devices. Since your user account is a phone number (i wonder why they chose this instead of an email address) it means you can't use it on tablets. Also it means you can't login from more than one phone at a time. You can login on a PC via a chrome plugin which you link to your phone. I find this a slightly odd choice too. I would have thought isolating signal from the (hard to audit) chrome code-base would have been a more security-centric decision. Why not a native library which other people can consume to make their own front-ends? Nevertheless, it works very well if you use only one phone and you use chrome as your web-browser. I really appreciate the attention the developers have taken to the user interface. It pretty much looks like google hangouts and is very easy to use. Thanks for your efforts Open Whisper Systems.

Elizabeth bailey April 1, 2016

Good so far. Works good so far. Easy enough for most people to figure out. Had some trouble getting it to work in a sandbox but looks like it is working now. Trying to get other people using it. Some people have complained about pictures being taken inside the app as opposed to attaching from gallery come out a little grainy. But that comes from one person who would probably look to any excuse not to use encryption because that is acknowledging a problem and admitting you can do something about it.

Mark Lewis April 13, 2016

Generally very user friendly and convenient. Only issue is that sometimes it seems that recipients fail to be notified about a new message. That's the feedback I've had from friends in the USA.

Colin Gauthier April 14, 2016

Works great for txting, not sure I like the phone part of it. People say I'm hard to understand on the phone through the app. Happy with all other aspects!

Andy Hernandez April 7, 2016

No issues! Every time I've used it its been fast,easy, and I haven't ran into and glitches or shut downs...pretty much any problem I haven't had with this app yet so that's nice. I usually never leave reviews because most usually always have something wrong with them and its to much time to complain about every thing that's wrong with an app but this ones smooth (: and it deserves some stars🌌

Alexander Course April 2, 2016

SUPERB BUT CAN STILL BE EVEN MORE SUPERB The whole app itself, the security, the UI, the efficiency, is very very good. It'll be better if the users can customise or tweak the appearance of the app itself more. [IMPORTANT: Group SMS or multiple recipients in SMS should also be allowed.] But anyway, the best! Kudos to the developers. May you continue to work as productively in your next projects.

Died Matrix March 31, 2016

Still have massive quality problems Messanges are not delivered every time, some are marked as sent and received but never reached your partner....now integrated call function (from redphone) ist still miserable quality, unstable, crashes etc....thanks to our gouvernments i need this very secure app but please fix this major issues :( @@@Update March 31th@@@: I think app really got improved a lot in point mentioned above, sadly i wasnt able to test if phone call quailty also improved, added some stars, keep going!

Chris Ceja April 5, 2016

It's a great idea to protect and insure privacy A bit glitchy especially on the calls, but overall great app

Daniel Wilbo April 6, 2016

Good but doesn't send reliably With low reception, messages fail often. If I switch to standard sms in same area, instant send success.

Pierced RivetHead April 1, 2016

Does most of what I want It seems secure, according to EFF reports. I haven't used it for anything other than SMS, so I can't comment on all the features. One feature I'd like to see on the future is an obfuscated phone number; a feature where you could create a username of some kind, and people could message you based on a username rather than a phone number. That way I wouldn't have to give it my phone number.

Jim Oltman April 6, 2016

Could use the ability to attach any file to a conversation. Wife and I are having delays in our communications. The past few days, messages have been significantly delayed. Today, I unlocked my phone and immediately got a notification sound. I looked and the message was sent 4 minutes prior. Encrypted Video Conversations would be amazing!

Stephen Tan April 8, 2016

Good ui Usable and secure, a difficult combination. Well done

D.A. W. April 2, 2016

good, but could be great I love the security and the color coded conversations. What they need to do for five stars is to merge the wifi security with the ability to still use over sms when wifi is unavailable. Even if you notify that its not secure...its better than limiting it to only wifi.

Dawn D April 8, 2016

MMS NEEDS FIX - FAILED dwnld, - ALWAYS:/ I really, REALLY love this app.. A LOT. It's a 5 star app in EVERY.. er,.. ALMOST every way.. IF MMS worked. THING IS,.. it doesn't, hasn't. Looks like some others also having same issue too...PLEASE fix? This 3 star is breakin' my heart - A LOT. Please fix MMS 'Failed Download' issue in next update and you'll have my 5-star-love forever! Please..? Xo

Kevin Cheung April 5, 2016

Mostly good Two issues in an otherwise very good app. First, it would be nice to at least be able to customize right swipe behavior in the message log, if not have the default as call instead of archive to better mirror the Android default. Second, I'm having delays/issues reaching ex-users of Signal, whether by text or call (in some cases, because they use the iOS version of the app which is less convenient and in other cases because they upgraded their phones and weren't reachable until they re-downloaded the app)

Grant Abraham April 3, 2016

Pretty good but needs better support for Google Voice numbers It works if you manually input the code or have it call to confirm, but didn't do automatic confirmation.

Lasse u April 5, 2016

Does this use only sms -messages? i dont want to use my money on those, when i have 3G internet connection. Correct me if i'm wrong..

Nashah Yasharahla April 14, 2016

I really love this app This is a great app but I'm giving it one star cause the calling feature doesn't work

Omar Tayel March 31, 2016

Doesn't work on CyanogenMod I have CM12 and the app says it needs to be verified wtf..

Brandon Wood April 7, 2016

Good app. Needs integration. App works as promised. Notification and ring tone sounds do not propagate from custom contact settings. Please fix.

Tony Batten April 11, 2016

It's great but.... Caps lock some times is always on when I first start the app again. I don't put it that way.

Mark Warden April 12, 2016

Trust Seems to work well. I don't know if it's really private, but I trust my friend who recommended this to me.

Nicholas McGahan April 9, 2016

Back on the right track Edit: previously had some issues. Those no longer seem to exist. This app is going back to being my defaults for messaging and calls. I has been using this app since I heard about it, and I'm glad it's working on my phone again.

Ilheis Reign April 6, 2016

Encrypted texts and calls Whisper has now made it even easier for you to keep things private when texting or calling. Great features with simple UI and verification code so you know when people change devices.

Weyman Martin April 8, 2016

Super app - not many users I love this app but just wish more people were using it.

Tom Nunez April 8, 2016

Love the app,but... Wish I can secure my texts. I have the code but cannot figure out how to activate it.

Charles Colp April 3, 2016

Simple encryption for the world This is the best encryption system I have found. I love the phone and text combination and love the whisper tech behind it.

Paula Graham April 4, 2016

Encryption made easy Even the laziest friend can't complain, simple to set up and simple to use. But seems to have extremely annoying bug as the names of my contacts flashes on and off and I can't figure out who sent a text. Pls fix!

Rand Kmiec April 3, 2016

Great app Excellent app that makes security easy. The check marks that confirm receipt of your message and ability to work over WiFi are amazing to have as well, compared with the default messenging apps

Markus Klemmer March 31, 2016

Not perfect but my first choice SMS and online messaging working fine, but - cannot prefer SMS over online messaging - coloring of contacts not editable All other features rock. Thank you very much!

Jules Pénuchot April 6, 2016

Simple as hell No need to get a degree in cryptography to use it. Just launch it, get your contacts to use it and you're done !

Robert R Colp April 8, 2016

Works well I am using this app because it does not leave my text in the open. Too much identity theft risk to allow open text.

Ashley Porter April 7, 2016

It won't let me load mms over WiFi and have yet to figure out how to have more than one recipient. Otherwise great app! I like the little drop down window so I don't have to exit out of the screen I'm using.

Andrew Williams April 13, 2016

Still needs work ***PLEASE ACKNOWLEDGE THIS ISSUE*** Other users may screenshot your messages without your knowledge/approval!!! You deserve 5 stars for encryption & ease of use, but this is a HUGE PRIVACY PROBLEM!!! There is virtually no point in using an encrypted messaging service if there is an option to screenshot conversations (I get that someone could still use another device to get a photo of the screen, but this screenshot option makes it that much easier). GET RID OF THE SCREENSHOT OPTION PLEASE!!!