Sicher from the IM+ team promises to keep your messages 'super-safe'

Sicher from the IM+ team promises to keep your messages 'super-safe'

Sicher, a new "super-safe" messenger has arrived today on Windows Phone, iPhone and Android devices. Sicher (pronounced "Zee-her") comes from the team behind IM+ and brings free, encrypted chats and file transfers to users. Using the app, you'll be able to chat, send files, photos and voice messages to other users. Sicher goes so far as to not show incoming messages on your lock screen (only an alert) so you have to open the app to get the full message. Sicher features secure end-to-end encryption of messages, files and group chats, anonymous push notifications and self-destruction message settings.


"Only your peer, the holder of original private key, can decrypt the message you sent. Moreover, once your peer receives the message, we delete all of its traces from our servers. And there's a self-destruction timer for everything you send, as well as an option to force-purge existing conversation. The only way for third-party to see your communication is the app on your smartphone, so if Sicher is your primary secure messaging tool, we recommend to set a device-level password in application settings to prevent unauthorized opening of the app. The password itself and the data stored on device are also heavily encrypted."


Nothing is stored on servers, so once your messages are delivered, any trace gets deleted and it can only be read by the recipient. Sicher uses contact matching via phone numbers in your address book to find your friends, so you'll have to have some digits before you can start chatting things up with your buddies. Other features include:

Sicher 1.0

  • Point-to-point encryption of text messages and files (pictures, videos, .pdf's, .doc's, .xls's, etc.)
  • Timer for self-destruction of messages or manual purge of chats on all ends of conversation
  • Group chats
  • Anonymous Push notifications
  • Password-protection of the app along with heavy encryption of all data stored on device
  • Operated and located in Germany for maximum security and privacy
  • We don't send crash logs, don't track usage statistics, don't use any advertising engines, don't integrate social network SDKs

Sicher is available now as a free download from the Windows Phone Store, though future versions may offer in-app purchases for non-core functionality.

QR: Sicher


Reader comments

Sicher from the IM+ team promises to keep your messages 'super-safe'


This is a really nice app from SHAPE. I'm impressed with how many features (that work) right out the gate. From file sharing, notifications everywhere, etc. it's an impressive "secure" alternative to other messaging apps out there. Curious if it will catch on or not, but you have to be excited to see Windows Phone co-launch with iOS and Android all at once.

Good to see the respective devs made the app for windows phone on time. There are many messengers out there which have great features still we use that stupid watsapp bcoz we have our most contacts there.

I'm really excited to see WP is treated as a 1st class citizen rather than an after thought. Just wondering... is the app number agnostic or it's fixed to your mobile number. I have been seaching high and low for a number agnostic messaging app that would allow me to pickup either of my phones and still gets my messages synced. 

Schmooze is one of it but the notifications are patchy. How's your short experience with this one?

I installed it and will be demoing it as a replacement. I've been having issues with Telegram's private messaging and I'm fed up.

Are you sure that's the right pronunciation. Looks like the German word for secure to me, which is pronounced slightly different

Well I think they tried to find an easy-to-read pronunciation close enough to the german original (depending on your dialect, it's fairly close). As this isnt a language-centered-app it seems sufficient to me.

On a sidenote, the App is made in Germany... so I hope they know how it should be pronounced ;)

Sicher means sure in English. It is pronounced like the end of the word 'easy' plus 'cher' is similar to the word 'hair'.

Actually, in this context it means "secure" or "safe". I don't think a german speaking person would understand the word with this pronunciation. It really doesn't matter though.

Sicher can mean "sure" in context, but also means "secure" or "safe". Pronunciation is also somewhat dependent on what dialect of German is spoken. "Zee-her" is a roughly close pronunciation for native English speakers given their difficulty in pronouncing the German "ch" properly. If you say it really quickly is sounds somewhat close.

Yeah, I was trying to think of a way to spell it out phonetically, bur most people wouldn't get it unless they know how to say the "Ch". In any case, it is what it is, and people everywhere will pronounce it differently. The whole reason I even clicked on the article was because I knew there would be German language lessons involved haha.

Haha! Me too! :D
As being German myself it is always funny to see others struggle with it :P

Same probably goes for any language! It is always funny to see people fail with pronunciation as a native speaker :)

Unfortunatly I dont trust a app which claims to be super safe if I cant have a look at the source to confirm it myself

That's certainly fair, although even assuming it's not totally secure, the local security stuff e.g. password to open the app and auto-deletion of messages/media is already a step above other offerings on the market.

I couldn't agree more... But yet the app is quiet new before we consider it "safe"... Although we should give it a try.

Looks like a really nice platform. Unfortunately, it's up against Whatsapp (which for all its issues - security and otherwise - is still the defacto sms platform for most people).
I hope this app succeeds though. More privacy can only be a good thing

I have just installed this on my 1020 then checked the Play Store for my Android phone but it's not currently available yet. It's good to see a new app available for Windows Phone before an Android version.

Great to see that this is hosted in Germany. They actually value privacy over there...
Shame on America for treading on their citizens rights in the name of security.

MORE messengers?? Like, just let WhatsApp and Viber be, obviously they will have no competition or decline ever.. Unless the Skype team pulls the Pisa tower out of their behinds and finally offer the best Skype experience to its home OS.. Still no file transfers for fuck's sake..

 i know what you mean,i tried skype on friend's HTC One and i was shocked at the experience they have on their OS as compared to our home OS

Because it can send location, because it can send all files, because it can access your contacts, because it can run under lockscreen.

Any other questions? lol I mean, look at what the app can do, of course it will have a lot of permissions.

It's going to be a tough battle to gain any marketshare but at least if it takes off we already have it. Still can't see mass of people dropping WhatsApp at once though.

It's main pull will be security. Not everyone will need this and I doubt they expect to outgrow WhatsApp and the other IM clients. At least, not immediately. Looks like a good business solution to compete with BBM, however.

Am not getting verification code when trying to register it then how can I use it.......

And I have checked my number its same only... May be server not pushing a text

This app looks great including new features such as self destruct messages etc. Probably features will be copied across other messaging apps but still a new innovation.

damn. when i saw the cover picture for this article first, i thought its a Skype app update.
ah, wishful thinking.
anyways all the best to Sicher! :)

I am having trouble registering my phone number. The app asks for verification code but I didn't receive any. How am i supposed to register.

Has anyone got it running? It quits after the welcome screen ... (8X with latest Dev Preview update)

Sicher means safe in German. So makes sense it is a safe app lol

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Worked fine for me so far. I am thinking that there might be quite a few people trying to get registered.

Can't get confirmation code... And its not an exclusive wp8.1 problem, tried it on a colleage android phone and the app kept freezing and never sent a confirmation message

Worked just fine over here on a Lumia 925 and Xperia Z2. I'm liking it so far. Been sending messages and pictures so far. Everything just works, including push notifications. Strange that so many are having problems...

Want to use it asap ! But one thing that sucks is I can't register! The verification sms doesn't arrive at all! I use two phone numbers, on one it now says SMS SENDING LIMIT EXCEEDED coz probably I tried too many times. Uninstalled and reinstalled the app, nothing changed!

I'm getting the same thing as far as it keeps asking me to create a new password. 

I can finish the install just fine and I am able to get the SMS code, it's just that when I leave the app and come back, it asks me to create a new passcode. Frustrating.

Actually, for those having problems with 'Sicher' or generally weighing their options on secure messengers, there is another candidate, with similar features: SCHMOOSE. (

Contrary to 'Sicher', it uses 2048 bit encryption keys (some experts apparently deem 1024 bit not entirely secure anymore).