Google Play Store Comments

Last updated May 9th, 2014

Curious about Cryptnos for Android? See what other users have been saying before you give it a try…

5 stars by Dirk Ducati on March 18, 2014

Cool Just what i was looking for!

Glad we could help you out, Dirk!

5 stars by Denis Dimick on Jun 15, 2013

Just what I needed Works nice on my rooted Nexus 7, running 4.2.2 FINALLY a smarter way to generate passwords

Thanks for the comment, Denis. And since you left us one, I’d like to add a couple comments of my own. First, there are lots of great password generating apps for Android now besides Cryptnos, but we’re happy you chose us. Second, as Denis plainly points out, Cryptnos works well on any Android device, including phones and tablets. And third, while we don’t anticipate problems with rooted devices and alternate Android builds, we don’t officially support them. That said, I’m definitely glad to see Cryptnos isn’t causing problems on your rooted Nexus!

5 stars by Phil Waecker on May 11, 2013


5 stars by Raja Hussain on Apr 29, 2013


5 stars by Antero Jesus on March 12, 2013

Good Very good app protect yourself from the hackers

Thanks for the five stars, Antero. Don’t forget that a strong password is only one aspect to protecting yourself online. There are many ways for hackers to compromise your accounts, so it helps to always remain vigilant.

5 stars by Adam on November 15, 2012

Makes security easy It works well on droid bionic gingerbread, easy to use and gui isn’t cluttered. Great tool for password security.

Thanks for the great comments, Adam. The items you mention are all things we strive for, so we hope that means we’re meeting those goals!

I would also like to add that we specifically aim to make Cryptnos as widely available as possible. Adam specifically mentions Gingerbread (Android 2.3), but Cryptnos currently works on Android 1.1 and later, including the most recent releases. That means that virtually every Android device in existence should be able to run it. While Google’s changes to more recent Android APIs may eventually make this level of backward compatibility difficult (or even impossible), we plan to maintain this level of flexibility for as long as we can. We think making security tools available to everyone is more important than having the latest bells and whistles.

5 stars by Sotong_84 on October 8, 2012

Perfect! I have been looking for this for awhile now!

Well, I don’t think we’d call it perfect, but we’re definitely glad Cryptnos has been a big help to you!

5 stars by Elvera on July 15, 2012

Amazing app Really convenient, been using it for my third smartphone already

Thanks for sticking with us, Elvera! We try to keep Cryptnos simple and to the point.

For those who don’t realize it, it’s not too difficult to keep your password parameters in multiple places. For Android devices, you can easily copy a set of parameters from one device to another with the Export to QR Code feature. Similarly, if you have Cryptnos for Windows as your “master” copy, you can export parameters from there to your Android devices with a quick QR scan. Going from one Windows client to another requires a quick file export and import. That said, keeping everything in sync can be a bit cumbersome, and we realize that it’s less convenient that it should be. The good news is that we’ve got plans in the works for making that easier to do. Unfortunately, we don’t have an ETA on when that new feature will be ready.

5 stars by An.d.B on July 2, 2012

Fort Knox!!! I absolutely love this app! This app is the ullimate password encryptor and password generator on the Android Market, and on the computer.Store files on the sd card with an encrypted password or store them to your dropbox cloud, and have them available on all of the devices you use. This app is a must if you’re concerned about securing your passwords with the highest level of security and encryption!

Thanks for the quick analysis, An.d.B, and for the interesting Dropbox hint! (I use Wuala myself, although I move the files manually and only use it as an off-site backup.) Cryptnos export files are always encrypted and can be read by both the Windows and Android clients, making it easier to keep the two in sync. That said, we’re looking into a number of possibilities for making synching multiple clients automated and much simpler; more on that in the coming months.

5 stars by adrianvega on August 4, 2011

A password manager MUST be open source.

We heartily agree. We here at Cryptnos firmly believe in the ideals of Open Source, and one of its biggest strengths is transparency. If one cannot see what a piece of software is really doing behind the scenes, how can one truly trust it with sensitive information? This is especially true for security software; transparency provides a window into what the application is actually doing with your valuable data (in this case, your passwords).

Transparency, of course, is a double-edged sword. Critics of Open Source claim that exposing the source code provides more opportunities for malicious coders to search for exploits. Of course, Open Source advocates claim this is not a weakness but another strength. By exposing the code to greater scrutiny, it becomes not only easier to find vulnerabilities but to also patch them, making the final product more secure over all. We at Cryptnos welcome such scrutiny and graciously accept vulnerability reports and patches.

4 stars by DufusMaximus on July 6, 2011

Base64 + md5 ftw

Thanks for the four stars, DufusMaximus. I would suggest, however, that you might want to consider a stronger hash algorithm than MD5, considering that algorithm has know weaknesses that leave it susceptible to attack. If you’re using MD5 to keep your password length shorter, you can use the length restriction option to set the maximum length of the generated password. At a minimum, you may want to increase the number of hash iterations to further distance your input parameters from the generated result.

5 stars by Matt on June 22, 2011

My goto for strong passwords. Highly recommended

Thanks, Matt. While there are plenty of great options for generating and keeping track of strong passwords, we’re always honored when anyone picks Cryptnos.

5 stars by Zubair on May 21, 2011

Have been using this for 4 months. Is an essential app. Recent media stories (Google, Sony, Anonymous, HBGary) have highlighted its need.

An updated comment from “Zubair” (see his or her original below). As this comment very succinctly points out, recent high-profile data breaches only highlight and underscore the need for strong data security. While some of these incidents have been outside end-user control (script vulnerabilities, SQL injection attacks, and social engineering have little to do with passwords), a weak password is always an easy vector for attackers to exploit. Whether you use Cryptnos or some other password generator to manage your passwords, we certainly hope more and more people will understand the risks of weak password use and opt to use tools that vastly increase their password security.

5 stars by Mictlantechupi on March 3, 2011

If you know why you should use strong passwords then you will think this is an excellent app. And beautifully simple.

Thanks for the kind words, Mictlantechupi! Yes, Cryptnos is simple, and we think that’s one of its strongest points. It may not be flashy, but it’s intuitive and quick to get in, get what you need, and get out. We try to make increasing your security as easy as possible without compromising it.

4 stars by kunal on February 17, 2011

Awesom. Need better ui

Thanks, kunal. We agree; Cryptnos could definitely stand some prettying-up. UI enhancements are definitely in the pipeline, especially since we’ve been working on some other projects and we’ve learned a few more things about Android UI design.

As stated in the FAQ, however, our primary goal has always been functionality, not aesthetics. We want Cryptnos to work first and foremost, and making it pretty must come later. Specific suggestions for UI enhancements are always welcome, so long as they don’t stand in the way of users being able to do what they came to Cryptnos to do: generate secure, unique passwords.

5 stars by John on January 26, 2011

Love it plus their is no special permissions like internet access.

Unfortunately, there a far too many apps in the Google Play Store that request a lot of useless permissions. Many of these apps ask for these permissions even when they don’t need them, “just in case”. Also unfortunately, far too many Android users simply click through the permissions screen without paying attention to what permissions are being requested.

Why should a password generating program request Internet access? It’s a very legitimate question. Some, like LastPass mentioned below, store your password information “in the cloud” so you can access it from other locations. This is a “feature” that some people look for in a secure password vault application. Here at Cryptnos, we question this idea. Our philosophy is “trust no one”, meaning we don’t want your password data. We don’t want the responsibility of transporting your passwords, and we don’t want you to put that much trust in us. That’s asking quite a bit. We think your passwords are more secure when they remain in your possession and nowhere else. If you want to move your passwords outside of Cryptnos, we think you should be the one to decide when and where that occurs.

The only permission Cryptnos asks for is permission to read and write to your external storage (i.e. SD card). The only reason we ask for that is so we can export your parameters for backup and portability reasons. Cryptnos doesn’t need Internet access, so it doesn’t ask for it. And since we don’t request Internet access, Cryptnos cannot reach the Internet. It’s that simple. In Android, if you don’t request such a permission, it is implicitly denied. So there’s no way Cryptnos can spirit your password data away to some unknown location without your knowledge; it’s a built-in impossibility. Your passwords don’t go anywhere unless you want it to.

5 stars by Zubair on January 21, 2011

Very useful help files explain how to exploit potential of this app. Don’t be daunted by the simple UI.

Thanks for the helpful comment, Zubair. This brings up a very important point: Cryptnos is loaded with help pages full of useful information about what Cryptnos does (and doesn’t) do, why it does things the way it does, and how to most effectively use it. For Cryptnos for Windows, this is in the form of an external HTML help file, but in Cryptnos for Android the help is built right into the app. On any “page” or “activity”, you can tap the Menu hard button on your device and get a menu that will include a Help option. Tapping that item will take you to a context-sensitive help page related to the activity you were on. All of the help pages are also available from the main menu through a single help index.

As for Cryptnos’ simple UI, we cover that in our FAQ. Cryptnos is simple because we’re focused on functionality, not aesthetics. It does what it does without bloat, bells, and whistles. While we’ll happily accept contributions from anyone wishing to help make the app prettier, we do ask UI enhancements focus on ease of use and functionality first and visual fluff last. Any UI “enhancements” that bog down the app and make it slower, fatter, or harder to use are not welcome.

5 stars by Christopher & Brooke on October 4, 2010

Switched to LastPass, which gives more parameters including min numerals. LastPass also retrieves saved passwords, even within Dolphin. Samsung Moment

We’re glad to see Christopher & Brooke found a solution that works best for them. (See their original comment below.) LastPass is an impressive password management solution. I’ve seen some very positive, thorough analysis of their system, which seems sophisticated, versatile, and secure. We wish C&B the best (and definitely thank them for leaving us a five star rating despite the fact that Cryptnos wasn’t all they hoped).

That said, while LastPass is indeed very well thought out and fundamentally secure, there is one aspect that kept me personally from considering it for my own needs. While it’s great to have an off-site backup of your authentication data, you have to place a great deal of trust in the LastPass team that their software works exactly as their documentation implies. While they say they encrypt your data and only you have the key, once your data leaves your possession there is no guarantee that this is what they will actually do. Folks in the security field call this a “trust no one” philosophy. While I personally believe that LastPass indeed operates in the manner they describe, I can’t say with 100% unshakable certainty that this is true. Anyone truly concerned about the security of their data must be skeptical of any solution that purports to make security “easier”, a skepticism which I hope all users of Cryptnos apply to our software as well.

Cryptnos never sends your parameter information anywhere without your knowledge. While it does not automatically back up your data “into the cloud”, it provides you with an export mechanism by which you can do this yourself. A good backup strategy should always include an off-site (or in this case, off-device) backup, and we let you decide where and how that data is secured. Our source code is open and freely available so you can decide for yourself if what we claim our software does is true. While folks who install Cryptnos from the Google Play Store do require a bit of trust in us, anyone who is more skeptical can inspect the code and compile it themselves to be absolutely certain.

As for the minimum number of numerals in a given Cryptnos-generated password, please see our response to C&B’s previous comment.

1 star by raychall on September 13, 2010

Hard to figure out. Need something simple and to the point.

Cryptnos isn’t for everyone, although we certainly wish it were. It relies on a number of complex concepts that are difficult for some people to digest, especially if they don’t come from a technical background. Admittedly, there’s a lot we can do to improve its user interface, usability, and documentation. Of course, since Cryptnos is Open Source, anyone can contribute to help make it better, and we certain hope more people will.

While we obviously wish raychall had rated us higher, we do hope he or she can find another utility that suits his or her needs. There are tons of password vaults and utilities in the Google Play Store, so there’s bound to be something that fits his or her requirements. Of course, we can’t guarantee the security of any other application, so I’m hesitant to recommend anything in particular.

5 stars by Christopher & Brooke on August 3, 2010

Works as described, but I can’t select required parameters like: must be 6-8 characters, contain at least 2 letters and 2 numbers.

To meet the length restriction, set the length restriction to the maximum length (in this case, 8); there’s no reason to go shorter when longer is always more secure! 🙂 As for minimum character type restrictions, we’ll consider that for a possible future update. (You can provide further feedback in this issue in our issue tracker.) However, statistically, you’re very likely to get at least two letters and two numbers in a generated password and the letters should always be in mixed case, so this user’s immediate concern shouldn’t be an issue. Requiring different symbols, however, might be, as by default only two symbols (plus sign and forward slash) are currently generated. Please see this news post for further explanation and ideas.

5 stars by mark on August 2, 2010

Wow! Perfect!

We’d never go so far as to call it “perfect”, but it’s perfect for our own personal needs, and lots of others seem to think so too. Thanks, mark!

5 stars by vincentc on July 2, 2010

No net access needed; won’t store pwds, just pwd gen params; not limited to a master pwd; can use single master and still get diff pwds per site.

A nice, concise summary of some details we couldn’t put in the Google Play Store description. Thanks, vincentc!

5 stars by hs on May 28, 2010

Probably top 3 most useful application out there!! (HTC Hero)

Wow, great praise, hs! And his/her HTC Hero runs HTC’s Sense UI, which just proves that Cryptnos works well with non-“vanilla” Android setups as well.

5 stars by Stephen on May 18, 2010

Good stuff, made my Ebay safer than a steel condom

By far the most popular comment among my coworkers at my day job. Um, thanks, Stephen… I think! 😀

5 stars by Daniel on May 14, 2010

Fantastisk program! Väntar på kommande version som kommer att vara kompatibel med Windows!

Google translation: Great program! Waiting for the next version that will be compatible with Windows!

Daniel, did you happen to miss Cryptnos for Windows? As of version 1.1 for both platforms, import/export files are cross-platform, so they should both be completely compatible.

5 stars by Craig on April 11, 2010

Excellent app, works great on Eris

Another HTC Sense UI. Thanks, Craig!

5 stars by Klink on April 10, 2010

Does what it says Hero

We certainly hope it does what it says. Otherwise, we’d be lying. 😉

5 stars by Brandon on April 9, 2010

Nice! Does what it says, though i’ll need to get the pc version for use @ home

We like to think of Cryptnos as a package; use the Android client on your phone, the Windows or Java client on your desktop, or Cryptnos Online while on the go (and away from your phone). Passwords generated by one will work with all the others. It’s not perfect (despite what mark says above), but it works well enough for us. Hopefully, it will work for you too.

Note: Google Play Store quotes are taken directly from the Play Store Developer’s Console and are submitted by users through the Play Store application. These comments are public to any Android user and visible by visiting the Cryptnos details page in the Play Store. If you have posted a comment to the Play Store and don’t want to see it posted here, please let us know and we’ll remove it.

Play Store rankings are an average of all rankings provided by users who have installed the software via the Play Store. Not all users provide rankings, and not all rankings supplied have comments, meaning some ranking data is not visible here.