Are you tired of having to take your heavy laptop, tangled charger, and clunky card reader with you on trips? Would you like to be able to quickly read and respond to encrypted emails from home or while on the road?

The U.S. engineered Sub Rosa secure web browser supports web site access from an iPad or iPhone with strong, two-factor authentication using a CAC or PIV. Sub Rosa is the only mobile browser available that allows you to access Defense Travel Systems (DTS) and sign/encrypt/decrypt email through Outlook Web Access (OWA).Full access to calendaring makes managing and coordinating meetings easier than ever.

Sub Rosa is FIPS 140-2 validated and approved under DISA's DoD Mobile App Store.

Web, web email, portal,and collaboration site access are supported, including Microsoft Outlook Web Access (OWA), Defense Travel Systems (DTS), and SharePoint, for example, U.S. Military AKO, NKO, and AF Portals.

Thursby is the market leader in secure Apple Department of Defense (DoD), government, and highly regulated enterprise integration, delivering the security features absent in native Apple and generic enterprise tools. Thursby is US owned, operated, and General Services Administration (GSA) listed, delivering innovative Apple products and services for three decades.

You can find our quick start guide here -

Thursby technical and commercial support is by real people, over the phone and by email from Arlington, Texas. Please contact us via,, or +1 (817) 478-5070.

The Sub Rosa app license is bundled at no additional cost with licensed card readers (Thursby or Identive). To use a Precise Biometrics Tactivo Reader please purchase Sub Rosa Pro.

Sub Rosa supports industry and U.S. Government standards including ISO 7816, NIST IR 6887, HSPD-12, OMB-11-11, FIPS 140-2, and FIPS 201 (with an approved reader). Most popular smart card types are supported including CAC, Dual Persona CAC, PIV, and PIV-I.

** NOTES **
• Full support for HTML5 and JavaScript (not the same as Java) standards for cross platform secure web access
• Perceived performance depends on Wi-Fi or cell bandwidth, internet “weather” and back-end data center or cloud infrastructure
• Apple's iOS iPad and iPhone operating system DOES NOT support Adobe Flash, Microsoft ActiveX or Oracle Java (not the same as JavaScript)
• Please note that Thursby apps may not function correctly and are not supported on “jail broken” devices for security reasons
• Sub Rosa is an integral part of the Thursby PKard Toolkit secure app development and policy management ecosystem
• The iTunes app is an individual/consumer distribution, custom builds are available for organizations

What's New

Version 4.0.7

Very minor change to how Thursby certificates are trusted.

Ratings and Reviews

3.5 out of 5

63 Ratings

63 Ratings


Hyperion Overlord Magentus XI

I have only had the PKard Reader and the Sub Rosa app for a short period, and I am already absolutely sick of it. As anyone can see from the other reviews, sometimes it works great and sometimes it doesn't work at all. A product that is all over the place when it comes to performance is just not reliable and will almost certainly fail when you need it the most.
I have been on the telephone with support consistently since I plugged in, and even the tech guys were largely stumped. We tried several things, some of them multiple times, until after about 20 minutes something finally worked after I unplugged the reader and plugged it back in. That is NOT a solution for a quality product. I specifically asked if I was going to have to go through the same nonsense every time I tried using the product, and the reply was a hesitating, "Well, you shouldn't...". You're darn right I shouldn't, but I do...and that is why I gave a single star. I am sure anyone reading this review can tell that I have had it up to my ears with this nonsense.

Developer Response

I would like to hear more about any troubles you had with our support team. Please contact me directly. Carl Ketterling, Director Customer Support,, 817-478-5070



Before update 4.0 the app was buggy and it took some time to load but at least it opened. Now it doesn’t even open. This is my third review and Developer keep saying please email us and reach us over the phone; when I do so and give them the logs all I get in response is “ It’s an Apple Issue that we are working with them to correct” or I get the typical everything seems fine.

After working several weeks with the lead customer support team they were able to identify the issue that I was having with the constant disconnection and not been able to access any of the websites. Once I have tested for several weeks and everything works well it could be a 5 start app. The customer support have been great and constantly checking on the issues.

Developer Response

Pikuko, I would like to make this right. Please contact me directly.
Carl Ketterling, Director Customer Support,, 817-478-5070

iOS and Office 365...not working


This app was great, minus a few hiccups, until the switch to Office 365 was made. The plan was in the works for a while in the military but this company didn’t seem to plan for the change. You can no longer read/write encrypt any message.

- No notification to customers
- App for Office 365 is clunky and wastes your time
- Almost impossible to use on a phone
- All around terrible now

Until they fix the compatibility don’t waste your money if you need it for an iOS device. The website now is misleading, as of 9 Feb, the second bullet that states
“Sign, encrypt, decrypt email with zero-data-at-rest on the device” is not true. You can’t encrypt/decrypt.

I have a Thursby Card reader for sale for $.01 contact me at.....

——————————Update 23 Feb
I reached out to support the same day I wrote this review on 9 Feb. I used your chat function from the website. I described the issues and the person offered no solution. I use the link provided in the App for office 365. I can access some other websites, however webmail is a waste of time. Every single message that has been encrypted shows, “this message has no content”.

I used the word Clunky to describe accessing Office 365. I know it’s just office 365 because every other website I can get to responds much faster. Still disappointed and CAN NOT recommend for anyone who wants to access Office 365 email.

Developer Response

Support for Office 365 will be available in the next major release of Sub Rosa and Sub Rosa Pro which will be available in the near future. If you would like to help test before the release, please email that request to me directly.

-- Carl Ketterling, Director Customer Support,


Thursby Software Systems, Inc.
42.8 MB
Requires iOS 8.2 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
You must be at least 17 years old to download this app.
Unrestricted Web Access
Copyright © 2011-2018 Thursby Software Systems, Inc.
In-App Purchases
  1. Smart Card Reader - Tactivo $119.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

More By This Developer

You May Also Like