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 User 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 **
• Sub Rosa's Enhanced OWA Client only supports Microsofts Exchange OWA (2010, 2013, 2016, and Office 365)
• 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 5.0.2

Fix for Dual Persona CACs
Additional bugs and crash fixes

Ratings and Reviews

4.0 out of 5
11 Ratings

11 Ratings

Dr. Nate ,

UPDATED: Amazing Tech Support!!!!

UPDATED: It never fails to call Tech Support direct!!! I contacted Thursby Software, and these guys created a Beta version that allowed me to get my emails back while they fix their Dual Persona/PIV challenge on DoD CAC cards. I did have to ask for the “manager” - but once I did, magic things started to happen. Thank you guys at Thursby - you really came through! This is the best travel solution for DoD email...if you don’t have it, you should. All you need is an iPad Pro and the Thursby CAC reader (The newest iPad with a USB-C is not yet supported, but all lightning connectors are...). I have been using this for several years now and love it.
This is the second time that an “upgrade” has made my iPad/Subrosa combination for DoD email WORTHLESS. They seem to forget that those of us with PIV have special access needs. Bottom line, when you call the tech support, they’re very personable and apologetic - but they can’t do anything for me. So 5.0 took out all CAC Card users with here I sit for weeks at a time without my email solution.

Come on guys. You’re the best solution out there - but things like this are horrendous fails.

Developer Response ,

I apologize for the inconvenience this has caused you. We're looking into why this is happening and how we can get this corrected. I want to reassure you that this issue has our highest priority. If you have not already, please open a call with our support team at so that we can notify you when we have updated information. Please let us know if there is anything we can do for you in the meantime. Thanks, Luke

BPbeans ,

Functional (when it works) but inefficient

It’s hit or miss whether this app actually gets me into my CAC-enabled work email application. When it does, it’s usually functional- I can read emails & basic attachments, reply, forward. But even with excellent cell reception/great WiFi, it often takes about 1-5 minutes to do things that take about 5-10 seconds on my workstation; ex. move an email to a folder, forward an email, navigate to a new email, etc.

Developer Response ,

Thank you for your feedback. Many times functionality will be slowed down due to the server which your mail is hosted. Even if your mail is easily accessible through your desktop, it may be throttled on mobile devices. We rely on feedback from users like you. Should you ever have any additional feedback, please do not hesitate to reach out. Our support team can be reached at +1(817) 478-5070 or Thank you, Luke

Cougar738 ,


Just started to use it again after the up grade and I’d does not work. Will not see my certificates and does not read the card at all. This was the best thing until the up grade. If not fixed I’ll find another system to use instead of this one.

I”be used this since the beginning ing and have love it. I can take it any place but now it will not work.

Developer Response ,

We appreciate your feedback. I am sorry you are having issues with the app. The best way to get these addressed and fixed is to contact our support team. Please contact our support team at or +1(817) 478-5070. We look forward to hearing from you soon. Best, Luke


Thursby Software Systems, Inc.
33.7 MB

Requires iOS 11.0 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 © 2011-2019 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.

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