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 **
• Subscription based feature allowing PDF and XFA documents to be digitally signed using your smart card
• 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)
• 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 5.1.6

Included Dept. of Treasury cert
Fixed an issue where connecting to some Office 365 environments would fail
Fixed issues in Calendaring where displaying another calendar would result in a sync error and the current date wasn't highlighted in Month view

Ratings and Reviews

2.9 out of 5
92 Ratings

92 Ratings

Mir1110 ,

Microsoft Teams doesn’t work

Army 365 finally works in Sub Rosa for most of the Microsoft apps except for Microsoft Teams. When accessing Teams, it will just sit at a black loading screen and the address bar says “initializing”and nothing ever loads. On iPadOS browser apps, you have to turn off “Prevent Cross-site Tracking” and select “request desktop site” for teams to work in the Chrome app in iPadOS. I’m not sure if this is the reason why we can’t access teams in the sub Rosa app or not. I don't see the options in Sub Rosa to make these changes like I can in the other browser apps so maybe that is part of the issue. Maybe they don’t allow these options for security reasons but I would give the Sub Rosa app 5 stars if they could get Microsoft Teams to work in their app.

Caleb L6 ,

Used this for 4 months now, here’s my feedback.

As a commander I’ve been looking for ways to work around the laptop tied to VPN. Thought this $100 solution for the browser and the hardware was worth it. BEWARE cost of ownership is greater than the initial sticker price.

BLUF: If you have extra money laying around, go for it. Otherwise there are ways to access the same content but better and saving yourself the money. It matters if you care about carrying a 16oz iPad or a 3.4lb laptop.

After 4 months, I realized this is just a glorified way to read OWA emails. Access to share points, DCS conference, and other NIPR-work sites are not fully compatible. Part of this is due to iOS and Adobe Flash, other times it’s because the Sub Rosa browser just fails to load. On top of that, dev wants money by charging a monthly/annual subscription to sign PDFs in their app. The most basic of work tasks usually required. I can do this on my MacBook for free or my work laptop for free. Why bother giving these devs more money after initial purchase? Cost doesn’t outweigh the benefits. The only irreplaceable feature with this is that I can read encrypted emails on the go so if I really care about blotters or PII then this is single feature is what makes this app worth it.

Before you use this app or purchase the hardware look up workarounds on popular websites to achieve the same end state.

Developer Response ,

Thank you for reaching out. I am sorry that you are not completely satisfied with our Sub Rosa solution. We would be happy to look into the issues you are facing. If reaching particular websites would add more value to your purchase, please reach out to our support team at or (817) 478-5070 so that we can look into this for you.

All of our support is done at no additional cost by our team in Arlington, TX. We can address most issues in under 15 minutes. At this time, not all government sites are optimized for iOS and Android and this would therefore be out of our control. Please keep in mind, mobile devices do not support Java or Flash. If a website requires either of those you will not be able to access these due to mobile restrictions on Apple & Android.

Our newest feature, PDF signing/editing, required a significant amount of development, more so than the typically free updates that continue to expand support and maintain the application. Due to this new development, the decision was made to roll PDF signing/editing into Sub Rosa and not as a separate app purchase. This was done for the convenience of all Sub Rosa users across all Sub Rosa products.

In the end, we really want you to enjoy the solution and get the most from it so please contact our support team so they can assist you in accomplishing more than you are today. Should you feel that our solution is not worth your one-time cost, please reach out to and we would be happy to process a refund for you. Thank you for being a Thursby customer. Best, Luke

Delarris ,

Customer Service Top Notch

I check my email daily with the laptop but I hate pulling it out and setting it up. So I thought this would be more convenient and easier, and it was initially. I started having issues with my reader not reading my CAC and receiving errors, so I did my research first to attempt to fix the issues. After I tried everything, I contacted tech support and Kim replied immediately and kept consistent contact attempting to fix the issue over about 3-4 days. Once we tried everything she transferred me to Luke in Sales and he sent me out a replacement and free label and package to send back my old reader. Again, their customer services was excellent and extremely responsive to my needs!!!

Developer Response ,

We greatly appreciate your feedback! Should you ever need anything, please do not hesitate to reach out to us. -- Carl Ketterling, Director Customer Support

App Privacy

The developer, Thursby Software Systems (TSS), Inc., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Linked to You

The following data may be collected and linked to your identity:

  • Contact Info
  • Identifiers

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

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

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