# DOCS II — Digital Opacity Compliance > Automates visible emission observations for air quality compliance and reporting. (iPhone/iPad app by Virtual Technology LLC.) - Source: https://appshunter.io/ios/app/docs-ii/id1546600318 (this page in markdown: same URL + `.md`) - Developer: [Virtual Technology LLC](https://appshunter.io/developer/1546600320) - Category: Utilities, Reference - Price: Free - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 15.0 · 91 MB - Released: 2021-06-16 - Data updated: 2026-07-07 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/docs-ii/id1546600318/reviews.md ## What is DOCS II? DOCS II is developed by Virtual Technology, LLC, located in Rio Rico, Arizona. Air Quality has been driven by Opacity Emission standards since the 1800s, with Opacity percentages used to determine airflow requirements for various coal-fired boilers. Every locality in the USA has a standing Visible Emission Opacity limit of no more than 40% Opacity over any six minutes. Visible Emission Standards lowering this opacity limit to 20% / 5% / Zero are not uncommon in the USA, with enforcement of air pollution regulations at the federal, state, and local levels. Failure to adhere to these regulations is very costly, as violations of opacity limits can result in fines of $25,000 per source per day. The most common methods to monitor opacity levels are EPA Method 9, EPA Alternative Method 082, ASTM D7520-16, Digital Camera Opacity Technique, using EPA Method 22. The methods are a visible emission indicator of smoke or no smoke, followed by a Visible Emission Observation (VEO) to determine Opacity. A Visible Emissions Manager completely automates the entire capture of information needed for a Visible Emission Observation. Using Google Maps, compass, inclinometers, distance calculations, online weather, and sun angle data, the VEO is documented with populated data. With the local data captured, the VEO is uploaded to the Virtual Technology LLC servers, and a completed VEO report is generated to create the compliance archive. Nuisance ‘visible’ emissions accounted for over 85% of Air Quality complaints until today are still monitored exclusively by the highly subjective human observation method 9. Visible Emissions Manager is the solution for measuring Opacity and managing complaints of Nuisance Visible Emissions and regulated sources. ## Key features - Automated Visible Emission Observation (VEO) capture - Integration with Google Maps, compass, and inclinometers - Real-time weather and sun angle data - Opacity level documentation - Automated VEO report generation - Compliance archive creation ## Frequently asked questions about DOCS II ### What is DOCS II used for? DOCS II is used to automate the capture of information needed for a Visible Emission Observation (VEO). It helps document opacity levels and generate compliance reports for air quality regulations. ### How does DOCS II help with air quality compliance? By accurately documenting opacity levels and generating compliance archives, DOCS II helps users adhere to visible emission standards, preventing potential fines of $25,000 per source per day. ### What data does DOCS II collect for VEOs? DOCS II collects local data including Google Maps location, compass readings, inclinometer data, distance calculations, online weather, and sun angle data to document opacity levels. ### Is DOCS II available on multiple devices? Yes, DOCS II is available for iPhone, iPad, and iPod devices, allowing for flexible use in the field. ### How often is DOCS II updated? The latest version of DOCS II is 1.5, and it was last updated on April 4, 2026. This indicates a commitment to ongoing development and improvements. ### What is the user rating for DOCS II? DOCS II has a perfect rating of 5.0 stars based on 1 rating, suggesting a highly positive user experience among its current users. ### Does DOCS II have ads? No, DOCS II does not contain advertisements, providing an uninterrupted user experience for compliance monitoring. ### What is the age rating for DOCS II? DOCS II has an age rating of 4+, making it suitable for a wide range of users who need to manage air quality compliance. ## Version history (last 2 releases) ### 1.5 — 2026-04-04 What’s new • Major update migrating the app to a modern platform • Improved performance and stability • Updated user interface and navigation • Improved media capture and review experience • Bug fixes and reliability improvements • Application has been modernized to improve long‑term support • Performance and reliability improvements across the app ### 1.0 — 2021-06-16 No release notes. ## Apps similar to DOCS II | App | Rating | Price | Category | | --- | --- | --- | --- | | [TBM 910 Interior](https://appshunter.io/ios/app/tbm-910-interior/id869415980) | 5.0 (2) | Free | Utilities | | [i Sound Level Meter](https://appshunter.io/ios/app/i-sound-level-meter/id912170360) | 4.5 (33) | Free | Utilities | | [Send Smart](https://appshunter.io/ios/app/send-smart/id912763740) | 2.2 (10) | Free | Utilities | | [句子迷](https://appshunter.io/ios/app/id884715640) | 3.9 (8) | Free | Utilities | | [Meck Sheriff](https://appshunter.io/ios/app/meck-sheriff/id917682360) | — | Free | Utilities | | [mDNS Utility](https://appshunter.io/ios/app/mdns-utility/id918208340) | 1.6 (5) | $0.99 | Utilities | --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-07.*