# CFR AI - Title 40 — EPA Assistant > AI-powered assistant for understanding environmental protection regulations (Title 40 CFR). (iPhone/iPad app by Ryan Smerdon.) - Source: https://appshunter.io/ios/app/cfr-ai-title-40/id6499383417 (this page in markdown: same URL + `.md`) - Developer: [Ryan Smerdon](https://appshunter.io/developer/1732547078) - Category: Reference, Business - Price: Free with in-app purchases - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 26.0 · 13 MB - Languages: American English - Released: 2024-05-16 - Data updated: 2026-08-31 - Monetization: subscription - User reviews in markdown: https://appshunter.io/ios/app/cfr-ai-title-40/id6499383417/reviews.md ## What is CFR AI? CFR AI - Title 40 is built for people who need a focused, modern workspace for Code of Federal Regulations Title 40 research and organization. Ask questions about Title 40 and get AI-assisted responses designed around current eCFR source material, citations, and a clear trust layer. The app also gives you a productivity hub for saved answers, deadlines, reminders, notes, and title-specific follow-up work. Key features: Live Title 40 CFR Chat Ask natural-language questions about Protection of Environment and receive structured AI responses with citation-oriented source context from current eCFR data. eCFR Trust Layer Responses are designed to highlight cited CFR sections, source context, and professional-use reminders so users understand what should be verified before relying on an answer. CFR Change Monitor Track Title 40 update context, recent amendment dates, saved sections, and CFR follow-up work. Citation Builder Build and save CFR references for research, case notes, follow-ups, and professional documentation. Compare Versions Compare CFR section text across available eCFR dates to better understand how regulations have changed over time. Environment Organizer Track CFR-related questions, review steps, target dates, statuses, and follow-up items for environment work. Advanced Calendar Use an iOS-style calendar workspace with month, week, day, and agenda views for review blocks, appointments, deadlines, and saved chat answers. Reminders Create organized reminder lists with due dates, notes, priorities, tags, flagged items, scheduled items, and CFR follow-ups. Notes Save research notes, AI answers, citations, checklists, tags, folders, and longer CFR notes without losing important context. AI Action Buttons Save useful chatbot responses into calendar items, reminders, notes, and organizer workflows so research can turn into action. Important notice: CFR AI - Title 40 is an independent productivity and research tool. It is not affiliated with, endorsed by, or sponsored by the U.S. government, eCFR, or the Office of the Federal Register. The eCFR is continuously updated but is not the official legal edition of the CFR. AI responses should be reviewed against cited source material and should not be treated as legal, medical, benefits, or professional advice. Subscription required: Access to app features requires an active subscription. Subscriptions are managed through your Apple account and can be canceled in App Store account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ ## Key features - AI-powered GPT-4o assistance - Instant answers on environmental regulations - Interactive AI chatbot - Notes and calendar features - User-friendly interface - Compliance guidance ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | CFR AI - EPA Weekly | $0.99 | per 7 days | | CFR AI - EPA - Monthly | $3.99 | per month | | CFR AI - EPA Bi-Annual | $23.99 | per 6 months | | CFR AI - EPA Annual | $45.99 | per year | ## Frequently asked questions about CFR AI ### What is CFR AI - Title 40? CFR AI - Title 40 is an AI-powered application designed to help users understand and navigate Title 40 of the Code of Federal Regulations, which pertains to environmental protection. It offers instant answers and interactive chat features powered by GPT-4o. ### What are the subscription options for CFR AI - Title 40? CFR AI - Title 40 offers several subscription plans: a weekly plan for $0.99, a monthly plan for $3.99, a bi-annual plan for $23.99, and an annual plan for $45.99. All plans include a 3-day free trial. ### What AI technology powers CFR AI - Title 40? CFR AI - Title 40 is powered by GPT-4o, one of the most advanced AI technologies available, ensuring accurate and sophisticated guidance on environmental regulations. ### Can I use CFR AI - Title 40 offline? The provided information does not specify offline functionality. As an AI-powered tool requiring access to current information and advanced models, it is likely that an internet connection is necessary for full functionality. ### How often is CFR AI - Title 40 updated? The app was last updated on February 4, 2026, indicating a recent update. However, the frequency of future updates is not explicitly stated, though typically such reference tools are updated to reflect regulatory changes. ### What devices does CFR AI - Title 40 support? CFR AI - Title 40 is available on macOS, iPhone, iPad, and iPod, making it accessible across various Apple devices for users on the go. ### What is the age rating for CFR AI - Title 40? CFR AI - Title 40 has an age rating of 4+, making it suitable for a wide range of users. This rating suggests it contains no mature content. ### Does CFR AI - Title 40 have ads? No, CFR AI - Title 40 does not contain advertisements. The application operates on a subscription model, ensuring an ad-free experience for its users. ## Version history (last 5 releases) ### 5.1 — 2026-08-20 Major redesign with a modern red, white, and blue interface, live eCFR-focused Title 40 chat, StoreKit subscription paywall, citation builder, version comparison, CFR change monitoring, Environment Organizer, advanced calendar, reminders, notes, and improved save actions for complete AI responses. ### 4.1.1 — 2026-02-04 New UI Now pulls live from eCFR ### 3.0.1 — 2024-12-29 Bug Fixes ### 3.0.0 — 2024-09-16 Complete overhaul to the code Now smoother and faster. Added Note,Calendar & Reminders We didn't just squash some bugs, we annihilated them! ### 2.2 — 2024-07-30 Added onboarding screen fixed launch screen logo ## More apps by Ryan Smerdon - [CFR AI - Title 21](https://appshunter.io/ios/app/cfr-ai-title-21/id6478321436) - [CFR AI - Title 49](https://appshunter.io/ios/app/cfr-ai-title-49/id6502741519) - [CFR AI - Title 29](https://appshunter.io/ios/app/cfr-ai-title-29/id6502909696) - [CFR AI - Title 12](https://appshunter.io/ios/app/cfr-ai-title-12/id6503028452) - [CFR AI - Title 26](https://appshunter.io/ios/app/cfr-ai-title-26/id6503179367) All apps by Ryan Smerdon: https://appshunter.io/developer/1732547078 --- *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 2026-08-31.*