# 40 CFR - Protection of Environment (LawStack Ser.)

> Offline access to Title 40 CFR, Protection of Environment regulations. (iPhone/iPad app by Tekk Innovations LLC.)

- Source: https://appshunter.io/ios/app/40-cfr-protection-of-environment-lawstack-ser/id325701983 (this page in markdown: same URL + `.md`)
- Developer: [Tekk Innovations LLC](https://appshunter.io/developer/320464672)
- Category: Reference, Business
- Price: Free with in-app purchases
- Rating: 2.30/5 from 3 App Store ratings · 9 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.0 · 388 MB
- Languages: American English
- Released: 2009-08-13
- Data updated: 2026-06-11
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/40-cfr-protection-of-environment-lawstack-ser/id325701983/reviews.md

## What is 40 CFR?

LawStack's complete Title 40 Code of Federal Regulations (CFR), Protection of Environment. Leave the heavy books at home and buy this app now.

This includes federal regulations administered by the Environmental Protection Agency (EPA).

• Free trial. Renew thereafter via in-app purchase.
• Complete offline access.
• All tables and images included.
• Add custom bookmarks, highlighting, and notes.
• Full-text search and other advanced search options.
• Email and share sections or selected content with colleagues.

Question, comments, or feature requests? Need specific updates? Email us at support@lawstack.com.

************************************

Disclaimer: The information in this app is not intended to replace official versions, is subject to revision, and should not be considered legal advice. Tekk Innovations LLC presents this information without warranties, express or implied, regarding accuracy, timeliness, or completeness. In addition, this disclaimer may change at anytime. When necessary, consult primary source material.

## Key features

- Complete Title 40 CFR
- Offline access
- Includes tables and images
- Custom bookmarks, highlighting, notes
- Full-text and advanced search
- Share sections via email

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 40 CFR - 3 Months | $14.99 | one-time |
| 40 CFR - 1 Year | $99.99 | one-time |


## Recent user reviews (9 of 9)

All indexed reviews: https://appshunter.io/ios/app/40-cfr-protection-of-environment-lawstack-ser/id325701983/reviews.md

### 2/5 — So when did this annual subscription requirement start?

*2016-03-19*

I have had this App since 2011 and they are now telling me that my subscription has expired?? This was not stipulated when I first purchased this app!!! This is totally a bait and switch.

**Developer response:** Hi Johnells, Thanks for your review and I'm sorry for the confusion. Where did you get the information that it does not expire? Like any other apps, we do not offer lifetime subscription. Would you mind writing me an email to support@lawstack.com? I would love to speak with you personally and perhaps we could do something about your subscription.

### 5/5 — Great app!

*2013-05-22*

Perfect for anyone who uses the CFR on a regular or occasional basis.  The search function is great and the ability to email citations makes this even better.

Love that I don't have to be connected for it to work and that it is updated with reg changes.

**Developer response:** Hi Wy050607,  thanks for your review. We are happy that you enjoy the app. Currently, we have all the CFR software updates and improvements in our flagship app "LawStack". You can find it on AppStore. Please download it and access 40 CFR there for the best experience. Thanks again!

### 5/5 — Great app

*2013-05-04*

One of the few apps I use almost every day.

**Developer response:** Hi Sienna Point,  thanks for your review. We are happy that you enjoy the app. Currently, we have all the CFR software updates and improvements in our flagship app "LawStack". You can find it on AppStore. Please download it and access 40 CFR there for the best experience. Thanks again!

### 5/5 — Great App

*2013-04-12*

As an environmental engineer, I deal with the federal regulations on nearly a daily basis and this App is very useful and user friendly way to quickly check out the regs.  I also like the search function.  I highly recommend it if you deal a lot with the CFR.

**Developer response:** Hi GraceSneakers, thanks for your review. We are happy that you enjoy the app. Currently, we have all the CFR software updates and improvements in our flagship app "LawStack". You can find it on AppStore. Please download it and access 40 CFR there for the best experience. Thanks again!

### 5/5 — Love it

*2013-03-03*

Thanks for continuing to improve and update this app!

**Developer response:** Hi enolmron,  thanks for your review. We are happy that you enjoy the app. Currently, we have all the CFR software updates and improvements in our flagship app "LawStack". You can find it on AppStore. Please download it and access 40 CFR there for the best experience. Thanks again!

### 4/5 — Quite useful, but needs text highlighting!

*2012-07-18*

4 stars with the ability to highlight blocks of text, 5 for offering multiple highlight colors.  I work in the hazardous waste industry, and the ability to highlight text would be a boon to my training presentations.  Also, the ability to add annotations, and edit your bookmarks by changing the order in which they are listed by dragging them to a new location in the list.  When I return to a chapter and add a bookmark, it currently appears at the bottom of the list.  I want to drag it into chapter order.

**Developer response:** Hi mistrrhappy,  thanks for your review. We are happy that you enjoy the app. Currently, we have all the CFR software updates and improvements in our flagship app "LawStack". You can find it on AppStore. Please download it and access 40 CFR there for the best experience. Thanks again!

### 5/5 — Outstanding app

*2012-05-14*

Hands down one of the best apps, if not the best, out there for environmental regulations.  
Some of the benefits:
1.  Useful and customizable search function that works.
2.  Frequent and clearly defined updates to keep up with the regulatory changes.
3.  E-mail from within a citation for reference now or later.
4.  Customer/technical service that responds to concerns and follows up on errors/omissions.
5.  Value for the money.
6.  Works off-line.  Once installed, no need to stay connected for searching.

Available for most CFRs.

**Developer response:** Hi there!  thanks so much for your review! We are happy that you enjoy the app. Currently, we have all the CFR software updates and improvements in our flagship app "LawStack". You can find it on AppStore. Please download it and access 40 CFR there for the best experience. Thanks again!

### 5/5 — Great app...

*2010-01-13*

I work for EH&S. Like that app.., helps on the go!

### 4/5 — Great App!

*2009-10-15*

I work for the EPA and find this app handy on the go. Rather than carrying the book version of 40 CFR I just pull up the regulations on my iPhone.

## Frequently asked questions about 40 CFR

### Does 40 CFR have ads?

No, 40 CFR does not contain advertisements. The app is free to download and offers an in-app purchase for renewal after a free trial.

### What is the rating for 40 CFR?

40 CFR has a rating of 2.3 stars based on 3 user ratings.

### How often is 40 CFR updated?

The latest version of 40 CFR was released on July 28, 2017, with version 8.605.20170723.

### What devices support 40 CFR?

40 CFR is supported on iPhone, iPad, and iPod devices.

### What is the age rating for 40 CFR?

The app has an age rating of 4+.

### Can I use 40 CFR offline?

Yes, 40 CFR offers complete offline access to all its content, including tables and images.

### How do I purchase 40 CFR?

40 CFR is free to download and includes a free trial. Renewal is handled via an in-app purchase.

### Is the information in 40 CFR legally binding?

The app's disclaimer states that the information is not intended to replace official versions, is subject to revision, and should not be considered legal advice. Users should consult primary source material when necessary.

## Version history (last 5 releases)

### 8.605.20170723 — 2017-07-28

This app has been updated by Apple to display the Apple Watch app icon.

Free trial for new users.

### 8.508.20161030 — 2016-10-31

Thank you for supporting LawStack apps. This update fixes a database migration bug.

### 8.507.20161023 — 2016-10-27

Thank you for supporting LawStack apps. This update includes bug fixes and UI improvements.

### 8.307.20160327 — 2016-04-06

Bug fixes and UI tweaks.

### 8.302.20160214 — 2016-02-20

Tab bar and in-app content updates upgrades.

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*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 2026-06-11.*