# 21 CFR Part 211 Guide vs FAX from iPhone The clearest difference is price: FAX from iPhone at Free against 21 CFR Part 211 Guide's $9.99. FAX from iPhone also leads on update cadence (every 5 weeks vs every 21 months) and chart position (#90 vs unranked). 21 CFR Part 211 Guide's advantage is in-app purchases (none vs 20) and ads (none vs shown). On device support and iOS requirement there is nothing between them. FAX from iPhone is free to download; 21 CFR Part 211 Guide costs $9.99 up front. FAX from iPhone sells 19 in-app purchases, starting at $7.99 per 7 days. 21 CFR Part 211 Guide asks for nothing beyond the download. 21 CFR Part 211 Guide ships an update every 21 months, FAX from iPhone every 5 weeks. The most recent releases landed on October 26, 2026 and October 30, 2026 respectively. ## The numbers | Metric | 21 CFR Part 211 Guide | FAX from iPhone | | --- | --- | --- | | Price | $9.99 | **Free** | | Rating | — | **[4.5 (7K ratings)](https://appshunter.io/ios/app/fax-from-iphone-fax-app/id1563922708/reviews)** | | Number of ratings | — | **7K** | | Positive reviews | — | 25.6% of reviews | | In-app purchases | **No** | Yes | | Ads | **No** | Yes | | Update frequency | Every 21 months | **Every 5 weeks** | | Monetization | — | Free with in-app purchases | | Best chart rank | — | **#90** | | Size | 3 MB | 134 MB | | Requires iOS | 17.6 | **16.0** | | Devices | iPhone | iPhone | | Age rating | 4+ | 4+ | | Developer | [Cimcon Software, Inc.](https://appshunter.io/developer/596722626) | [DevMeApp LLC](https://appshunter.io/developer/1758961458) | ## What reviewers say ### 21 CFR Part 211 Guide [App page](https://appshunter.io/ios/app/21-cfr-part-211-guide/id1314903843) **Features:** macOS Compatibility **In-app purchases:** none ### FAX from iPhone [App page](https://appshunter.io/ios/app/fax-from-iphone-fax-app/id1563922708) **Currently charting:** #90 Top Grossing · Business (US App Store) Send and receive faxes directly from your iPhone. This app transforms your device into a portable fax machine, allowing you to scan documents, attach files, and send them worldwide. It offers features like tracking, electronic signatures, and secure transmission. **Highlights:** Advanced document scanner, Support for multiple file formats, Fax status tracking, Electronic signature feature, Convenient file import, Fast fax sending with saved numbers **Features:** macOS Compatibility, Vision Pro support **In-app purchases (19)** | Purchase | Price | Billing | | --- | --- | --- | | Unlimited fax sending (1 week) | $7.99 | per 7 days | | Fax number US (1 week) | $7.99 | per 7 days | | Fax number Canada (1 week) | $7.99 | per 7 days | | Unlimited fax sending (1 week) | $7.99 | per 7 days | | Fax number Canada (1 week) | $7.99 | per 7 days | | Fax number US (1 week) | $7.99 | per 7 days | | Unlimited fax sending (1 week) | $9.99 | per 7 days | | Unlimited Send & Receive | $9.99 | per 7 days | | Unlimited fax send and receive | $9.99 | per 7 days | | Unlimited Send & Receive | $11.99 | per 7 days | | Week | $11.99 | per 7 days | | Fax number US (1 month) | $14.99 | per month | | Unlimited Send & Receive Fax | $14.99 | per 7 days | | Unlimited fax sending (Annual) | $19.99 | per year | | Unlimited fax sending (Month) | $19.99 | per month | | Unlimited fax sending (Month) | $29.99 | per month | | Unlimited Send & Receive | $29.99 | per month | | Unlimited fax sending (Annual) | $39.99 | per year | | Unlimited fax sending (Annual) | $49.99 | per year | **What reviewers like** - 🚀 Fast and efficient - 💡 Convenient for sending faxes - 👍 User-friendly interface **What reviewers complain about** - 🐛 Faxes not received or unreadable - 💰 Deceptive pricing and hidden fees - 🔒 Poor customer support and communication - 🔋 Unreliable service and frequent failures **Reported bugs** - Faxes failing to send or receive - App freezing or crashing during use - Incorrect billing and charging issues **Requested features** - Option to pay per fax instead of subscription - Improved fax quality and reliability - Better customer support channels ## Frequently asked questions ### Is 21 CFR Part 211 Guide free? 21 CFR Part 211 Guide costs $9.99, with no in-app purchases. ### Is FAX from iPhone free? FAX from iPhone is free to download, with in-app purchases available. ### Do 21 CFR Part 211 Guide or FAX from iPhone have ads? FAX from iPhone shows ads; 21 CFR Part 211 Guide does not. ### Which is updated more often, 21 CFR Part 211 Guide or FAX from iPhone? 21 CFR Part 211 Guide ships an update every 21 months, and FAX from iPhone every 5 weeks. Most recently, 21 CFR Part 211 Guide was updated on October 26, 2026 and FAX from iPhone on October 30, 2026. --- *Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*