# Signal Flags International > Reference guide for international signal flags with usage details and quiz. (iPhone/iPad app by Gigs, Inc..) - Source: https://appshunter.io/ios/app/signal-flags-international/id358894266 (this page in markdown: same URL + `.md`) - Developer: [Gigs, Inc.](https://appshunter.io/developer/355677483) - Category: Reference, Education - Price: $2.99 with in-app purchases - Age rating: 4+ - Requires: iOS 15.5 · 39 MB - Languages: American English - Released: 2010-03-01 - Data updated: 2026-08-29 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/signal-flags-international/id358894266/reviews.md ## What is Signal Flags International? The Signal Flags International app contains images of all (40) of the international code flags, along with detailed usage descriptions for each flag . The app is designed to be used as an authoritative and expandable reference tool for recognition of the flags and interpretation of their meanings when displayed by merchant ships, warships, fishing vessels and private yachts: • Scrolling views provide quick access to flag images/IDs • Disclosure info for each flag gives detailed info on usage in both International Code and U.S. Navy/Allied signal contexts • Quiz functionality is included to aid in memorizing the flags for quick recognition. • A complete current version of the International Code of Signals (NIMA pub. 102) document is included for ready reference, with in-document hyperlinks (in text, TOC, and indexes), and search capability via a search bar. • A document navigation toolbar for quick access to search results, hyperlinks and document paging. • Feature set is expandable via in-App purchasing to include 36 additional flags, the USCG Navigation Rules document, the USCG Nav Aids booklet, and the NATO MTP-1(D) vol. II document. •Signal Flags International is fully self contained, does not require active network communication (except for the in-app purchasing process), and is ready to use anywhere at anytime. ## Key features - 40 international code flag images - Detailed usage descriptions - Quiz for memorization - Full International Code of Signals document - Expandable feature set via in-app purchases ## Pricing and in-app purchases Base price: $2.99. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Additional flags | $0.99 | one-time | | USCG Navigation Rules Document | $0.99 | one-time | | MTP 1(D), Vol. II (UNCLASS) | $2.99 | one-time | | USCG Navigation Aids booklet | $0.99 | one-time | ## Recent user reviews (4 of 4) All indexed reviews: https://appshunter.io/ios/app/signal-flags-international/id358894266/reviews.md ### 1/5 — Don't buy *2014-09-29* When you change pages the App exits. Not worth it. **Developer response:** Well, we have not seen this behavior, and nobody else has complained about it in the last 8 years. ### 5/5 — Good app for reference, nice update. *2010-07-14* Just updated from earlier version, quiz function is a nice addition! Works well, and use it weekly when sailing San Diego bay. ### 5/5 — Great app for learning the flags *2010-07-13* I was looking for an app to learn the signal flags, liked the free version, and noticed this one has a quiz function. Works great! Much more info on the individual flags as well. ### 4/5 — Handy app for a beginner or quick reference *2010-06-08* It contains a good deal of valuable info. I would have liked to see more for the price, but when version 1.1 comes out shortly (containing the quiz feature), it will be really good. I recommend the full version if you really want to get into flag use or interpretation - it has more US Navy/Allied forces flags. As far as support goes, Apple posted the description for v1.1 before actually posting the update, and the Gigs, Inc. employee I contacted about missing features was quite helpful. ## Frequently asked questions about Signal Flags International ### What is Signal Flags International? Signal Flags International is a reference app that provides images and detailed usage descriptions for all 40 international code flags. It also includes a quiz to help users memorize them and the full International Code of Signals document. ### Does Signal Flags International have ads? No, Signal Flags International is ad-free. It does not contain advertisements, allowing for an uninterrupted user experience. ### What additional content can be purchased in Signal Flags International? Users can expand the app's features by purchasing 36 additional flags, the USCG Navigation Rules document, the USCG Nav Aids booklet, and the NATO MTP-1(D) vol. II document. ### Can Signal Flags International be used offline? Yes, Signal Flags International is fully self-contained and does not require an active network connection, except for the in-app purchasing process. It can be used anywhere at any time. ### What devices does Signal Flags International support? Signal Flags International is available for iPhone and iPod devices. It is rated for ages 4 and up. ### How often is Signal Flags International updated? The latest version of Signal Flags International is 4.2, which was last updated on September 3, 2022. Updates typically include new features, bug fixes, and content improvements. ### What is the price of Signal Flags International? Signal Flags International is available for a one-time purchase of $2.99. This price grants access to the core features of the app. ### What is the International Code of Signals included in the app? The app includes a complete current version of the International Code of Signals (NIMA pub. 102) document. It features in-document hyperlinks, a table of contents, indexes, and a search bar for easy navigation and information retrieval. ## Version history (last 5 releases) ### 4.2 — 2022-09-03 Bug fix and update for iOS 15 ### 4.1 — 2020-10-08 • iOS 14 functionality • Enhanced Quiz UI • Bug fix for quiz ### 4.0 — 2020-09-04 • Bug fixes for in-app purchasing * UI changes, including dark mode support for iOS 13.5 and newer • Added search capability to all documents • Added a configurable timer to Quiz functionality • Made USCG Nav. Aids document available for purchase • Added the complete MTP-1(D), vol. II document (available for purchase) ### 3.0 — 2019-06-29 • Updates for iOS 12 • UI changes to support all iPhone device types • Flag usage information revisions to include content from MTP 1(D) Volume II Multinational Maritime Tactical Signal and Maneuvering Book, as updated by Change 1 on 10/18/ 2004 ### 2.2 — 2016-05-05 Updates for iOS 9.3 Bugfix for Y flag detail view ## Apps similar to Signal Flags International | App | Rating | Price | Category | | --- | --- | --- | --- | | [北京版小学英语-学生最新同步点读口语专家](https://appshunter.io/ios/app/id1616159800) | 4.0 (4) | Free | Reference | | [Catholic Jerusalem Bible+Audio](https://appshunter.io/ios/app/catholic-jerusalem-bible-plus-audio/id1605531940) | 4.4 (31) | Free | Reference | | [Angelology](https://appshunter.io/ios/app/angelology/id1607575000) | 5.0 (4) | Free | Reference | | [一沐考编考编库事业单位ABCDE类-2023最新版](https://appshunter.io/ios/app/abcde-2023/id1621671540) | — | Free | Reference | | [Telugu Bible + Audio Mp3](https://appshunter.io/ios/app/telugu-bible-plus-audio-mp3/id1606887420) | 4.4 (19) | Free | Reference | | [Women Indonesian Bible + Audio](https://appshunter.io/ios/app/women-indonesian-bible-plus-audio/id1606893280) | 5.0 (1) | Free | Reference | ## More apps by Gigs, Inc. - [Signal Flags](https://appshunter.io/ios/app/signal-flags/id355677480) - [Signal Flags Info](https://appshunter.io/ios/app/signal-flags-info/id359067232) - [Sleep Monitor](https://appshunter.io/ios/app/sleep-monitor/id516856134) - [Signal Flags Communicator](https://appshunter.io/ios/app/signal-flags-communicator/id911267963) All apps by Gigs, Inc.: https://appshunter.io/developer/355677483 --- *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 2026-08-29.*