# Frequencies Free > Radio channel frequency and CTCSS tone code converter for various radio types. (iPhone/iPad app by Jaap Crezee.) - Source: https://appshunter.io/ios/app/frequencies-free/id898884772 (this page in markdown: same URL + `.md`) - Developer: [Jaap Crezee](https://appshunter.io/developer/898884775) - Category: Utilities, Reference - Price: Free - Rating: 3.00/5 from 2 App Store ratings · 2 written reviews indexed - Age rating: 4+ - Requires: iOS 6.0 · 23 MB - Languages: English - Released: 2014-08-07 - Data updated: 2026-07-01 - Monetization: ad-supported - User reviews in markdown: https://appshunter.io/ios/app/frequencies-free/id898884772/reviews.md ## What is Frequencies Free? Find out what the frequency of a specific LPD / LPD 8 / PMR / CB (Citizen Band, 'normal' or UK) / UHF / PRS / FRS/GMRS / KDR / Marine VHF channel is and the CTCSS tone code of a subchannel. Do you have a 2 meter / 70 cm band radio and want to communicate with someone with a Marine VHF / PMR / LPD / CB / UHF / PRS / KDR / FRS/GMRS radio? Is that one also using 'subchannels'? This app is what you need! Select which type you need and select the channel and subchannel. The app calculates / converts the channel. The frequency (in MHz) and CTCSS frequency (in Hz) / tone code are then shown. Or select the frequency (of a channel or subchannel) and the nearest channel will be shown, if it is nearby the given frequency. Select the tab 'frequency' at the bottom of the app to make use of this functionality. Possible types: - PMR - KDR - LPD - LPD8 - CB (Citizen Band) - CB UK (Citizen Band UK) - UHF (often used in Australia) - PRS (often used in New Zeeland) - FRS / GMRS - FRS - Marine VHF This is a free version with ads. There is also a paid version of this app without ads. Ads and paid version are just to support the app development and subscription to the stores. Please tell me if you would like to have more features or supported radio types. App icon by icons8.com / iconsdb.com Idea by http://portoshop.nl ## Key features - Find radio channel frequencies - Calculate CTCSS tone codes - Convert frequencies to channels - Supports PMR, CB, Marine VHF, and more - Free version with ads ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/frequencies-free/id898884772/reviews.md ### 5/5 — Best frequency finder *2021-05-24, version 1.7* App radio frequency the best ### 1/5 — Worthless does have instructions? *2019-02-12, version 1.7* It is unfinished or broke ## Frequently asked questions about Frequencies Free ### What radio types does Frequencies Free support? Frequencies Free supports a wide range of radio types including PMR, KDR, LPD, LPD8, CB (Citizen Band), CB UK, UHF, PRS, FRS/GMRS, FRS, and Marine VHF. This allows for broad compatibility for communication needs. ### Can Frequencies Free convert frequencies to channels? Yes, Frequencies Free allows you to select a frequency and it will show you the nearest channel if it is nearby. This functionality is accessible via the 'frequency' tab at the bottom of the app. ### What is the CTCSS tone code? The CTCSS (Continuous Tone-Coded Squelch System) tone code is a subchannel code used in some radio communications to filter out unwanted transmissions. Frequencies Free can help you find the specific CTCSS tone code for a subchannel. ### Is Frequencies Free available on all devices? Frequencies Free is available on iPhone, iPad, and iPod devices. It is designed to work across these Apple platforms. ### How often is Frequencies Free updated? The latest version of Frequencies Free is 1.7, which was last updated on May 12, 2015. Future updates may introduce more features or supported radio types based on user feedback. ### What is the age rating for Frequencies Free? Frequencies Free has an age rating of 4+. This indicates it is suitable for users aged four and older. ### Does Frequencies Free have ads? Yes, this is the free version of Frequencies Free and it contains advertisements. There is a paid version available without ads, which helps support the development of the app. ### What is the user rating for Frequencies Free? Frequencies Free has a rating of 3.0 stars based on 2 user ratings. This feedback helps inform potential users about the app's reception. ## Version history (last 1 release) ### 1.7 — 2015-05-12 This app has been updated by Apple to display the Apple Watch app icon. Added radio type: - KDR Added functionality for reverse lookup: type a frequency or subchannel-frequency and find out if there is a channel nearby with the given frequency. You can find the new functionality when clicking on the 'frequency' tab on the bottom of the screen. Please tell me what functions and / or radio types you need to add to a new version. ## Apps similar to Frequencies Free | App | Rating | Price | Category | | --- | --- | --- | --- | | [CB Radio 2015 (Light)](https://appshunter.io/ios/app/cb-radio-2015-light/id1019004830) | 2.6 (16) | Free | Utilities | | [Walkie Talkie CB](https://appshunter.io/ios/app/walkie-talkie-cb/id645561386) | 2.5 (65) | Free | Utilities | | [SmartSDR™ - FlexRadio Systems®](https://appshunter.io/ios/app/smartsdr-flexradio-systems/id1089157289) | 4.2 (129) | $79.99 | Utilities | | [Wireless Workbench Mobile](https://appshunter.io/ios/app/wireless-workbench-mobile/id849092210) | 4.3 (29) | Free | Utilities | | [Satellite Tracker](https://appshunter.io/ios/app/satellite-tracker/id1438679383) | 3.3 (12) | Free | Utilities | | [Maritime VHF Radio Operator](https://appshunter.io/ios/app/maritime-vhf-radio-operator/id1534423788) | 1.0 (2) | Free | Utilities | ## More apps by Jaap Crezee - [Frequencies](https://appshunter.io/ios/app/frequencies/id898890239) - [Time Tolerance Registration List Free](https://appshunter.io/ios/app/time-tolerance-registration-list-free/id999020370) All apps by Jaap Crezee: https://appshunter.io/developer/898884775 --- *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 2026-07-01.*