# MHz — Frequency Finder

> Global wireless microphone frequency and regulation finder for professionals. (iPhone/iPad app by Jakup Andrias Knudsen.)

- Source: https://appshunter.io/ios/app/mhz/id1330607911 (this page in markdown: same URL + `.md`)
- Developer: [Jakup Andrias Knudsen](https://appshunter.io/developer/1330607910)
- Category: Business, Utilities
- Price: $2.99
- Age rating: 4+
- Requires: iOS 17.0 · 13 MB
- Languages: American English, Danish, Swedish
- Released: 2018-03-01
- Data updated: 2026-09-02
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/mhz/id1330607911/reviews.md

## What is MHz?

MHz — wireless frequency coordination that travels with you.

Whether you're mixing monitors on a world tour or setting up two handhelds in a school hall, MHz helps you find clean, legal frequencies for wireless microphones and in-ear monitors — anywhere, even offline.

Find clean spectrum, anywhere
Location-aware lookups show you which TV channels and white spaces are actually free where you're standing. In the United States, United Kingdom, Canada, and Australia, the full transmitter database is bundled into the app — no signal required. In Denmark, Sweden, Norway, and Finland, MHz queries the national regulators' own live frequency services for the most current picture, and regulation summaries for 40+ more countries are always available offline.

Talk to your gear.
Link MHz directly to Shure and Sennheiser hardware on your network. See live RF and battery status, push frequencies to your receivers, or pull their settings into your show file — per channel or a whole group at once.

Collaborate with your crew.
Share frequency groups with other MHz users via iCloud. Everyone sees the same plan, updates arrive with push notifications, and nobody's working from an outdated spreadsheet.

Import and export freely.
Bring in coordination files from Wireless Workbench and Soundbase, merge them into your groups, and export frequency ranges back out. MHz plays nicely with the tools you already use.

Actually understand RF.
The built-in Intermod Tool teaches you intermodulation from first principles — interactive chapters plus a playground where you drag transmitters around a virtual stage and watch the spectrum react. Great for students, ATDs, and anyone who's ever asked "why does channel 3 drop out when channel 5 keys up?"

No accounts, no subscriptions to your own data — your coordination lives in your iCloud.

## Key features

- Worldwide frequency regulations
- Country-specific overviews
- Location-based white-space frequency checks
- GPS integration for precise location
- Search function for specific locations
- Planning tool for tours

## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/mhz/id1330607911/reviews.md

### 1/5 — quits immediately

*2024-10-19*

horrible app. quits immediately. support website doesn’t work. don’t waste your 99 cents

**Developer response:** Can’t argue with any of that — v1 crashing on launch was less a bug and more a personality trait. We didn’t patch it, we replaced it. v2 is a ground-up rebuild that actually opens and stays open. If the support link still 404s on you, reply here directly and we’ll fix you personally, out of spite for our old website.

### 1/5 — Doesn’t do anything.

*2024-05-25*

Can’t get any frequencies in the US. It used to work, but not anymore.

**Developer response:** You’re right, and that one’s genuinely not on you. v1’s US frequency data came from a third-party database, and that provider quietly went out of business — taking US search down with it without us changing a single line of code. Great business model for them, less great for you. v2 rebuilds US coverage in-house as part of a proper 60+ country database, so it’s back, and it’s no longer riding on some other company’s server staying online.

### 1/5 — Did not work at all for also!!!

*2022-08-17*

I tried using this app to search for open wireless frequencies in Los Angeles for my Sennheiser G4 wireless mic systems and could not get it to work at all. It kept telling me to input a specific address and then search. When I did enter a address still nothing productive happens with this app. I know it’s only $.99cents but to me I feel ripped off. THIS APP IS A DUD!!!

**Developer response:** Sorry about this one — v1’s US frequency data came from a third-party database that had already gone out of business by the time you tried this, so the address box was asking for details it had nowhere left to send. Not a great experience, and not a great look for us for depending on it in the first place. v2 replaces that pipeline entirely with native coverage across 60+ countries, so Los Angeles is back on the map — literally.

### 1/5 — Did not work at all for me

*2021-04-05*

Trying to find anything in my area using the map gave only error messages. We are in a well known and popular city.

**Developer response:** The map wasn’t broken, exactly — it was faithfully querying a US data source that had already shut down, which from where you’re sitting is a distinction without a difference. v2 rebuilds that coverage in-house across 60+ countries instead of leaning on a single external vendor’s continued existence. Update and your city should show up properly now.

### 1/5 — Lucy

*2018-11-20*

Useless

## Frequently asked questions about MHz

### What countries does MHz currently support for frequency rules?

MHz provides rules and frequency bands for Austria, Belgium, Denmark, Finland, France, Germany, Great Britain, Italy, Netherlands, Sweden, Switzerland, and the USA. The app is continuously updated to include more countries.

### How does MHz help with white-space frequencies?

MHz uses your device's GPS to pinpoint your exact location and checks online databases for available white-space frequencies. This feature is available for specific countries and helps users find usable spectrum in their immediate area.

### Is MHz available on Android devices?

Based on the provided data, MHz is currently supported on iPhone, iPad, and iPod devices. Information regarding Android compatibility is not available.

### What is the price of MHz?

MHz is a paid application, priced at $0.99. This one-time purchase grants you access to all its features for finding wireless microphone frequencies and regulations.

### How often is MHz updated?

MHz was last updated on December 18, 2024, with version 1.5.2. This indicates a commitment to maintaining and improving the app's functionality and data.

### What is the user rating for MHz?

MHz has a user rating of 1.8 stars from 5 ratings. This suggests that while some users find value in the app, there may be areas for improvement based on overall user sentiment.

### Does MHz have ads?

No, MHz does not contain advertisements. As a paid application, it offers an ad-free experience for users.

### What is the age rating for MHz?

MHz has an age rating of 4+. This indicates that the app is considered suitable for users aged 4 and above, with no mature content.

## Version history (last 5 releases)

### 2.0.1 — 2026-08-06

Fixed a connection issue with PSM1000
You now have the option specify which network card to use when connecting to devices

### 2.0 — 2026-08-03

Learn intermodulation — and get more countries, more gear, more export options.

• New: Intermod Tool — an interactive guide to intermodulation, the hidden cause of wireless dropouts. Eight hands-on chapters take you from "what is IMD?" to reading a real RF spectrum, then let you loose in a free-form Playground with spectrum and stage views, IEM roles, and antenna diversity.
• Australia, United States, United Kingdom & Canada added — complete local TV transmitter data is bundled in the app, so location checks in these countries work fully offline, even deep in a venue with no signal.
• Sennheiser support — link Sennheiser receivers alongside your Shure gear and keep frequencies in sync between MHz and your racks.
• Range export — export any frequency range straight from the app for use in your other coordination tools.
• Clearer imports — imported channels now flash into view, so you can see exactly what arrived.

Plus smaller download size and general polish. Break a leg out there.

### 1.5.2 — 2024-12-18

Minor changes and updates

### 1.5.1 — 2024-05-24

An error that caused the wrong frequency list to be displayed when searching in Denmark, has been resolved.

Minor corrections and updates.

### 1.5 — 2024-04-02

You're now able to add your own groups and add as many members as you like. This will hopefully make it easier for you to track the frequencies you're using.

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## More apps by Jakup Andrias Knudsen

- [MeasureMate](https://appshunter.io/ios/app/measuremate/id6449699394)
- [AV Lens](https://appshunter.io/ios/app/av-lens/id6754453413)

All apps by Jakup Andrias Knudsen: https://appshunter.io/developer/1330607910

## Related topics

[mhz](https://appshunter.io/ios/topics/mhz) · [mhz choice](https://appshunter.io/ios/topics/mhz-choice)

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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 2026-09-02.*