Attenuator5.50 - App Store
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Publisher Description
Attenuator is a utility for anyone working with radio frequency sources and needs to know power and voltage after attenuation.
You can specify an input voltage (Vpp or Vrms) and dB of attenuation to get the output voltage, power and attenuation. The impedance can be specified, typically 50Ω for most systems.
There is a new emphasis on NMR utility, with options for calculating pulses based on reference power and pulse length. Powers are in Watts, dBm, and dB values.
Measure local magnetic field to check stray static fields from magnets.
See the local barometric pressure, useful if the magnet boil-off is high
Version History - Added Spanish and Korean localizations
- Improved translations across the app, especially for NMR, RF power, magnetic field, and accessibility text
- Improved VoiceOver support for Field, Barometer, Power, Pulse, and Settings
- Improved spoken units for VoiceOver, including dB, dBm, Vpp, Vrms, watts, tesla, pressure units, and pulse durations
- Improved Dynamic Type and long-language layout on the Field, Barometer, Power, and Pulse tabs
- Improved the Power calculator, including attenuation slider behavior, dB/dBm entry, unit prefixes, keyboard handling, and saved settings
- Improved the Pulse calculator, including localized labels, NMR pulse/power wording, keyboard handling, and long text layout
- Improved the magnetic field and barometer screens, including safer warning text, barometer unit selection with VoiceOver, and better error handling
- Removed deprecated UI code paths and fixed warnings
- Improved UI and general reliability
- Ad-free and fully unlocked, with no in-app purchases 5.50 Jul 1 Fixed error in barometer display. 5.11 01/05/2025 - Fixed barometer crashing
- Fixed Vpp/Vrms display 5.1 01/04/2025 Thorough graphics refresh. 5.0 10/25/2022 More digits displayed in power calculations
Small bug fixes 3.1.1 02/12/2015 Added a barometer to show local pressure (for iPhone 6 and iPhone 6 Plus only)
Cleaned up the interface mightily. What was I thinking before?
Bug fixes:
The reference section can be opened by tapping
The value of p1 or tpwr is no longer set to 4096
Translation fixes 3.1 01/24/2015 Updated for iPhone 6 and iPhone 6 Plus.
Updated localizations.
New: EPR conversions 3.0 12/03/2014 Updated the pulse calculations to include Biopack tpwrf
Added option to remove ads through in-app purchase.
Displays the local magnetic field. 2.0 08/30/2013 For NMR spectroscopists, added pulse calculations: calculate pulses based on power, in Watts or dB).
Entry of values automatically scaled by unix prefix. So 20 k is understood as 20000 and 20 m is 0.02. 1.5 09/01/2011 Input from all 7 fields: Enter in or out voltages, power of dBm and calculate the others based on attenuation.
Keyboard slides up to see all values.
iAds.
Still compatible with iOS 3.1.3 and above.
Tested on iOS 4.2 1.2 01/04/2011 Settings are now accessible in the application. Language improvements. iOS 4 multitasking supported. 1.1.1 07/16/2010 Now users can enter power in Watts or in dBm as well as in voltage.
Minor bug fixes in languages. 1.1.0 07/01/2010 1.0.0 04/21/2010
About Attenuator
The company that develops Attenuator is Tim Burrow. The latest version released by its developer is 5.50.
To install Attenuator on your iOS device, just click the green Continue To App button above to start the installation process. The app is listed on our website since 2026-10-15 and was downloaded 0 times. We have already checked if the download link is safe, however for your own protection we recommend that you scan the downloaded app with your antivirus. Your antivirus may detect the Attenuator as malware if the download link is broken.
How to install Attenuator on your iOS device:
- Click on the Continue To App button on our website. This will redirect you to the App Store.
- Once the Attenuator is shown in the iTunes listing of your iOS device, you can start its download and installation. Tap on the GET button to the right of the app to start downloading it.
- If you are not logged-in the iOS appstore app, you'll be prompted for your your Apple ID and/or password.
- After Attenuator is downloaded, you'll see an INSTALL button to the right. Tap on it to start the actual installation of the iOS app.
- Once installation is finished you can tap on the OPEN button to start it. Its icon will also be added to your device home screen.
Program Details
System requirements
Download information
Pricing
Version History
version 5.50
posted on 2026-10-15
Version History - Added Spanish and Korean localizations
- Improved translations across the app, especially for NMR, RF power, magnetic field, and accessibility text
- Improved VoiceOver support for Field, Barometer, Power, Pulse, and Settings
- Improved spoken units for VoiceOver, including dB, dBm, Vpp, Vrms, watts, tesla, pressure units, and pulse durations
- Improved Dynamic Type and long-language layout on the Field, Barometer, Power, and Pulse tabs
- Improved the Power calculator, including attenuation slider behavior, dB/dBm entry, unit prefixes, keyboard handling, and saved settings
- Improved the Pulse calculator, including localized labels, NMR pulse/power wording, keyboard handling, and long text layout
- Improved the magnetic field and barometer screens, including safer warning text, barometer unit selection with VoiceOver, and better error handling
- Removed deprecated UI code paths and fixed warnings
- Improved UI and general reliability
- Ad-free and fully unlocked, with no in-app purchases 5.50 Jul 1 Fixed error in barometer display. 5.11 01/05/2025 - Fixed barometer crashing
- Fixed Vpp/Vrms display 5.1 01/04/2025 Thorough graphics refresh. 5.0 10/25/2022 More digits displayed in power calculations
Small bug fixes 3.1.1 02/12/2015 Added a barometer to show local pressure (for iPhone 6 and iPhone 6 Plus only)
Cleaned up the interface mightily. What was I thinking before?
Bug fixes:
The reference section can be opened by tapping
The value of p1 or tpwr is no longer set to 4096
Translation fixes 3.1 01/24/2015 Updated for iPhone 6 and iPhone 6 Plus.
Updated localizations.
New: EPR conversions 3.0 12/03/2014 Updated the pulse calculations to include Biopack tpwrf
Added option to remove ads through in-app purchase.
Displays the local magnetic field. 2.0 08/30/2013 For NMR spectroscopists, added pulse calculations: calculate pulses based on power, in Watts or dB).
Entry of values automatically scaled by unix prefix. So 20 k is understood as 20000 and 20 m is 0.02. 1.5 09/01/2011 Input from all 7 fields: Enter in or out voltages, power of dBm and calculate the others based on attenuation.
Keyboard slides up to see all values.
iAds.
Still compatible with iOS 3.1.3 and above.
Tested on iOS 4.2 1.2 01/04/2011 Settings are now accessible in the application. Language improvements. iOS 4 multitasking supported. 1.1.1 07/16/2010 Now users can enter power in Watts or in dBm as well as in voltage.
Minor bug fixes in languages. 1.1.0 07/01/2010 1.0.0 04/21/2010
version 5.50
posted on 2026-09-03
Version History - Added Spanish and Korean localizations
- Improved translations across the app, especially for NMR, RF power, magnetic field, and accessibility text
- Improved VoiceOver support for Field, Barometer, Power, Pulse, and Settings
- Improved spoken units for VoiceOver, including dB, dBm, Vpp, Vrms, watts, tesla, pressure units, and pulse durations
- Improved Dynamic Type and long-language layout on the Field, Barometer, Power, and Pulse tabs
- Improved the Power calculator, including attenuation slider behavior, dB/dBm entry, unit prefixes, keyboard handling, and saved settings
- Improved the Pulse calculator, including localized labels, NMR pulse/power wording, keyboard handling, and long text layout
- Improved the magnetic field and barometer screens, including safer warning text, barometer unit selection with VoiceOver, and better error handling
- Removed deprecated UI code paths and fixed warnings
- Improved UI and general reliability
- Ad-free and fully unlocked, with no in-app purchases 5.50 Jul 1 Fixed error in barometer display. 5.11 01/05/2025 - Fixed barometer crashing
- Fixed Vpp/Vrms display 5.1 01/04/2025 Thorough graphics refresh. 5.0 10/25/2022 This app has been updated by Apple to prepare for watchOS 27 compatibility. No new features are included.
More digits displayed in power calculations
Small bug fixes 3.1.1 02/12/2015 Added a barometer to show local pressure (for iPhone 6 and iPhone 6 Plus only)
Cleaned up the interface mightily. What was I thinking before?
Bug fixes:
The reference section can be opened by tapping
The value of p1 or tpwr is no longer set to 4096
Translation fixes 3.1 01/24/2015 Updated for iPhone 6 and iPhone 6 Plus.
Updated localizations.
New: EPR conversions 3.0 12/03/2014 Updated the pulse calculations to include Biopack tpwrf
Added option to remove ads through in-app purchase.
Displays the local magnetic field. 2.0 08/30/2013 For NMR spectroscopists, added pulse calculations: calculate pulses based on power, in Watts or dB).
Entry of values automatically scaled by unix prefix. So 20 k is understood as 20000 and 20 m is 0.02. 1.5 09/01/2011 Input from all 7 fields: Enter in or out voltages, power of dBm and calculate the others based on attenuation.
Keyboard slides up to see all values.
iAds.
Still compatible with iOS 3.1.3 and above.
Tested on iOS 4.2 1.2 01/04/2011 Settings are now accessible in the application. Language improvements. iOS 4 multitasking supported. 1.1.1 07/16/2010 Now users can enter power in Watts or in dBm as well as in voltage.
Minor bug fixes in languages. 1.1.0 07/01/2010 1.0.0 04/21/2010
version 5.50
posted on 2026-08-21
Version History - Added Spanish and Korean localizations
- Improved translations across the app, especially for NMR, RF power, magnetic field, and accessibility text
- Improved VoiceOver support for Field, Barometer, Power, Pulse, and Settings
- Improved spoken units for VoiceOver, including dB, dBm, Vpp, Vrms, watts, tesla, pressure units, and pulse durations
- Improved Dynamic Type and long-language layout on the Field, Barometer, Power, and Pulse tabs
- Improved the Power calculator, including attenuation slider behavior, dB/dBm entry, unit prefixes, keyboard handling, and saved settings
- Improved the Pulse calculator, including localized labels, NMR pulse/power wording, keyboard handling, and long text layout
- Improved the magnetic field and barometer screens, including safer warning text, barometer unit selection with VoiceOver, and better error handling
- Removed deprecated UI code paths and fixed warnings
- Improved UI and general reliability
- Ad-free and fully unlocked, with no in-app purchases 5.50 Jul 1 Fixed error in barometer display. 5.11 01/05/2025 - Fixed barometer crashing
- Fixed Vpp/Vrms display 5.1 01/04/2025 Thorough graphics refresh. 5.0 10/25/2022 This update from Apple will improve the functionality of this app. No new features are included.
More digits displayed in power calculations
Small bug fixes 3.1.1 02/12/2015 Added a barometer to show local pressure (for iPhone 6 and iPhone 6 Plus only)
Cleaned up the interface mightily. What was I thinking before?
Bug fixes:
The reference section can be opened by tapping
The value of p1 or tpwr is no longer set to 4096
Translation fixes 3.1 01/24/2015 Updated for iPhone 6 and iPhone 6 Plus.
Updated localizations.
New: EPR conversions 3.0 12/03/2014 Updated the pulse calculations to include Biopack tpwrf
Added option to remove ads through in-app purchase.
Displays the local magnetic field. 2.0 08/30/2013 For NMR spectroscopists, added pulse calculations: calculate pulses based on power, in Watts or dB).
Entry of values automatically scaled by unix prefix. So 20 k is understood as 20000 and 20 m is 0.02. 1.5 09/01/2011 Input from all 7 fields: Enter in or out voltages, power of dBm and calculate the others based on attenuation.
Keyboard slides up to see all values.
iAds.
Still compatible with iOS 3.1.3 and above.
Tested on iOS 4.2 1.2 01/04/2011 Settings are now accessible in the application. Language improvements. iOS 4 multitasking supported. 1.1.1 07/16/2010 Now users can enter power in Watts or in dBm as well as in voltage.
Minor bug fixes in languages. 1.1.0 07/01/2010 1.0.0 04/21/2010
version 5.50
posted on 2026-07-06
Version History - Added Spanish and Korean localizations
- Improved translations across the app, especially for NMR, RF power, magnetic field, and accessibility text
- Improved VoiceOver support for Field, Barometer, Power, Pulse, and Settings
- Improved spoken units for VoiceOver, including dB, dBm, Vpp, Vrms, watts, tesla, pressure units, and pulse durations
- Improved Dynamic Type and long-language layout on the Field, Barometer, Power, and Pulse tabs
- Improved the Power calculator, including attenuation slider behavior, dB/dBm entry, unit prefixes, keyboard handling, and saved settings
- Improved the Pulse calculator, including localized labels, NMR pulse/power wording, keyboard handling, and long text layout
- Improved the magnetic field and barometer screens, including safer warning text, barometer unit selection with VoiceOver, and better error handling
- Removed deprecated UI code paths and fixed warnings
- Improved UI and general reliability
- Ad-free and fully unlocked, with no in-app purchases 5.50 4d ago Fixed error in barometer display. 5.11 01/05/2025 - Fixed barometer crashing
- Fixed Vpp/Vrms display 5.1 01/04/2025 Thorough graphics refresh. 5.0 10/25/2022 This update from Apple will improve the functionality of this app. No new features are included.
More digits displayed in power calculations
Small bug fixes 3.1.1 02/12/2015 Added a barometer to show local pressure (for iPhone 6 and iPhone 6 Plus only)
Cleaned up the interface mightily. What was I thinking before?
Bug fixes:
The reference section can be opened by tapping
The value of p1 or tpwr is no longer set to 4096
Translation fixes 3.1 01/24/2015 Updated for iPhone 6 and iPhone 6 Plus.
Updated localizations.
New: EPR conversions 3.0 12/03/2014 Updated the pulse calculations to include Biopack tpwrf
Added option to remove ads through in-app purchase.
Displays the local magnetic field. 2.0 08/30/2013 For NMR spectroscopists, added pulse calculations: calculate pulses based on power, in Watts or dB).
Entry of values automatically scaled by unix prefix. So 20 k is understood as 20000 and 20 m is 0.02. 1.5 09/01/2011 Input from all 7 fields: Enter in or out voltages, power of dBm and calculate the others based on attenuation.
Keyboard slides up to see all values.
iAds.
Still compatible with iOS 3.1.3 and above.
Tested on iOS 4.2 1.2 01/04/2011 Settings are now accessible in the application. Language improvements. iOS 4 multitasking supported. 1.1.1 07/16/2010 Now users can enter power in Watts or in dBm as well as in voltage.
Minor bug fixes in languages. 1.1.0 07/01/2010 1.0.0 04/21/2010
version 5.11
posted on 2026-06-29
Version History Fixed error in barometer display. 5.11 01/05/2025 - Fixed barometer crashing
- Fixed Vpp/Vrms display 5.1 01/04/2025 Thorough graphics refresh. 5.0 10/25/2022 This update from Apple will improve the functionality of this app. No new features are included.
More digits displayed in power calculations
Small bug fixes 3.1.1 02/12/2015 Added a barometer to show local pressure (for iPhone 6 and iPhone 6 Plus only)
Cleaned up the interface mightily. What was I thinking before?
Bug fixes:
The reference section can be opened by tapping
The value of p1 or tpwr is no longer set to 4096
Translation fixes 3.1 01/24/2015 Updated for iPhone 6 and iPhone 6 Plus.
Updated localizations.
New: EPR conversions 3.0 12/03/2014 Updated the pulse calculations to include Biopack tpwrf
Added option to remove ads through in-app purchase.
Displays the local magnetic field. 2.0 08/30/2013 For NMR spectroscopists, added pulse calculations: calculate pulses based on power, in Watts or dB).
Entry of values automatically scaled by unix prefix. So 20 k is understood as 20000 and 20 m is 0.02. 1.5 09/01/2011 Input from all 7 fields: Enter in or out voltages, power of dBm and calculate the others based on attenuation.
Keyboard slides up to see all values.
iAds.
Still compatible with iOS 3.1.3 and above.
Tested on iOS 4.2 1.2 01/04/2011 Settings are now accessible in the application. Language improvements. iOS 4 multitasking supported. 1.1.1 07/16/2010 Now users can enter power in Watts or in dBm as well as in voltage.
Minor bug fixes in languages. 1.1.0 07/01/2010 1.0.0 04/21/2010
version 5.11
posted on 2025-01-05
Fixed error in barometer display.
version 5.11
posted on 2025-01-05
Jan 5, 2025
Version 5.11
Fixed error in barometer display.
version 5.0
posted on 2022-10-25
Oct 25, 2022
Version 5.0
Thorough graphics refresh.
version 3.1.1
posted on 2015-02-12
Feb 12, 2015 Version 3.1.1
This app has been updated by Apple to display the Apple Watch app icon.
More digits displayed in power calculations
Small bug fixes
version 3.1.1
posted on 2015-02-12
Feb 12, 2015 Version 3.1.1
This app has been updated by Apple to use the latest Apple signing certificate.
More digits displayed in power calculations
Small bug fixes
Disclaimer
Official App Store Link
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