The best and worldwide famous BETERAMP TUBE BIAS CALCULATOR. This app is a 3 awards winner by the Vintage Electronics Magazine and the London University of Electronics. Get the most accurate values to set up your tube amp properly and make it safe and sounding like never before. The best thing of this app is that you can use it even when you have no INTERNET connection, wich is great as many times you can't have internet access in the same place that you are fixing or re-biasing the amp, it is so easy to use and fast. There're lots of calculators on the net but they are not as accurate, fast like this one, also they need you to be ONLINE to work so you can't always use them. This app was developed by Paco Pascual himself, recognized by the most well known electronics Universities around the world. You will need this calculator always and now it's got the best price ever, AMAZING !

* LIST OF TUBES YOU CAN CHECK *** 25 tubes so far !!! ***

p.s. probably you can find online some similar calculators, but no one has got as many tubes as this one, no one has got the accuracy of this one and THE MOST IMPORTANT THING IS no one of them you can take with you everywhere and use it where there's no internet connection, and no one has got so many different tubes on it's tube calculation list !!!

What's New

Version 7.5

- Now it comes with even more tubes, we've just added the great 6550 Tube, which is used in many amps like Marshalls, Ampegs, etc...
- This app now works mega-fast and smooth and as usual not internet connection needed, exceptional accuracy.
- If you like this app and find it useful, please take your time and leave a good feedback, that really will help to keep this app updated and running so good, big THANK YOU guys for your support.

*** Paco Pascual ***

Ratings and Reviews

Plate voltage

75 DBZ

Wish it had plate voltage listed. If I have to search for volts then I might as well Google search for bias too. Decent app all in all.

Tube Bias

Rusty Bones Amps

Accurate & fast. Well worth the money.

Layout needs to be fixed


App looks like a webpage. Need to zoom in to use it. Doesn't resize properly when turned to landscape either. Does not look like it does in the App Store photo.


francisco manuel crespillo
132.6 MB
Requires iOS 5.1.1 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2014 worlwide Copyright by Uk Patents and trade marks .


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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