True Note

True Note

When I was a kid I had a strobe disc and a neon test light to measure turntable speed. Both lost over the years. This app fills that need quite well.

Does what I need it to do, no issues whatsoever… most straightforward strobe application on the app store for checking your turntable's RPM. Props to developer.

A free app to test a record player to see if it’s playing at the correct speed.

Here’s how True Note works:

  1. Download the True Note app and open it
  2. Print and cut out the included turntable strobe disc
  3. Place the strobe disc on your record player and start it at the 33 1/3 RPM speed
  4. Tap “START” in the True Note app and shine the flashing LED light from your iOS device onto the strobe disc

If your record player is playing at the correct speed, you should be able to make out the individual lines on the strobe disc – and they should appear to remain in the same position (not drifting in one direction).

Many record players have an adjustable speed and can be calibrated with the help of True Note.

Perhaps you’re shopping for a used record player? The True Note strobe disc is small enough that you can fold it in half to keep in your wallet or iPhone case – ready to use when you’re at a thrift store or garage sale and want to make sure the turntable you’re considering buying works properly.

True Note screenshot
Download on the App Store


Need help? Start here:
Ikiru: Instructions | FAQ
Paperless: Instructions | FAQ
Scout Camera: FAQ

If you need further help or have a suggestion, contact me:
(Unfortunately I can’t respond to every email. As of now, this is a hobby not my full time job.)


Crush Apps is an iOS software development project run by Jim Rhoades. I create outstanding applications that are fun and easy to use.

These days I’m mainly interested in photography related things.


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