Published by Luke Phillips, Femur

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Why should I report an Issue with Theremin?

  1. AppContacter will directly Email your issue/feedback to an apps's customer service once you report an issue and with lots of issues reported, companies will definitely listen to you.
  2. Pulling issues faced by users like you is a good way to draw attention of Luke Phillips, Femur to your problem using the strength of crowds.
  3. Importantly, customers can learn from other customers in case the issue is a common problem that has been solved before.
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About Theremin

1. Play it by touching and swiping the screen, changing the waveforms and sliding the effects to create anything from traditional sci-fi theremin sounds to deep scuzzy soundscapes.

2. Then if you wish to save or share your recording, hit the download button to send your wav file to other compatible apps like Messages, Email, Dropbox etc.

3. Now the Theremin is ready for you to experiment with. • Loops can be shared with other apps like Mail, Message and more.

4. Dangerous Minds “New online theremin simulator kind of sounds cooler than the real thing.

5. The original Theremin went live in 2014 on the web at femurdesign. com/theremin.

6. Turn the volume all the way up, give the dog a panic fit, and make your neighbours think the street's being invaded by giant cabbage people from planet Zok.

7. Over a million hits later and hundreds of requests for a record button, I have redesigned it.

8. Use the looper controls to record, loop and overdub layers.

9. Gizmodo "Just mess around! Twiddle those faders!

10. Swipe and click with reckless abandon!

11. This is a multitouch synth instrument.

Theremin Customer Insights

1. Extremely accessible, excellent user interface.Love this, let's you record small pieces on top of each other for unique sounds.this app will not open.

2. But it does have lots of potentail.Wow! First decent theremin app I've found so far! Cool sounds & really playable!Decent Theremin with low latency.

3. Unfortunately it has stopped working on my Andriod and computer.I saw it on the computer, looked cool... gets EXTREMLY BOREING.

4. it is bugged rendering it useless and therefore my money has been taken for nothing.

5. It was an excellent app, but it doesn't even open anymore.

6. I also don't think I'll be getting a refund as it's been way passed 48hrs.

7. 😪Absolutely brilliant and now easily accessible for live performances.

8. I can use it onstage for 2,000 Light Years From Home.Does what it says on the tin.

9. (edit: i received a full refund)This was so much fun.

10. Thus app no longer works for my device.

Steps to Troubleshoot & Fix Theremin Issues

1. Fix Theremin Not Working/Crashes/Errors/Unresponsive & Black/White screen:


  1. Restart Theremin: Restarting the app will resolve most errors.
  2. Update the Theremin App. Here is how:
    1. On Android goto PlayStore » Search for "Theremin" » Open Theremin » click "Update".
    2. On iPhone, goto AppStore » Your profile » Available Updates » Check for Theremin » click "UPDATE".
  3. Clear Theremin app cache: Clearing cached data will force your app to retrieve the latest data directly from Theremin servers.
    1. On Android, goto Settings » Apps » Select "Theremin" » click Storage » click "Clear Cache".
  4. Check Theremin app permissions. If any of these permissions required to use your device's features are disenabled, Theremin might not work.
  5. Uninstall and reinstall Theremin. If nothing else has worked, completely uninstall Theremin then reinstall.
  6. Restart your device. Last, restarting your device can often clear most problems causing Theremin not working


2. Fix Theremin Server issues & Internet Connection


  1. Check network connection: An unstable Internet will make Theremin be unable to connect to it's servers. Ensure your wi-fi is working then restart app.
  2. Disable VPN: VPN can cause connection errors and lead to Theremin not working. Make sure all VPNs are off
  3. Enable background data: When Background data is turned off, Theremin may not be able to connect to the Internet when running in the background.

Reported Issues