Articles on: Problems and issues

Mobile App

Known Issues

We are aware of the following bugs and are working to fix them:

This issue seems to happen on Samsung devices especially. The following steps have resolved the issue for some users in the past:

Uninstall the app
Download and install this APK:
If the app opens correctly, then go to Play Store and update.

If the app does not open correctly, or you have trouble with these instructions, please contact support.

Flashcards/Mountain Items are missing

Go to Settings
Click the "Refetch" button:

Wait for the spinner to disappear
Restart the app

The app should then say "setting up" and try fetching the definitions again.

Downloaded Videos Not Playing

Downloads are an experimental feature and do not yet work properly on some devices.

Try waiting up to 30 seconds after tapping the video and the spinning circle disappears on the right, it might end up playing.

Stuck on Loading (Spinning Circle)


Please uninstall and reinstall the app.


Please try uninstalling and reinstalling the app. This doesn't work on some devices (especially Samsung), so please press the "chat" button to reach out to our support team.

Frequently asked questions

Videos don't play at all

It's likely an issue with the video host Vimeo. Please check for what could be causing the problem.

I can't see PrepSwift

Did you subscribe to the PrepSwift add-on? It won't appear if you didn't - you'll need to upgrade by going to If you are sure you did however, contact the customer service representatives.

I only see limited content (such as the first 10 days of the vocab mountain)

This is because you're on a free account and haven't subscribed to GregMAT+. Once you subscribe to GregMAT+ and reload the app, you should be able to see the other groups and videos.

Contact Us

If the information above does not solve your issue, please press the "Chat" button on the bottom-left and get in touch with our support team, and we'll try our best to help you out.

Updated on: 15/07/2024

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