ST Math black screen problem workaround for iPadOS 15.4+

Our engineering team has added a feature for iPads updated to iPadOS 15.4+. When students sign in, they can click on their name, and select ‘Settings’ to turn on the ‘Use Canvas’ toggle. This will resolve black screens and other issues caused by the 15.4 update.

You will also see a ‘Legacy’ toggle. Most iPads will NOT need to enable this, but if you have an older devices with 2 GB of RAM or less you may find it helps ST Math run more smoothly. The toggle disables background animations (like clouds and waves), but does not disable game animations (informative feedback).


These settings are device-based. They will need to be enabled on each affected device. The settings are saved and will persist between sessions until the cache is cleared.

If you have any questions, reply to this email, or reach out at 888-491-6603 weekdays from 5 am to 5 pm Pacific.