I'll send you the specs of the smartphone/tablet/computer I plan to use, so could you check if there are any issues with performance?

Since verifying whether there are absolutely no issues would require testing on the exact same device, we are unable to perform such confirmation on our end.

The supported operating environments are as follows.

✓ List of Supported Environments
https://help.teachme.jp/hc/en-us/articles/14572215297305

Please conduct actual operation testing on your end as needed.

Please note that Teachme Biz offers a 14-day free trial.
For more details, please refer to the following.

✓ Is It Possible to Try Before Implementing?
https://help.teachme.jp/hc/en-us/articles/900005509226