ALERT timeable and overwritable

MIT App Inventor Help
2

Here are some extensions taken from App Inventor Extensions | Pura Vida Apps that might help you.

  1. Toast with X Y values Extension by Andres Daniel

  2. Custom Toast (including Picture) Extension by Said Dev (5 USD)

  3. Advanced Android Toast Extension by Zhangzqs

  4. Toast Extension by help_cttricks

  5. OriginalToast Extension by Salman_Dev

  6. My Toast Extension by electrobot_appy (Test extension)

  7. Motion Toast Extension by Sumit1334 to show custom and motion toasts in apps

  8. System Alert Window Extension by Ben (10 USD)