In what types of applications is automated testing usually not required?

Automated testing is usually not required in the following types of applications:

• Prototypes and experimental projects — when the product is in the early stages and changes frequently, automation may be ineffective.
• Very small or one-time scripts/utilities — if the application is very simple and not expected to be further developed.
• Applications with very low change frequency — where manual testing can be sufficiently economical.
• Certain types of research or scientific applications, where quick hypothesis testing is more important than code stability.

However, even in these cases, automation can help if the project is planned to be developed or maintained for a long time.