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You can now review the differences across the comparison table below.

Criteria	behavioralInterpreterView pattern	creationalSingletonView pattern
Basics
Category	behavioral	creational
Summary	—	—
Intent	Represent grammar rules as objects and interpret sentences by evaluating an abstract syntax tree or expression chain.	Ensure a class has only one instance and provide a global access point to it.
Decision factors
Problem	You need to define a small language or expression grammar and evaluate it consistently across the application.	A system needs exactly one shared instance of a class, and that instance must be globally accessible without allowing uncontrolled duplication.
Tradeoffs	Can become complex if the grammar grows too large. Best suited to small, well-defined languages or expression sets.	Can make dependencies harder to test if the singleton is used everywhere May introduce hidden global state that complicates debugging and concurrency
Practical fit
Languages	typescript java python angular react react-native csharp dotnet	typescript java python angular react react-native csharp dotnet
Platforms	Web Backend Mobile UI kits Cross-platform systems	Web Backend Mobile UI kits Cross-platform systems
Integration notes	Interpreter is useful for calculators, rule engines, simple DSLs, and command parsing systems where a structured grammar must be evaluated.	Singleton is useful for centralized services like configuration, logging, caching, and shared application state.