About Product Keys

- You need a "Product Key" to continue to use Vocabulary Tool after testing days.

- Vocabulary Tool Team gives you this "Product Key".

- One valid "Product Key" is invalid for other computers. Because it depends on your operating system and hardware.

- "Product Key" is valid until you change your operating system or hardware. If you lose your key with these factors, you must get a new key from us with a new payment.