Yes, it's generally true that you cannot save your seat choice without freezing it in the APICET seat allotment process. This is a standard procedure implemented by most counseling authorities to ensure the smooth and efficient allotment of seats.

Here's why the freeze option is mandatory:

• Preventing Seat Blocking: Freezing your choice prevents you from blocking a seat that you might not ultimately accept.
• Efficient Seat Allocation: By freezing your choice, the counseling authority can move on to the next candidate, ensuring that all available seats are filled efficiently.
• Fairness: This system ensures fairness to all candidates by preventing seat hoarding.

If you don't freeze your choice, your preferences will not be saved, and you might lose the opportunity to get the allotted seat. Therefore, it's crucial to carefully consider your options and freeze your choice accordingly.

Remember: Once you freeze your choice, you cannot modify it. So, make sure you're confident about your selection before proceeding.