A permanent license is a license that does not expire, and it continues to authorize access to PDF Reader Mac indefinitely.
Kdan's PDF Reader online store provides 2 types of lifetime access for you to choose from, including PDF Reader Standard and PDF Reader Pro. The Pro version enables you to access the advanced editing tools, OCR, and offline converter while the the Standard version only provides advanced editing tools.
Document 365 Subscription Plan
The Document 365 Subscription plan gives you access to all pro features and services you need across PDF Reader mobile and desktop apps. The plan includes monthly, quarterly, and yearly plans. You will be charged based on the subscription period of the plan you choose, and subscriptions will renew automatically, on your renewal date, until you cancel.
With Document 365 subscription, it gives you uninterrupted access to new versions and releases of PDF Reader all versions along with priority customer support.
The table below is a full comparison which highlights the key differences between PDF Reader's licensing version and subscription version:
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