What are the key differences between Sumatra PDF and Things 3?

Compare Sumatra PDF and Things 3 side by side on Lunoo to see detailed feature differences, AI scores, and expert analysis.

How are Sumatra PDF and Things 3 scored?

Sumatra PDF has an AI score of 6.0/10 and Things 3 has an AI score of 8.7/10. Scores are based on features, user satisfaction, and overall quality analysis.

Sumatra PDF vs Things 3 2026 — Compared

Sumatra PDF

Things 3

WINNER Things 3

Things 3 edges ahead with a score of 8.7/10 compared to 6.0/10 for Sumatra PDF. While both are highly rated in their res...

Sumatra PDF

6.0 Fair

SAAS Get Sumatra PDF open_in_new

emoji_events WINNER

Things 3

8.7 Very Good

Office Furniture Get Things 3 open_in_new

psychology AI Verdict

Things 3 edges ahead with a score of 8.7/10 compared to 6.0/10 for Sumatra PDF. While both are highly rated in their respective fields, Things 3 demonstrates a slight advantage in our AI ranking criteria. A detailed AI-powered analysis is being prepared for this comparison.

emoji_events Winner: Things 3

verified Confidence: Low

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description Overview

Sumatra PDF

Sumatra PDF is a lightweight, free PDF reader for Windows. It is designed to be as fast as possible, opening documents almost instantly. It supports PDF, eBook (ePub, Mobi), XPS, DjVu, CHM, and Comic Book (CBZ and CBR) formats. It is incredibly minimalist, which is both its greatest strength and its weakness; it lacks annotation, editing, and form-filling capabilities. If you only need to view doc...

Things 3

Things 3 is widely considered the most beautiful and intuitive task manager for the Apple ecosystem. Its design philosophy centers on clarity and focus, using a unique 'headings' and 'projects' structure that makes managing complex life goals feel effortless. While it lacks the cross-platform flexibility of competitors, its native integration with macOS, iOS, and watchOS is unmatched in terms of s...