Based on our record, xournal seems to be more popular. It has been mentiond 3 times since March 2021. We are tracking product recommendations and mentions on Reddit, HackerNews and some other platforms. They can help you identify which product is more popular and what people think of it.
Xournal works pretty well for me on GNU/Linux. You just have to turn on the "Legacy PDF Export" option. - Source: Reddit / about 2 months ago
If by "writing" you mean with a stylus on a tablet, Xournal. - Source: Reddit / 5 months ago
Myself I been using Xournal can be used to annotate PDFs. - Source: Reddit / 6 months ago
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