part 1. write a simple paragraph about the topic 'sign pdf files on iPhone' (less than 250 words)
Part 2. List out the top 5 software that can sign PDF files on iPhone (content for each apps should cover: price, download address, score, key features and steps to sign PDF files on iPhone. Screenshots are required too.)
1.extra research is needed;
2. Unique article with more than 800 words.
3. Absolutely don't plagiarize. I can check it out.
4. Send in Doc with required images.
5. Finish in 3 day