The best replacement for acrobat pro is adobe reader.

The best alternatives to acrobat pro are rated as following:
★★★★★  adobe reader
★★★★★  acrobat pro extended
★★★★★  preview
★★★★  acrobat x pro
★★★★  acrobat standard
★★★★  nitro pro
★★  foxit phantom
★★  acrobat x
★  distiller
★  bluebeam
★  livecycle designer
★  pro extended
  acrobat

Your alternative for acrobat pro is not listed? Suggest!
Speaking about acrobat pro, one probably shouldn't forget about ocr.

Other search terms related to acrobat pro and their ratings are:
★★★★★ ocr
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Google Trends

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acrobat pro
adobe reader
acrobat pro extended