The steps for application and selection procedure are as follows:

• Fill the application form here
• On clicking the ”submit” button, you will be guided to our sample test platform, covering 
  three rounds of tests (Stage I, Stage II, and Stage III), and a confirmation email will be sent to 
  you. 
  a. Stages I and II: Multiple-choice quiz 
  b. Stage III: Sample editing test under your preferred area of expertise
• We consider the combined score from all three stages, based on our predefined benchmarks, 
  to determine your eligibility for a contract. This contract includes a freelance editor 
  agreement, terms of service, and other pertinent documents.
• After successfully fulfilling the aforementioned hiring procedures, you will be onboarded and 
  welcomed to our esteemed pool of expert freelance editors.

The test should be edited using the “Track Changes” feature of MS Word. The sample is not entirely representative of the work you will receive; it is targeted at skill assessment only. The sample itself will be an excerpt from a manuscript authored by non-native English-speaking researchers, intended for an international audience. Therefore, apart from the usual revisions pertaining to language, 
grammar, punctuation, and academic writing style, it may warrant sentence reconstruction and content changes to varying degrees. Please feel free to use supporting comments/notes to explain extensive changes and content enhancements, if any, and/or to clarify ambiguities.

No, all you need is Microsoft Word.