When comparing Comic Time Reader vs Perfect Viewer, the Slant community recommends Perfect Viewer for most people. In the question“What are the best comic book readers for Android?” Perfect Viewer is ranked 4th while Comic Time Reader is ranked 6th. The most important reason people chose Perfect Viewer is:
It doesn't add the "right" color (it uses an algorithm to replace 4 shades of grey with 4 earth-tones), but it makes B&W comics a little more interesting.
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Pros
Pro Guided View works on your own collection
Guided View borders computed on-device so you can use this feature on any of your own files.
Pro False Color feature can add color to otherwise B&W manga
It doesn't add the "right" color (it uses an algorithm to replace 4 shades of grey with 4 earth-tones), but it makes B&W comics a little more interesting.
Cons
Con Hasn't been updated in years
Con Options are sparse
If "Guided View" isn't a must-have feature for you, Comic Time Reader's other features (or lack thereof) may leave you wanting.