When comparing Iosevka vs MonoLisa, the Slant community recommends Iosevka for most people. In the question“What are the best programming fonts?” Iosevka is ranked 6th while MonoLisa is ranked 54th. The most important reason people chose Iosevka is:
Iosevka is very clear and legible on all displays and in all sizes.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Readable
Iosevka is very clear and legible on all displays and in all sizes.
Pro Narrow
Narrow character width uses horizontal screen space more efficiently.
Pro Large number of weights
This font comes in seven different weights, ranging from thin and extra-light to heavy.
Pro Great customizability
There is full customization of styles and variants in Iosevka.
Pro Support for Cyrillic and Greek letters
Iosevka is quite flexible in that it supports Cyrillic and Greek letters.
Pro Free and open source
Iosevka is free and open source.
Pro Powerline support
Includes characters for supporting Powerline/Airline for terminals and terminal editors.
Pro Ligature characters look great
Few fonts have a good ligation feature. Ligature characters (such as æ or the German ß) are supported in Iosevka and look just as you'd expect them to.
Pro Several styles available
Many of the common styles are available, including Sans Serif and Slab Serif with normal, bold, italic, and bold italic styles.
Pro IPA Support
IPA is a system containing the sounds of spoken language and includes speech qualities such as intonation.
Pro Easy on user's eyes
Due to it being readable on all types of displays, Iosevka isn't hard on the user's eyes.
Pro Well-maintained
The developer is active and responds to user questions and issues.
Pro Good CJK compatibility
Iosevka integrates CJK characters well, those being characters of the Chinese, Japanese, Korean, and occasionally Vietnamese languages.
Pro Also variant with tiny serifs available ("Slab")
For better reading longer texts.
Pro Customizable OpenType features downloads
The website offers customizable downloads for editors that don't support OpenType features natively.
Pro Script variant
It comes with script variant for italics.
Pro Ligatures
The typeface supports over 120 optionally enabled ligatures for common coding tasks.
Pro Italics
The typeface comes with an italic version.
Pro Space
Space used by the characters has been carefully balanced to keep them light to read.
Pro Reading flow
The characters have been designed to flow into each other so that the font feels easy to read.
Pro Distinction
Specific care has been put to make programming characters such as 1, i, and l or O or 0 easy to tell apart.
Pro Wider than usual
As it's wider, this means there's more space for designing characters like "m".
Cons
Con Too narrow
Con Must do a custom build to get all ligatures
Con Fewer ligatures than other fonts
Iosevka has a nice ligation set, but it doesn't have as many ligatures as fonts like Hasklig, Monoid, or Pragmata Pro.
Con Not free
This font requires a purchase in order to be used. The cheapest version ('Basic') is 60 dollars. There is a free trial, though.
Con Wider than usual
As it's wider, this means a short adjustment period may be required. If you have a limited amount of horizontal space, the wider glyphs may be problematic as well.