fern-logger is used at run time in 4 crates (of which 3 optionally).

Depender (with downloads and own rev deps) fern-logger version
1.5K 4 iota-sdk optional ^0.5.0
340 etopay-sdk ^0.5.0
650 1 etospheres-labs-iota-sdk optional ^0.5.0
trace-tools ^0.5.0