Is a gem ready for Rails 4 or 5?

Rails 4: 573 ready, 37 not ready, and 436 unknown
Rails 5: 75 ready, 8 not ready, and 963 unknown

Gems unknown for Rails 4

Name Status Rails 4 Notes Rails 4 Status Rails 5 Notes Rails 5 Status or notes updated
a2ws unknown unknown about 4 years ago
abyss-navigation-rails unknown unknown about 4 years ago
actionwebservice unknown unknown about 4 years ago
active_metadata unknown unknown about 4 years ago
active_model_serializers unknown unknown about 4 years ago
active_model_serializers-ct unknown unknown about 4 years ago
active_monitor unknown unknown about 4 years ago
activerecord-activesalesforce-adapter19 unknown unknown about 4 years ago
active_record-duplicate unknown unknown about 4 years ago
activerecord-illiad-adapter unknown unknown about 4 years ago
activerecord-voyager-adapter unknown unknown about 4 years ago
activesalesforce unknown unknown about 4 years ago
acts_as_api unknown unknown about 4 years ago
acts_as_audited unknown unknown about 4 years ago
acts_as_datetime unknown unknown about 4 years ago
acts_as_duplicator unknown unknown about 4 years ago
acts_as_duration unknown unknown about 4 years ago
acts_as_ferret unknown unknown about 4 years ago
acts_as_leaflet unknown unknown about 4 years ago
acts-as-messageable unknown

Currently testing

unknown about 3 years ago