Is a gem ready for Rails 4 or 5?

Rails 4: 614 ready, 38 not ready, and 433 unknown
Rails 5: 157 ready, 12 not ready, and 916 unknown
Name Status Rails 4 Notes Rails 4 Status Rails 5 Notes Rails 5 Status or notes updated
sprockets ready

Official rails gem

unknown

Doesn't explicitly say anywhere that it supports Rails 5 but... other guides (eg this one: https://medium.com/@coorasse/goodbye-sprockets-welcome-webpacker-3-0-ff877fb8fa79 talk about upgrading sprockets to webpacker on Rails 5.1 (and talk about sprockets being present first), so I'm assuming it is Rails 5 ready... though no longer recommended.

2 days ago
turbolinks ready

-

ready

use version gem 5.2

2 days ago
uglifier ready

does not depend on Rails

ready

does not depend on Rails

2 days ago
webmock ready

Does not depend on Rails.

ready

does not depend on Rails

2 days ago
rollbar ready

since version 0.10.3

ready

ready since version v2.10.0

7 days ago
stripe ready

Does not depend on rails

ready

does not depend on Rails

7 days ago
bcrypt-ruby ready

Does not depend on Rails

ready

Does not depend on Rails

7 days ago
marco-polo ready

running in our 4.2 app for some time

ready

Not specified... Has rails dependencies, but just uses ENV vars for app name. Probably ok.

8 days ago
capybara-selenium ready

Running on our 4.2 app for some time

ready

Not dependent on Rails

8 days ago
rspec-collection_matchers ready

Running on our 4.2 app for some time

unknown

unspecified in README/changelog Plausibly has dependencies on Rails (AR) architecture.

8 days ago
rspec-activemodel-mocks ready

running on our 4.2 app for some time

unknown

Not specified in README - unclear if it's compatible or not

8 days ago
rubocop-rspec ready

Running on our 4.2 app for some time

ready

Not dependent on rails

8 days ago
listen ready

Running on our 4.2 app for some time

ready

Not dependent on rails

8 days ago
spring-watcher-listen ready

running in our 4.2 app

ready

Doesn't seem dependent on rails

8 days ago
byebug ready

running in our 4.2 app

ready

Not dependent on Rails

8 days ago
strong_migrations ready

running on our 4.2 app for some time

ready

5.2 from v0.2.3 5.0 from v0.1.7

8 days ago
rainbow ready

not dependent on rails

ready

not dependent on rails

8 days ago
librato-rails ready

Running on our 4.2 app for some time

ready

5.0 support from v2.1.0

8 days ago
canonical-rails ready

running on our 4.2 app for some time

ready

5.2 from v0.2.3 5.1 from v0.2.0 5.0 from v0.1.1

8 days ago
jwt ready

Running on our 4.2 app for some time.

ready

Not dependent on rails

8 days ago