Hive Keychain for mobile is now available in version 1.1.2 on both Android and iOS (the issue with Apple is finally resolved). It introduces an in-App browser that lets you use your dApps in a similar manner that on desktop, with the dApps issuing requests to Keychain, that will then sign the transactions upon approval.
Here's an example of logging in on PeakD:

All the major request types are already implemented, so that you can make the most of your Keychain experience on mobile :
The release was delayed by one day to add browser history management and url autocomplete features.
Hope you will enjoy it!
Some additional requests are still missing but more rarely used, and will be added soon.
Additionally, the browser will be improved with favorites and multiple tabs handling. We will also add the possibility to whitelist some requests in the future, in order to mirror the behavior that you can find on the browser extension.
On your extension, navigate to the menu (top right button), then to Manage Accounts and finally click on Show QR Code.
To communicate with us or become an Alpha tester, join our Discord by following this link :
https://discord.gg/3EM6YfRrGv
Or scanning this QR Code :
@stoodkev : Lead Dev - Witness
@nateaguila : UI/UX
@yabapmatt : Founder - Witness
@aggroed : Founder - Witness
100% of payout is redirected to the DAO