Ledger has it’s own client application? O_o I always thought they just connect to existing clients\wallets for different coins. Does it like only show all your balances on the Ledger or it can do something else?
Or is it not connected to hard-wallets at all? 
From Ledger:
Initial released feature: One unique App for all currencies
Our initial release will bring all the current set of features supported by all our different apps, but in a unified and multi currency unique application.
You’ll find the full list of features of this first release below:
*Native desktop application (Windows, macOS, Linux)
*Multi currencies (28 cryptos including Bitcoin, Altcoins, Ethereum, Ripple…)
Multi devices (Ledger Nano S, Ledger Blue)
*Read only consultation of accounts without device (protected by optional password)
*Dashboard view of all assets
*Counter values: choice of currency & exchanges
*Send, receive, account balances & history
*Confirmation before sending funds
*On device verification of the receive address
*Faster account synchronization engine
*Easy onboarding for new users
Looks like July 9th and from reading this, it supports the hardware wallets.
A reminder to those that do use Ledger NanoS, that an exploit was found and a PoC released, Ledger I believe has addressed it and there is an update available.
Below are the relevant links:
and from Ledger
Thanks for the heads up. I do have latest firmware.
Ledger Live: https://www.ledgerwallet.com/live
Here is a Comparison of Ada wallets and exchanges which (will) support Ledger.