I've been using Klever wallet for a little bit less than a year now shortly after making an investment on $TRX and $BTT.
I was looking for a mobile wallet to hold these tokens, and ended up investing on $KLV as well, and that ended up bringing a massive return.
Since then, they have improved the wallet multiple times, bringing all sorts of other blockchains to it and an internal swap feature as well.
I never had any issue with it, and as far as I my personal experience goes, this is one of the best crypto wallets out there.