Well, it looks good.... and having the source code out there.... help to give it more credibility. (I hate these wallets with proprietary source code) 
it is also listed on walletscrutiny, cause just having the source code in the open doesn't mean anything. you can't be sure that what you download from the app store is actually what you find in the source code posted in the open. (i have no affiliation with walletscrutiny and never used unstoppable wallet)