Aside the Google APIs, Coinomi was once an open source wallet, but nwt completely gone close source, be it any good reason this was done by the developers, the source codes for Coinomi can no more be known to the public, even if spyware or any other malware has now being included, nobody will know this, be it Coinomi or Trustwallet, non is advisable nor recommended because their is nothing more deadly than close source wallets as they can be the threat in the future for harbouring malware. Like you commented, it may be good for claiming forked coins, but there is nothing better than to get an open source wallet like hardware wallet  that is open source for coin safety.