Hi there,
i'm quite unsure about where to save my btc and eth. personally as i travel a lot i will have difficulties using a hardware-wallet, so i was thinking of a kind of mobile version. is there anything you could recommend?
Depending of OS you use in your smarthphone you can choose from 1 to 11 different mobile wallets.I never use any of them,but Electrum and Mycelium are very popular with users of Android OS.If you have the possibility I think you should definitely try them first to see if they meet your needs.Also be sure to always download original version and that your smarthphone is not infected with some malware.
For more info you can check here :
https://bitcoin.org/en/wallets/mobile/android/