Not Blockchain. Never Blockchain. Web wallets are a poor choice at the best of times, but Blockchain really is the peak of awful wallets. It is buggy, it has numerous critical vulnerabilities, they've been hacked on numerous occasions, their support is legendarily useless, and it doesn't provide many advanced features.

You are going to want to pick a mobile wallet with is both open source and reproducible from the source code. Mycelium and Electrum both fulfill these criteria, as well as being widely used and reputable wallets, and are therefore good choices.