I have never downloaded wallet apps in adroi or ios, because I never trust their security, anyone can upload apps to receive advertising money, if you can create Get a few apps or games, one day you can upload adroi or ios to thousands of applications to receive advertising money from downloaders.
I thought that Apple especially used to be quite picky on which apps they allowed to be added in the App Store, I guess their system isn't 100% waterproof.
Also, how exactly does an App creator receive advertising money from someone that downloads their app? This all sounds quite confusing.
The most popular Bitcoin electronic wallet today is Blockchain. It is highly appreciated and has the highest reliability. I only use it when dealing.
As others have stated, not only has it had huge security issues in the past ( One of the reasons it can't be found on Bitcoin.org), you're also missing out on a lot of features when using Blockchain.info in comparison to Electrum or Bitcoin core.
Eg; you won't be able to use Replace-By-fee if your funds get "stuck" due to low fees, or CPFP. Exporting keys out of their wallet is also quite difficult.