Whether you need it for business or personal reasons, The Vault for iPhone and iPad should provide you with all the tools you need to keep your sensitive data completely secure thanks to passcode protection and HTTPS protocol transfers.
If you're currently looking for simple and secure storage of your data then I think this app should suffice just fine, and it's lack of unnecessary gimmicky features makes it perfect for a more formal business-orientated setting.
Making a solid addition to the Business category of the App Store is this tool that will allow you to easily your personal data in a secure and convenient interface, with every being stored locally on your device with no third-party involvement.
Within this app you'll find a range of templates to help you quickly store the data you need making it ideal for financial details, website logins, travel documents, personal notes, and anything else you can think of.
Share Data via HTTPS
The Vault is also well-suited to sharing with others because you can export your data to your desktop computer via Wi-Fi transfer, and this is done over a HTTPS protocol to ensure no one else can get their hands on it.
Of course all of this is on top of basic passcode protection, so you have everything you need to store, secure, and share everything from scans of contracts to financial statements and everything in between.