HulloMail calls itself "visual voicemail in the cloud". To say it helps you manage your voicemail more easily is a fair assessment, yet that description really doesn't do the app justice.
The base app is free and with that you can view, play and manage your voicemails. Cleverly, the app can send alerts of missed calls even when your phone is off and there is no network coverage using push notification. One potentially very useful feature is the ability to send a copy of a voicemail to your email. You can't possibly know how useful that particular facility is until you've used it.
There are lots of different in-app purchases which can add a whole gamut of additional extra features. Sharing messages to Evernote, automatically sending all messages to email, replying by SMS and email from within the HulloMail app, recording individual greetings for different callers and more. There's also a full business subscription priced at £3.99 per month or £39.99 per year which adds unlimited cloud storage, sophisticated message searching, voice-to-text transcriptions and support for enterprise message sharing.
OS: Android, iOS