"providers are able to make apps easily available, expanding access to a huge range of tools that help speed up business and increase efficiencies in adviser firms." "
In second place were the apps of pension, investment and insurance providers, followed by cash flow modelling tools.
Risk profiling and email tools completed the top five.
The iO Store launched in January 2018 and enables new software partners and other providers to publish their functionality as integrated offerings that can be quickly and easily installed by users of Intelligent Office.
Nick Eatock, CEO and chairman of Intelliflo, commented: "The iO Store has made accessing integrations simple and quick and over 8,000 have already been installed by users of Intelligent Office.
"Through the use of open APIs, service providers are able to make apps easily available, expanding access to a huge range of tools that help speed up business and increase efficiencies in adviser firms."