The phrase "add on to the software" is correct and usable in written English.
It can be used when discussing enhancements, features, or extensions that can be incorporated into existing software.
Example: "We plan to add on to the software by introducing new functionalities that will improve user experience."
Alternatives: "extend the software" or "enhance the software."
As it invited more clients to try out its service, the founders discovered that the aspect of 10sheet's service that clients valued most was the human interaction — so much so that the founders changed their model and put the live bookkeeper front and center, rather than as an add-on to the software.
This is a result of Fell resisting stave-like composition, instead using Max/MSP, a programming language that allows users to develop and share their own add-ons to the software.
Hashicorp will initially offer downloadable add-ons to the software for enterprise customers.
This will add on to the complexity of software systems, systems interconnectedness, and the value of software becomes more intrinsic.
Instead of building a turbine add-on to the phone, his team developed software that listens for acoustic features, such as resonance, that result from air being expelled through the trachea and past the vocal cords.
The developed simulation software is an add-on to the finite element flow and transport modeling tool FEFLOW (Zheng [2007]; Diersch et al. [2011a, b]).
The Icon is the first earpiece with software you can modify or add on to, which opens up certain possibilities.
Novell will sell companies the software for managing MeCards as an add-on to its Novell Directory Services software.
Raven SSL module is an add-on to Apache server software and provides secure connections to companies' web sites, especially for e-commerce.
Though financial details have yet to be announced, customers will be paying Comcast for DVR service, and then, if they choose to add on the TiVo software with features like WishList and remote programming, Comcast will likely pay TiVo a small fee for each subscriber.
Every layer of software added on to make your system administration "easier" actually adds more methods for crackers to gain access to your machine and also reduces performance.
