The phrase "a free option for" is correct and usable in written English.
It can be used when discussing choices or alternatives that do not require payment or cost.
Example: "The app offers a free option for users who want to try it before committing to a subscription."
Alternatives: "a complimentary choice for" or "a no-cost alternative for".
I could have a free option, for a limited level of service, but charge for higher levels of demand".
Since San Francisco has lots of tech-savvy commuters and visitors, it also decided to be the first large city to offer a free option for connecting, and so brought in Google, which will try to fund its network using advertising rather than relying on subscriptions as Earthlink does.The delay and possible derailment of the plan by the Board of Supervisors is therefore frustrating.
There's a free option for groups, or they can buy things like a more white label experience (see top image above), extra storage, etc. for a monthly fee.
Often it is highlighted as a "free" option for feeding a child, but it comes with several costs and challenges.
Norton Family Online is a free option for Windows, Android, and iOS.
We developed R functions for fitting the BSF with a freer option for choosing the parametric number, and illustrated their performance using simulated data generated by four equations (the exponential, logistic, Gompertz, and von Bertalanffy equations), as well as dry weights of six crop species measured in growing seasons.
So while it's useful that Amazon now provides a free option of its own for cross-platform developers, it's not likely to be a best of breed service anytime soon.
There's a free option and a paid option for bands who want to dive deeper into the customization of their so-called 'BandPage'.
Photo Rec is a powerful, free option for most operating systems, but lacks a graphical user interface, which can be intimidating for less advanced users.
Take Me to My Car offers a decent free option for the iPhone.
Another Call Recorder is a good free option for Android users.
