Check our website fitsaas.com and demo and blog https://app.fitsaas.com.
We develop custom software on days. On first day with client, we take the specification and are able to show the client the final interface of their desired app, under our universal interface.
Then on some days we produce a quality server side code and deploy the product for our client on our cloud servers, with security and high availability.
Then becomes a normal SAAS.