Anirudh Paytm sends reminders for Insurance premiums automatically once you pay using their platform. They also have a "Payment Reminder" feature through which you can setup reminders manually.
I have my own system wherein I have setup reminders in my calendar for bills (manually).
As for your question about switching from Paytm to Finin... User interface, reminders, expense tracking, etc can be factors. But frankly if you can nail the convenience with the availability of all services (Eg. Paytm is one of the few wallet/payment apps that supported LIC premium payments for a long time - payment of LIC premiums through their website is a big hassle - half the time the site is down) and integration of banks - I like Paytm here as well... their implementation of UPI is the best #IMHO. You get one page through which you can check the balances of all your bank accounts and transfer funds between them in the least number of clicks. The other apps I have seen need a lot of to and fro in their UI for a simple self account transfer or even balance check.
One tidbit... keep your UI accessible by having the control buttons in the bottom of the app so that we get easy thumb access. Makes a world of difference...