Patient Information App for Doctors

Patient Information App for Doctors - student project

Product: Medical app for doctors


A web app that allows doctors to record patients, their visits, medicines administered & schedule appointments. Doctors can sign up for a free account with limited features or pay for a premium account to access all the features.


Product details:


A way for doctors to record patients personal details like (Basic personal details, blood group & other useful medical information)

A way for doctors to schedule appointments and to keep a record of visits, notes & outcomes

A way for doctors to record medicines administered to patients

Let's say this is a paid app monthly with a Free and Premium plan where the premium plan offers more features at $20 per doctor with unlimited patients.


Questions that come to mind

  • How do I know my app is benefiting doctors with these goals?
  • What measurement will most accurately tell this story?
  • How would the doctors best use this app?
  • What other features can I provide for Premium users to give the most value but also constrain the cost of upkeep for a potentially unlimited number of patients?
  • Is there a max number of patients for the Free plan?
  • How does the doctor’s network play a role in getting this product implemented?
  • Is there a time limit to using the free plan?



  • This web app is used by a specific network, let’s call it Doctor’s Network, located mainly in the city of Detroit. 
  • There are many different types of doctors in this network, but I will focus on general practitioners (family or individual doctors). This will keep the type of information that will be recorded more or less close to each other.
  • The free plan allows doctors to record some basic information for 100 patients.
  • The free plan lasts for 3 months.This will give them enough time for doctor’s offices to try out the service and see how they like it.
  • The premium plan allows unlimited numbers of patients and more features


What would the vanity metrics look like? Can you give at least 3 examples?

  • # of installations/users
    • Assumes that we are doing well (or not) based on the demand
  • % of growth
    • Assumes that the rate of installations directly impact the demand or need for the service
  • # of free vs. premium
    • Assumes more premium members compared to free members mean that the app is doing well. However we would need more information.


What would success metrics look like? Can you give at least 3 examples?

  • % of free users converting to premium
    • This tells us that there is something the users liked that they’re willing to pay more. The goal is to find out what made them convert
  • # of patients for a specific doctor, free vs premium
    • This can tell me which doctor is using our services more or less
  • # of additional information category added for each patient for premium users
    • Assuming that premium users (doctors) are paying more to input more information for each user, I want to know what other information they are adding to best tailor these groups of doctors.
  • # of clicks on a certain parts of the premium sign-up page
    • I want to know whether it is easy to navigate through this part for users


Can you calculate at least one example from a SAAS metric?

  • CRR (retention)
    • Customer retention rate is the rate at which you keep the number of old customers (in this case doctors) compared to the churn rate (which is the amount of paying customers that is not paying or using your service any more)
    • In this case, I’m calculating retention rates for Premium users, let’s say at the end of the first quarter
  • Retention Rate = ((E-N)/S) x 100
    •  E = Number of customers at end of the period.
    •  N = Number of customers acquired during the period.
    •  S = Number of customers at the start of the period.
    • The goal is to shoot for 100% retention rate, which means you’re not losing any old customers.
  • Example: Let’s say E = 30, N = 10, S = 40
    • ((30-10)/40) x 100 = 50%
    • Here, we started with 40 doctors and ended the quarter with 30 doctors. Out of that 30 doctors however, 10 were new ones that signed up. That means only 20 of the original 40 doctors were old customers, so that is a 50% retention rate.