What is Reddit's opinion of Loan Calculator IQ?

From 3.5 billion Reddit comments

i used this amortization chart app here (just plug in your numbers and you can see for yourself

https://play.google.com/store/apps/details?id=com.handyapps.loancalculator

and if you have a mortgage this app is really useful as well

https://play.google.com/store/apps/details?id=com.drcalculator.android.mortgage