Karl's Mortgage Calculator Pro

Dr Karl Jeacle

About this app

This is the Pro version of Karl's Mortgage Calculator. The only change from the free version is that the adverts have been removed.

Calculate mortgage payments given principal, interest and term. Reverse calculate any one variable given the other three.

Enter a down payment amount or percentage and let the calculator show how large a mortgage you require.

See how the monthly payment changes when you factor in additional monthly or annual loan costs such as PMI, HOA, taxes and insurance.

The calculator supports Fixed and Adjustable Rate Mortgages (ARM) loans with up to five changes in interest rates. Interest-only mortgages loans are also supported.

You can pay off your mortgage early with extra payments. Add one-off, monthly and annual extra payments. Choose up to six additional extra payment amounts and payment periods and the calculator will show how much money you can save on the loan.

Choose from weekly to annual loan payments and adjust the compounding period from daily through annual periods. The calculator supports Canadian mortgages along with UK annual rest mortgages.

Multiple rounding options on loan calculations are also available. Choose between no rounding, round half up, half down, to even, to ceiling and to floor.

The calculator also supports the input and display of multiple currencies.

Ratings and reviews

Liked the free version so much that I bought it. Besides no ads (which honestly I don't recall ever seeing any of in the free version), another unmentioned plus the the $1.99 version is it takes up a LOT less space, 2.88 MB versus just under 18 MB for the free version. That's probably due to the ads. Two bucks is a no-brainer.

I don't write reviews, I had to for this app. There had to be a ton of work put into this calculator, it matches my bank perfectly and being able to select mortgage types for each country should make everyone who buys this very happy. I bought it primarily to see the impact of extra payments to pay down mortgage early. Thanks for this app, it was exactly what I needed.

The problem with this app is when making "extra payment". It does not calculate the new balance when the interest rate changes. I made two loan account, one with extra payment and one without. For example, I made a $25000 extra payment in January then change the interst rate for April. The total payment for May should be lower then the account with no extra payment. Unfortunately, the total payment for both account are the same weather you put extra money or not.

What’s new

4.0.1
- Better screen layouts
- Per-app language prefs
- Updated CMHC rates
- Reduced app size
- Tested on Android 16
- Minor fixes