Hi all, I’ve just launched my calculator app on the App Store and would like to get some feedback from you.
Why build another calculator again?
- Can’t find a calculator on iPad that’s free and ad-free and fits my needs.
- Almost all calculators in the market didn’t calculate the percentage as I expected. (I will explain it below)
- I can pack a lot of modernised features to the calculator.
You can get the app for free here:
https://apps.apple.com/app/calcsmos/id1590091618
Some video introductions in my facebook page:
https://www.facebook.com/calcsmos
And website for the app:
https://www.waterworld.com.hk/calcsmos/
Features
Some highlights that I would like to mention compared to other calculators in the market:
- Customisable; you can choose colour, button style, button height, lock the sidebar, etc. It fits for both iPhone and iPad in different screen sizes and modes. It also fits split screen and all multi-tasking modes in iPad very well.
- The calculation will be shown in receipt format so that you can verify the calculation easily. You can also edit any value in the calculation by tapping on the value, or delete a row by swiping left. History is also available and can be accessed easily.
- You can create “Space” for different tasks, you can set a Space to iCloud Sync, so that all calculations will be sync across your iOS device.
- There is something called “Overlay” that adds extra features to the calculator, e.g. tips calculator, split bills, discount, rate convert, unit convert. It even has a price scanner that scans the price tag number to the calculator.
- Lots of modern features; e.g. Sharing, Light/Dark Theme, Copy and Paste, Drag and Drop, Multiple Instances, Today Widget, Home Screen Widget, Lock screen Widget for iOS16.
Percentage
Say I want to buy two items, one is $100 and 5% off, another is $200 and 3% off.
So I want to type: 100 - 5% + 200 - 3% and expect the result.
In some calculators, it will calculate as 100 - 0.05 + 200 - 0.03 that’s totally wrong.
In most calculators, it will calculate as ((100 * 0.95) + 200) * 0.97 = 286.15.
The only calculator that returns the result that I expected is google’s calculator on their website. Interestly, the calculator app in android also gives another result (286.15).
In my calculator, it will calculator as (100 * 0.95) + (200 * 0.97) = 289. I think it makes more sense for daily use.
