Sumi: Notepad Calculator

By Sigit Kuncoro on AppTrack Ninja.

Math notes, currency offline

Sumi is a notepad where every line is a calculation. Write "rent = 2450 EUR" and it keeps the number. Write "rent / 4" on the next line and you get each person's share. I use it for trip budgets, splitting bills with housemates, counting hours for invoices and checking how many days are left until a deadline. It handles currencies, units, time and dates, so you can write things like: hotel = 128 EUR per night hotel × 4 prev + 15% total in usd round up 7.2 h 8 h × 5 days days until 25 dec Rp 150rb × 3 "prev" is the line above and "sum" adds up everything above it. Change one number and the res…

Categories: Utilities, Finance

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