App: Solves: Calculator for All
Developer: Oleg Barinov
Genres: Utilities, Productivity

Calculator with percentages, powers and functions. History with comments that is synced across all your devices. Cursor for editing anywhere. Simple interface with dark and light themes and no ads.

There is also an upgrade that adds features such as currency and unit conversion.

Release notes:
Get Solves+ for free for helping translating it into your language! Open the "Other" section of the settings and tap on "Help with Localization".