Files: File Manager App

The Moon: Calendar Moon Phases

Weather

iTuner - Chromatic Tuner

Tuner for Guitar Piano Violin

Currency converter: Exchange

Converter for 160+ currencies

Waiter POS Restaurant System

Point of Sale

SBC - Ballistic Calculator app

Extreme Long Range ballistics

The Sun: Sunrise sunset Times

Calendar sunrise sunset

Color converter - RGB

RGB, RGBA, HEX, HSB, CMYK, LAB

Alarm Clock: & Sleep Timer

Utilities

Tone Generator App

from 20 Hz to 20 kHz

E Tuner: Chromatic tuner

Music

KDS for Waiter POS

Kitchen Display System

Voice Recorder - REC App

Utilities

Quantum Mechanics - Theories

Education

ПДР України

Education

Bubble LEVEL - High Accuracy

LEVEL App for iPhone