About the App
EQ7 is a smart, all-in-one calculator that combines everyday math, scientific and percentage tools, currency conversion and much more in one simple, easy-to-use app.
Why was EQ7 created?
The idea is simple: one calculator instead of many, built for speed, clarity and everyday use.
- •Fast everyday calculations
- •Scientific tools such as square root, powers and parentheses
- •Easy percentage calculations
- •Currency conversion and live rates
- •Notes and calculation history
- •Simple, clear and quick to use
- •Works as an installable app (PWA) on different devices
Explaining the App Sections
General Calculator
The main calculator for everyday operations: add, subtract, multiply and divide.
Example: 12 + 7 = 19.
Scientific Tools
Tap "Scientific" to use the square root, square and parentheses buttons inside the same calculator.
Example: √9 = 3, 2^3 = 8.
Percentage Calculator
Quickly work out a percentage of an amount without extra steps.
Example: 15% of 200 = 30.
History
EQ7 remembers what you calculated in the last 24 hours so you can review or share it.
Notes
Save quick notes, organize them in folders, and edit them in a full-screen editor.
Currency Tools
Search currencies, see live rates, convert between currencies, use a custom rate, and keep your favorites.
Settings
Change the language, the theme and the sound feedback exactly how you like.
How to Use the Calculator
0–9Tap to type digits.
+Adds the next number.
−Subtracts the next number.
×Multiplies by the next number.
÷Divides by the next number.
=Shows the result.
ACClears everything and starts fresh.
⌫Deletes the last digit you typed.
.Adds a decimal point.
SciScientific / Percentage: switches the extra tools on and off.
🔊Speaks the current result aloud.
Settings
Language: switches the whole app between the available languages.
Theme: choose Dark, Light or Violet appearance.
App Sounds: the master switch for sound and haptic feedback.
When App Sounds is ON, button sound and haptics are allowed. Turn it OFF to silence that feedback, and ON again to allow it.
Speech/TTS is separate from App Sounds and is not turned off by App Sounds.
Currency Converter
Pick the currency you have (From) and the one you want (To), then type an amount.
Use the swap button to reverse the two currencies.
Use the star to mark a currency as a favorite, and open Favorite Currencies from the currency menu.
Convert at Custom Rate lets you enter your own exchange rate.
Live prices come from the online service; if it is unavailable, cached rates may be used.
Install & Offline
You can install EQ7 as an app on supported devices.
Some features work offline using stored resources, but live currency rates and app updates need an internet connection.
Why Use EQ7?
- •All-in-one calculator
- •Fast everyday calculations
- •Scientific and percentage tools
- •Currency conversion
- •History and notes
- •Multi-language interface
- •Responsive design and PWA support
Languages
EQ7 is fully translated. Choose your language in the top bar or in Settings, and the whole app — including this help page — updates instantly.