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App Store Apps > Utilities > JustPercent: 3s Easy Calc
JustPercent: 3s Easy Calc icon

JustPercent: 3s Easy Calc

by DONGSOO LEE · Utilities · Free
On the App Store since May 2026 · Data updated 2026-11-05

JustPercent: 3s Easy Calc is made and published by DONGSOO LEE. AppBrain is an independent app data site and isn't affiliated with DONGSOO LEE. The app name, icon, screenshots and description belong to DONGSOO LEE and are shown as published on the App Store.

AppBrain's verdict

Last updated
October 22, 2026
Size
30.0 MB
Official page on the App Store

User feedback

Ratings and reviews on the App Store

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Store listing

By DONGSOO LEE, from the App Store
JustPercent: 3s Easy Calc Screenshot 1 of 1
Screenshots by DONGSOO LEE, from the the App Store listing
Description by DONGSOO LEE Written by the developer, not by AppBrain. Click to read.
"Confused by percentages? Stop struggling with math. Get your answers in just 3 seconds with JustPercent!"
We made this app for everyone who finds regular calculators too complicated. No math formulas, no stress. Just 3 simple tools you’ll use every day.
■ 3 Simple Features for Everyone
1. "How much is the discount?" (Percentage)
• Shopping for clothes? Find out how much 15% off of a $30.00 item is instantly.
• Just enter the total and the percent. Done in 3 seconds!
2. "Add or Subtract?" (Increase/Decrease)
• Getting a 5% raise on your salary?
• Want to add a 10% tip to your $50.00 dinner bill?
• Just use the Plus(+) and Minus(-) buttons for a quick answer.
3. "What's the difference?" (Change Rate)
• Lost weight from 70kg to 65kg? See what percentage you lost.
• Stocks went from $5,000 to $6,000? Check your profit rate automatically.
• Just enter the Old and New values to see the result.
■ Why JustPercent?
• Super Simple: We use easy words like 'Total' and 'Old/New' instead of hard math terms.
• Instant Results: No need to hit an 'Equal' button. The result appears as you type.
• Clean Design: Big numbers and clear layouts. Perfect for all ages.
• Truly Global: Supports English, Korean, Japanese, Chinese, Spanish, French, Hindi, and more!
From students and shoppers to workers and seniors! Stop worrying about numbers. Let JustPercent do the work and save your time.
Official page on the App Store

Safety and technology

Found in the app by AppBrain
Price
Free
App size
30.0 MB
Content rating
Everyone

Technologies used by JustPercent: 3s Easy Calc

Releases

Updates seen on the App Store
Version
1.0.3
Launched
May 2026

No changelog data

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Rankings

App Store top charts

App Store Rankings for JustPercent: 3s Easy Calc

This app is not ranked

About the app and developer

About JustPercent: 3s Easy Calc

JustPercent: 3s Easy Calc is an utilities app developed by DONGSOO LEE.

User Ratings

The app has no ratings yet.

App Information

JustPercent: 3s Easy Calc is freely available from the App Store. The app size is 30.02 MB. The latest version available is 1.0.3. The last update was on October 22, 2026.

Technical Requirements

The app has a content rating of Everyone. The app has been available on the App Store since May 2026.

Developer information for DONGSOO LEE

DONGSOO LEE

Address:

Frequently asked questions about JustPercent: 3s Easy Calc

Is JustPercent: 3s Easy Calc free?

Yes. JustPercent: 3s Easy Calc is free on the App Store.

Is JustPercent: 3s Easy Calc still available?

Yes. JustPercent: 3s Easy Calc is on the App Store, and the last update we saw was on October 22, 2026.

How large is JustPercent: 3s Easy Calc?

JustPercent: 3s Easy Calc is 30.02 MB.

Is JustPercent: 3s Easy Calc suitable for children?

App Store rates the content of JustPercent: 3s Easy Calc as suitable for everyone.

Who made JustPercent: 3s Easy Calc?

JustPercent: 3s Easy Calc was developed by DONGSOO LEE. It is listed in the utilities category on the App Store.

What are the best alternatives to JustPercent: 3s Easy Calc?

People looking at JustPercent: 3s Easy Calc also look at these utilities apps: GearCalc Pro, Gear Ratio Calculator & RPM, Textile Calculator: Yarn & GSM, 4K MAESTRO Total Control, Watch Gear Calculator.

Share JustPercent: 3s Easy Calc

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