Best Percent Delay Calculator Apps

217+ iOS apps curated and reviewed

4.7 avg rating
18 free apps
Updated May 2026

Whether you're new to percent delay calculator or looking for an upgrade, our curated collection of 217+ iOS apps has something for everyone. Each app is reviewed and rated by real users, helping you make an informed decision.

Top Picks for Percent Delay Calculator

Percent Delay Calculator#1

Percent Delay Calculator by Overpass Limited

Editor's Choice
🏥 Medical
5.0(5 ratings)
Free
Percent Delay Calculator screenshot 1
Percent Delay Calculator screenshot 2
Percent Delay Calculator screenshot 3

This application helps providers in early childhood special education calculate percentage delay in development to determine eligibility for services. It allows users to assess developmental delays and qualify children for services based on state-specific cut-offs, with a color-coded system based on Alaska's requirements.

Calculator‰#2

Calculator‰ by Tim O's Studios, LLC

Default Calculator
Strong Contender
🔧 Utilities
4.9😊(404K ratings)
FreeAds
Calculator‰ screenshot 1
Calculator‰ screenshot 2

Experience a beautifully designed calculator with large buttons and a clear display for quick and efficient calculations. Try it now to discover the simplicity and ease of use for your everyday arithmetic needs.

What We Love

  • 👍 Easy to use
  • 👍 Large, clear buttons
  • 👍 Accurate calculations
  • 👍 Simple, no-frills design

Room to Improve

  • 🔍 Lack of advanced features
  • 💰 Ads can be intrusive
  • 🔒 Concerns about security/malware
Calculator·#3

Calculator· by Tim O's Studios, LLC

Big Basic Calculator
Worth Considering
🔧 Utilities
4.9😊(33K ratings)
FreeAdsIn-App Purchases
Calculator· screenshot 1
Calculator· screenshot 2
Calculator· screenshot 3
Calculator· screenshot 4
Calculator· screenshot 5

A simple and intuitive calculator app with essential functions like addition, subtraction, multiplication, and more. Customize with multiple color schemes, copy results easily, and use additional functions on iPad. Experience the perfect balance of features and simplicity today!

What We Love

  • 👍 Simple and easy to use
  • 🚀 Quick and responsive
  • 💡 Percentage function works well
  • 👍 Large, clear buttons

Room to Improve

  • 🔋 Frequent ads can be distracting
  • 🐛 Occasional crashes or freezes
  • 🔒 Lack of customization options

More Percent Delay Calculator apps to explore

4
Big Button Calculator Pro Lite
Big Button Calculator Pro Lite
Big Button Calculator Pro Lite
Easy Basic Calculator
Free

Experience the ultimate iOS calculator with big buttons, dual-line display, 18 color themes, and multi-line input for complex equations. Includes convenient gestures like swipe to backspace and clear. Perfect for all your calculating needs!

🔧 Utilities
(13K)
5
Calculator with History +
Calculator with History +
Calculator with History +
No ads & Scientific calculator
Free

A calculator app with a built-in history feature that keeps track of your calculations without any ads. Calculate effortlessly and access your past computations instantly.

💰 Finance
(23K)
6
Calculator for iPad₊
Calculator for iPad₊
Calculator for iPad₊
Basic, Scientific, Plus Calc
Free

A powerful math solver and scientific calculator for iPad and iPhone, featuring advanced functions and quick calculations. Share your results easily and master your business expenses with percentage calculations. Get it now!

🔧 Utilities
(126K)
7
Color Calculator-smart&cute
Color Calculator-smart&cute
Color Calculator-smart&cute
Cute calculator app with theme
Free

A color calculator app that helps users find complementary color schemes for design projects. Simply input a base color and let the app generate harmonious color combinations for your projects. Try it now to elevate your design choices!

🔧 Utilities
(15K)
8
ClevCalc - Calculator
ClevCalc - Calculator
ClevCalc - Calculator
All-In-One Calculator
Free

A comprehensive all-in-one calculator app with features like scientific calculator, unit converter, currency converter, percentage calculator, and more for everyday use. It provides a wide range of calculation tools from basic arithmetic to complex conversions and financial calculations. Try it out now for convenient and efficient calculations!

📊 Productivity
(12K)
9
Calculator +
Calculator +
Calculator +
Scientific Calc Plus Fraction
Free

Experience the award-winning calculator app for iPad and iPhone, offering a free basic and scientific calculator with an elegant design, simple usability, and beautiful interface. Calculate with ease and precision today!

🔧 Utilities
(9.6K)
10
Calculator ∞
Calculator ∞
Calculator ∞
The Best Scientific Calculator
$5.99

A top-rated scientific calculator app on iOS devices offering advanced math functions with a user-friendly interface for users of all levels. Features include step-by-step solutions, math photo solving, and handwriting recognition. Enhance your calculations with this versatile tool.

📚 Education
(6.2K)
11
Calculator Pro Lite
Calculator Pro Lite
Calculator Pro Lite
Best Calculator
Free

A versatile and customizable calculator app offering basic and scientific functions, memory features, history tape, and various layout options. Users can personalize their color themes, access scientific functions, and easily perform complex calculations, all with ad-supported convenience. Explore the app now for a powerful and user-friendly calculation experience!

🔧 Utilities
(3K)
12
OneCalc: All-in-one Calculator
OneCalc: All-in-one Calculator
OneCalc: All-in-one Calculator
Calculates everything. Try it.
Free

A versatile calculator app for iPhone and iPad offering over 40 calculators and unit converters for finance, health, and more. Simplify your calculations with just one app today!

📊 Productivity
(4.8K)
13
Hours Minutes Calculator Lite
Hours Minutes Calculator Lite
Hours Minutes Calculator Lite
by Quackstro
Free

This application helps users calculate hours and minutes quickly and competently. Whether for work, study, or personal use, it simplifies time calculations. Try it now for a hassle-free approach to managing your time effectively!

🔧 Utilities
(2.9K)
14
Sci:Pro Calculator
Sci:Pro Calculator
Sci:Pro Calculator
by Jerry Montgomery
Free

A versatile calculator app with Basic, Scientific, and Programmer modes for iPhone, iPad, and iPod Touch. Easily view history and share results via email or copy. Get precise calculations on-the-go!

🔧 Utilities
(3.6K)
15
Panecal Scientific Calculator
Panecal Scientific Calculator
Panecal Scientific Calculator
For engineers and students
Free

A scientific calculator app designed for engineers and students, offering features like formula display, quick editing, memory functions, and various calculation modes. Improve accuracy and efficiency with easy formula navigation and editing tools. Explore advanced functions for different number systems and mathematical operations.

🔧 Utilities
(1.9K)
16
Calculator⁻
Calculator⁻
Calculator⁻
Best hand calculator
Free

Discover the best hand calculator for all your basic math needs - addition, subtraction, multiplication, division, and more, with customizable features like recording and recalling past calculations and touch sound. Perfect for school children and anyone seeking a simple and efficient calculator solution!

🔧 Utilities
(3.4K)
17
Calculator Smart
Calculator Smart
Calculator Smart
Scientific & Standard Calc
Free

Stay ahead with accurate calculations using Calculator Smart. Easily perform simple or complex computations on your iPhone, Apple Watch, or iPad. Download now for free and experience its stunning interface, standard and scientific modes, with over 30 scientific operations.

🔧 Utilities
(492)
18
Calculator HD Pro
Calculator HD Pro
Calculator HD Pro
Basic & Scientific Calc
$9.99

A powerful calculator app for all your mathematical needs, featuring advanced functions, intuitive interface, and customizable settings. Download now for a seamless calculation experience.

🔧 Utilities
(11K)
19
PCalc Lite
PCalc Lite
PCalc Lite
The Best Calculator
Free

PCalc Lite is the ideal calculator app for scientists, engineers, students, and programmers offering RPN mode, multi-line display, unit conversions, constants, and more. Try it for free on your iPad and upgrade for additional features or themes. Also available on Apple Watch for on-the-go calculations.

🔧 Utilities
(213)
20
Calculator⁼
Calculator⁼
Calculator⁼
Fraction, Scientific Calc +
Free

A handy math assistant for solving basic and scientific calculations intuitively and quickly. Become a math master with this free app!

🔧 Utilities
(357K)