Best Delay Calculator Apps

209+ iOS apps curated and reviewed

4.7 avg rating
17 free apps
Updated June 2026

Every iPhone needs a few good delay calculator apps. We benchmark 209+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.

Top Picks for Delay Calculator

Tempus - Delay Calculator#1

Tempus - Delay Calculator by Marcos Kohler

Delay & Re-Pitch Calculator
Editor's Choice
🎵 Music
5.0(8 ratings)
Free
Tempus - Delay Calculator screenshot 1
Tempus - Delay Calculator screenshot 2
Tempus - Delay Calculator screenshot 3
Tempus - Delay Calculator screenshot 4

Calculate delay times and sample re-pitch amounts with a tap-tempo metronome. Preview delay sounds and determine BPM changes for your DAW. This tool helps musicians fine-tune audio effects.

Reverb & Delay Calculator#2

Reverb & Delay Calculator by Quentin Hayot

Music production helper
Strong Contender
🎵 Music
5.0(1 ratings)
FreeAdsIn-App Purchases
Reverb & Delay Calculator screenshot 1
Reverb & Delay Calculator screenshot 2

This music production tool helps users find optimal reverb and delay settings. Input your track's tempo to instantly calculate values for pre-delay, decay, total length, and various delay note types. Streamline your audio mixing process with precise calculations.

Calculator with History +#3

Calculator with History + by Beijing Free Calculator Technology Co., Ltd.

No ads & Scientific calculator
Worth Considering
💰 Finance
4.7😊(23K ratings)
FreeIn-App Purchases
Calculator with History + screenshot 1
Calculator with History + screenshot 2
Calculator with History + screenshot 3
Calculator with History + screenshot 4
Calculator with History + screenshot 5
Calculator with History + screenshot 6

This free calculator app offers a fast, ad-free experience with a visual input and calculation history. Customize your experience with various keyboard sounds and colors, and access advanced scientific functions when needed.

What We Love

  • 🚀 Great calculator with history
  • 👍 Easy to use interface
  • 🚀 Responsive and fast
  • 🔒 No ads or subscriptions

Room to Improve

  • 🐛 History deletion issues
  • 🐛 Delayed equal button press
  • 🐛 Calculation errors with certain functions

More Delay Calculator apps to explore

4
Calculator·
Calculator·
Calculator·
Big Basic Calculator
Free

This app offers a straightforward calculation experience, focusing on essential functions without unnecessary complexity. It includes basic arithmetic, percentage calculations, and advanced functions like square root. Users can customize the appearance with multiple color schemes and utilize features like result copying and split-screen multitasking on iPad.

Basic arithmetic operationsPercentage calculationsMultiple color schemes
🔧 Utilities
(33K)
free with in-app purchases
5
Calculator for iPad₊
Calculator for iPad₊
Calculator for iPad₊
Basic, Scientific, Plus Calc
Free

This app offers both basic and advanced scientific calculations with an intuitive interface designed for tablets and phones. It includes features like currency conversion, calculation history, and the ability to share results. An optional premium membership removes ads and provides enhanced support.

Basic & Scientific CalculatorAdvanced Scientific FunctionsLive Currency Converter
🔧 Utilities
(126K)
free with in-app purchases
6
DelayTool: BPM Calculator
DelayTool: BPM Calculator
DelayTool: BPM Calculator
by Joel Perry
$0.99

This application helps musicians and sound engineers calculate precise timing values for musical subdivisions. It automatically updates a table of milliseconds and Hertz based on the entered tempo, ideal for setting up delays and oscillators.

BPM calculatorTempo input and tap tempoAutomatic table updates
🎵 Music
(4)
paid
7
Calculator 3.0
Calculator 3.0
Calculator 3.0
Calculations Simplified
Free

A free, redesigned calculator app offering a simpler, more intuitive experience across Apple devices. Features include customizable themes, advanced scientific functions, and unit conversion, all optimized for various screen sizes and interactions.

Customizable themesScientific calculatorUnit converter
🔧 Utilities
(3.5K)
free
8
Color Calculator-smart&cute
Color Calculator-smart&cute
Color Calculator-smart&cute
Cute calculator app with theme
Free

This app offers a customizable and fast calculator experience with a wide variety of themes. It includes scientific and standard modes, real-time results, and calculation history. Personalize your math with over 60 cute and colorful themes, including animated options.

60+ free cute and colorful themesExclusive dynamic and special themesScientific & Standard calculator modes
🔧 Utilities
(15K)
freemium
9
Percent Delay Calculator
Percent Delay Calculator
Percent Delay Calculator
by Overpass Limited
Free

This tool helps early childhood special education providers calculate developmental percentage delays for service eligibility. It is color-coded based on Alaska's requirements but can be used by any state.

Calculate percentage delayColor-coded for Alaska eligibilityUsable by any state
🏥 Medical
(5)
free
10
Calculator - Free Calculator
Calculator - Free Calculator
Calculator - Free Calculator
by 祥祎 刘
Free

A straightforward and reliable calculator application designed for iPad and iOS 9. It offers a standard calculation experience with a charming piano sound effect and is optimized for high-resolution screens.

Standard calculator functionalityOptimized for iPad & iOS 9High-resolution screen optimization
🔧 Utilities
(1.4K)
free
11
Calculator₊
Calculator₊
Calculator₊
Basic, Scientific, Plus Calc
Free

This app offers a comprehensive suite of calculation tools, including basic, scientific, and unit conversion functions. It features an AI-powered math solver that can solve problems from photos and a dedicated math notes section for jotting down equations and diagrams. Accessibility options like dynamic text size and VoiceOver support are also included.

Basic and scientific calculationsUnit and currency converterAI-powered math solver with photo recognition
🔧 Utilities
(1.7M)
free with in-app purchases
12
Sci:Pro Calculator
Sci:Pro Calculator
Sci:Pro Calculator
by Jerry Montgomery
Free

This app offers a versatile calculator with three distinct modes: Basic, Scientific, and Programmer. It provides a history view, sharing capabilities, and supports various input and output formats. The app is designed for iPhone, iPad, and iPod Touch.

Multi-mode calculator (Basic, Scientific, Programmer)Calculation historyShare results via email
🔧 Utilities
(3.6K)
free
13
Calculator HD++
Calculator HD++
Calculator HD++
by smalltech sarl
Free

This application offers a high-precision calculation engine with a user-friendly interface. It allows for real-time result display as formulas are typed, supports multiple undo actions, and enables easy switching between workspaces. Users can also access persistent history, print calculations via AirPrint, and share history via email.

High precision calculation engineResults displayed while typingMultiple undo functionality
🔧 Utilities
(268)
ad-supported
14
PCalc Lite
PCalc Lite
PCalc Lite
The Best Calculator
Free

This free scientific calculator offers essential features like RPN mode, unit conversions, and multiple undo/redo. It provides a taste of a more powerful version, with optional in-app purchases for expanded functionality.

Optional RPN modeMultiple undo and redoUnit conversions and constants
🔧 Utilities
(213)
free with in-app purchases
15
Calculator Pro Lite
Calculator Pro Lite
Calculator Pro Lite
Best Calculator
Free

A highly customizable calculator app offering a modern interface and extensive features. Personalize themes, button layouts, and visual elements. Track your calculations with a detailed history and access scientific functions.

Customizable themes and colorsDual-line displayCalculation history
🔧 Utilities
(3K)
ad-supported
16
Big Button Calculator Pro Lite
Big Button Calculator Pro Lite
Big Button Calculator Pro Lite
Easy Basic Calculator
Free

A user-friendly calculator app featuring large buttons and customizable colorful backgrounds. It offers a dual-line display, multi-line input for complex equations, and convenient gesture controls for editing and copying.

Large buttonsDual-line display18 color themes
🔧 Utilities
(13K)
ad-supported
17
Calculator⁼
Calculator⁼
Calculator⁼
Fraction, Scientific Calc +
Free

This app offers a clean and intuitive interface for both basic arithmetic and advanced scientific calculations. It includes a history tape to review past computations and supports various mathematical operations, making it suitable for everyday use and complex problem-solving.

Basic & Scientific CalculatorLive Currency ConverterHistory Tape
🔧 Utilities
(357K)
free with in-app purchases
18
PCalc
PCalc
PCalc
The Best Calculator
$9.99

A powerful calculator designed for professionals and students, offering advanced features like RPN mode, multi-line display, and extensive unit conversions. It supports various number systems and includes an Apple Watch app for on-the-go calculations.

Optional RPN modeMulti-line displayExtensive unit conversions
🔧 Utilities
(758)
free with in-app purchases
19
Calculator Pro Elite
Calculator Pro Elite
Calculator Pro Elite
Best Calculator
$9.99

A highly customizable calculator app offering a modern interface and powerful features. Personalize themes, button layouts, and visual elements to your preference. Track and save calculations with a detailed history, and access scientific functions when needed.

Customizable themes with gradients, colors, or photosMultiple button shapes and color customizationDual-line display for input and result
🔧 Utilities
(2K)
free with in-app purchases
20
Simple Calculator.
Simple Calculator.
Simple Calculator.
Basic Casio-style calculator
Free

A straightforward calculator designed for speed and accuracy, mimicking classic pocket calculators. It offers real-world logic, business-focused calculations like cost, sell, and margin, and a clean interface for effortless use.

Real-world logic, no forced order of operationsRunning total displayCost, sell, margin calculations
🔧 Utilities
(1.4K)
ad-supported

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