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Best Vpd Calculator Apps

250+ iOS apps curated and reviewed

4.3 avg rating
17 free apps
Updated August 2026

Looking for free vpd calculator apps? 17 of our 250+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.

Compare top Vpd Calculator Apps (August 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Photone - Grow Light MeterPhotone - Grow Light MeterFree4.6★ (4.9K)NoYesAug 2026
2Panecal Scientific CalculatorPanecal Scientific CalculatorFree4.8★ (1.9K)YesNoAug 2026
3Calculator ∞Calculator ∞$5.994.7★ (6.3K)NoYesAug 2026
4Sci:Pro CalculatorSci:Pro CalculatorFree4.8★ (3.6K)NoNoAug 2026
5Calculator Pro LiteCalculator Pro LiteFree4.6★ (3K)YesNoAug 2026
6ClevCalc - CalculatorClevCalc - CalculatorFree4.7★ (13K)YesYesAug 2026
7Digits Tape CalculatorDigits Tape Calculator$1.994.8★ (1.1K)NoYesAug 2026
8Loan Calc: Loan EMI CalculatorLoan Calc: Loan EMI CalculatorFree—YesNoJun 2026

Top Picks for Vpd Calculator

Photone - Grow Light Meter#1

Photone - Grow Light Meter by Lightray Innovation GmbH

Perfectly light your plants!
Editor's Choice
🔧 Utilities
4.6😐(4.9K ratings)
FreeIn-App Purchases
Photone - Grow Light Meter screenshot 1
Photone - Grow Light Meter screenshot 2
Photone - Grow Light Meter screenshot 3
Photone - Grow Light Meter screenshot 4
Photone - Grow Light Meter screenshot 5
Photone - Grow Light Meter screenshot 6

This app acts as a professional-grade light meter for plants, measuring PAR, PPFD, DLI, and more using your device's camera. It helps optimize plant lighting by providing accurate readings and in-app guides, with optional advanced features available through purchase.

What We Love

  • 🚀 Accurate readings
  • 💡 Helpful for growing plants
  • 👍 Easy to use
  • 🚀 Saves money compared to expensive meters

Room to Improve

  • 🐛 Inconsistent readings
  • 💰 Expensive in-app purchases
  • 🔒 Requires additional equipment (diffuser) to work properly
Panecal Scientific Calculator#2

Panecal Scientific Calculator by Noriyasu Kutsuzawa

For engineers and students
Strong Contender
🔧 Utilities
4.8😊(1.9K ratings)
FreeAds
Panecal Scientific Calculator screenshot 1
Panecal Scientific Calculator screenshot 2
Panecal Scientific Calculator screenshot 3
Panecal Scientific Calculator screenshot 4

This app functions as a scientific calculator, enabling users to input and edit complex formulas with ease. It supports formula history, variable memory, and various number system conversions for accurate calculations.

What We Love

  • 👍 Great button layout
  • 👍 Intuitive and user-friendly
  • 👍 Powerful scientific functions
  • 👍 Convenient display and history

Room to Improve

  • 🐛 Calculation errors in some cases
  • 🐛 Glitches and crashes reported
  • 🔍 Lack of engineering prefixes
Calculator ∞#3

Calculator ∞ by Incpt.Mobis

The Best Scientific Calculator
Worth Considering
📚 Education
4.7(6.3K ratings)
$5.99In-App Purchases
Calculator ∞ screenshot 1
Calculator ∞ screenshot 2
Calculator ∞ screenshot 3
Calculator ∞ screenshot 4
Calculator ∞ screenshot 5
Calculator ∞ screenshot 6

This advanced calculator app offers a powerful math core and algebra engine for basic to complex calculations. It includes features like step-by-step solutions, handwriting recognition, and 2D graphing, making it suitable for students, engineers, and programmers.

More Vpd Calculator apps to explore

4
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
5
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
6
ClevCalc - Calculator
ClevCalc - Calculator
ClevCalc - Calculator
All-In-One Calculator
Free

This comprehensive calculator app offers a wide range of tools for everyday calculations, from basic arithmetic and scientific functions to unit and currency conversions. It includes specialized calculators for loans, health, fuel costs, GPA, and more, all within a clean and user-friendly interface.

Scientific calculatorUnit converterCurrency converter
📊 Productivity
(13K)
free with in-app purchases
7
Digits Tape Calculator
Digits Tape Calculator
Digits Tape Calculator
The calculator for humans
$1.99

This app offers a calculator with an editable, line-by-line tape history, combining spreadsheet-like functionality with calculator simplicity. Easily correct mistakes, add comments, and share or print your calculations.

Editable line-by-line tape historyCorrect and insert entriesAdd labels and comments
🔧 Utilities
(1.1K)
free with in-app purchases
8
Loan Calc: Loan EMI Calculator
Loan Calc: Loan EMI Calculator
Loan Calc: Loan EMI Calculator
Loan EMI, SIP & Mortgage Tools
Free
💰 Finance
(0)
9
Calculator X — Dev & Graphs
Calculator X — Dev & Graphs
Calculator X — Dev & Graphs
by Ahed Qaraqra
Free
📊 Productivity
(0)
10
Calculator - Multi function
Calculator - Multi function
Calculator - Multi function
Calculator, Notes & Currency
Free
📊 Productivity
(0)
11
Calculator - Basic & NoAds
Calculator - Basic & NoAds
Calculator - Basic & NoAds
Calculations can be saved
Free

Perform essential math operations like addition, subtraction, multiplication, and division without any interruptions. Save your calculations with custom titles for easy retrieval and reuse.

Basic arithmetic operationsAd-free experienceSave calculations with titles
🔧 Utilities
(1)
free
12
FD Calculator - Loan Tool EMI
FD Calculator - Loan Tool EMI
FD Calculator - Loan Tool EMI
Interest Rate on Loan EMI
Free
💰 Finance
(0)
13
Smart - Scientific Calculator
Smart - Scientific Calculator
Smart - Scientific Calculator
by Shreyaskumar Patel
Free

This utility app offers a comprehensive suite of calculators for everyday financial, health, and date-related needs. It includes tools for loans, investments, taxes, health metrics, and unit conversions, along with a math solver.

Basic & Scientific CalculationsLoan & Investment CalculatorsHealth & Date Calculators
🔧 Utilities
(1)
ad-supported
14
Light Meter LM-3000
Light Meter LM-3000
Light Meter LM-3000
Simple & accurate measurement!
Free

Transform your smartphone into a professional light meter. Measure illuminance and color temperature with scientifically validated accuracy, trusted by professionals. Requires a simple diffuser for precise readings.

Measure illuminance (lux/foot-candle)Measure color temperature (Kelvin)Industry-leading accuracy
🔧 Utilities
(2.5K)
free with in-app purchases
15
Calculator: Simple Calculator
Calculator: Simple Calculator
Calculator: Simple Calculator
by Bhaskar Rao
Free
🔧 Utilities
(0)
16
Percentage Calculator %: Tax
Percentage Calculator %: Tax
Percentage Calculator %: Tax
Sale Tax Percentage Calculator
Free
🔧 Utilities
(0)
17
Calculator - Cal C.
Calculator - Cal C.
Calculator - Cal C.
Scientific, Finance, Currency
Free
🔧 Utilities
(0)
18
Loan Cal: Easy EMI Calculator
Loan Cal: Easy EMI Calculator
Loan Cal: Easy EMI Calculator
Easy Loan EMI Calculator
Free
💰 Finance
(0)
19
Calculator - Unlimited
Calculator - Unlimited
Calculator - Unlimited
No ads, Unlimited
$0.99
🔧 Utilities
(0)
20
Calculator - 15 Calculators
Calculator - 15 Calculators
Calculator - 15 Calculators
Calculator for iPhone
Free

This app offers a comprehensive suite of 15 calculators for everyday and scientific needs. Easily perform basic arithmetic, complex scientific functions, and specialized calculations like sales tax, age, and loan payments. It also includes a robust unit converter for various measurements.

15 specialized calculatorsScientific calculation functionsUnit converter for length, area, volume, and more
🔧 Utilities
(18)
free with in-app purchases

FAQ about Vpd Calculator

What are the best vpd calculator apps for iPhone?
Photone - Grow Light Meter tops our vpd calculator apps ranking as of August 2026, with a 4.6-star average from 4.9K App Store ratings, and it's free to download.
Yes — 17 of the top vpd calculator apps we rank are free to download, including Photone - Grow Light Meter and Panecal Scientific Calculator.
Photone - Grow Light Meter has no ads and offers in-app purchases, according to its App Store listing as of August 2026.
We track 250+ vpd calculator apps on the iOS App Store as of August 2026, ranked by rating, recency, and analysis of real user reviews.
Photone is a mobile application that functions as a highly accurate light meter for plants. It uses your device's camera to measure various light metrics such as PAR, PPFD, DLI, lux, foot-candles, and color temperature (kelvin). This data helps users understand and optimize the lighting conditions for their plants.
Key features include industry-leading accuracy comparable to professional PAR sensors, pre-calibration for your specific device, and excellent low light sensitivity. It also offers in-app guides, light source selection for different grow lights, and a hands-free 'read aloud' function. Some advanced features like Extended PAR and underwater measurement modes require an in-app purchase.

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