Best Injection Calculator Apps

228+ iOS apps curated and reviewed

4.6 avg rating
16 free apps
Updated July 2026

Every iPhone needs a few good injection calculator apps. We benchmark 228+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.

Compare top Injection Calculator Apps (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Peptide Calculator: PepCalcPeptide Calculator: PepCalcFree5.0★ (9)NoNoJul 2026
2NjectNject$4.994.0★ (124)NoNoJul 2026
3Peptide Calculator: DoseRxPeptide Calculator: DoseRxFree4.8★ (31)NoNoJul 2026
4NurseCalcsNurseCalcsFree4.0★ (4)NoNoJul 2026
5Calculator ∞Calculator ∞$5.994.7★ (6.2K)NoYesJul 2026
6Calculator #Calculator #Free4.6★ (36K)YesYesJul 2026
7Calculator for iPad₊Calculator for iPad₊Free4.5★ (126K)YesYesJul 2026
8Calculator for iPad!Calculator for iPad!Free4.7★ (60K)NoNoJul 2026

Top Picks for Injection Calculator

Peptide Calculator: PepCalc#1

Peptide Calculator: PepCalc by David Dzeveckij

Dosage & Reconstitution Tool
Editor's Choice
🏥 Medical
5.0(9 ratings)
Free
Peptide Calculator: PepCalc screenshot 1
Peptide Calculator: PepCalc screenshot 2
Peptide Calculator: PepCalc screenshot 3

This tool simplifies peptide dosage and reconstitution calculations. It accurately determines injection volumes and the correct amount of water for mixing, converting results to insulin syringe units. Designed for researchers and wellness enthusiasts, it ensures precise and confident peptide administration.

Nject#2

Nject by Keaton Benning, LLC

Injectable Information Center
Strong Contender
🏥 Medical
4.0😐(124 ratings)
$4.99
#11in Medical
Nject screenshot 1
Nject screenshot 2
Nject screenshot 3
Nject screenshot 4
Nject screenshot 5

This app serves as a comprehensive resource for aesthetic professionals. It offers tools for dilution calculations, facilitates partnerships, and provides a live forum with experts. Users can also find assistance with vascular occlusion and access other valuable information.

What We Love

  • 👍 User-friendly and simple interface
  • 🎯 Accurate dosing calculations for toxin injections
  • 📱 Visual syringe markings aid learning
  • 🚀 Quick and efficient dosage conversions

Room to Improve

  • 🐛 App crashes when selecting syringes
  • 🐛 Syringe dropdown menu shows 'no data' or won't populate
  • 🐛 Screen doesn't scroll to access calculate button
Peptide Calculator: DoseRx#3

Peptide Calculator: DoseRx by Arturo Gomez

Dose & Reconstitution Tracker
Worth Considering
🏥 Medical
4.8(31 ratings)
Free
Peptide Calculator: DoseRx screenshot 1
Peptide Calculator: DoseRx screenshot 2
Peptide Calculator: DoseRx screenshot 3

This app quickly calculates peptide draw volumes and insulin syringe units. It works offline, requiring no account, and provides clear results for various vial sizes and water amounts. It's designed for informational purposes only, with a strong disclaimer to consult medical professionals.

More Injection Calculator apps to explore

4
NurseCalcs
NurseCalcs
NurseCalcs
Calculations for Nurses
Free

This utility app helps nurses perform essential unit conversions for medication dosages. It quickly calculates the correct amount of medication to draw based on patient weight and available concentration.

Unit conversions for nursingCalculate medication dosageBased on mg per kg
🔧 Utilities
(4)
free
5
Calculator ∞
Calculator ∞
Calculator ∞
The Best Scientific Calculator
$5.99

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.

Step-by-step solution hintsMath Photos SolverHandwriting Recognition
📚 Education
(6.2K)
free with in-app purchases
6
Calculator #
Calculator #
Calculator #
Scientific Calculator
Free

This multi-function calculator offers basic to advanced scientific and algebraic computations. It includes features like handwriting recognition, equation solvers, and 2D graphing, making it suitable for students and professionals. In-app purchases unlock advanced capabilities.

Math Photos SolverHandwriting RecognitionAI Math Problem Solver
🔧 Utilities
(36K)
free with in-app purchases
7
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
8
Calculator for iPad!
Calculator for iPad!
Calculator for iPad!
Basic & Scientific Calculator
Free

This app offers both basic and scientific calculation modes with over 30 scientific operations. It allows for customization of the app's appearance and includes features for note-taking, drawing, and viewing calculation history. It supports high accuracy calculations and nested parentheses.

Basic and scientific calculator modesOver 30 scientific operationsCustomizable appearance (iPad)
🔧 Utilities
(60K)
free
9
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
10
Medication & Injection Tracker
Medication & Injection Tracker
Medication & Injection Tracker
Pill Reminder & Meds schedule
Free

This app helps users manage medical injection schedules, ensuring timely administration. It supports multiple medications and schedules, tracks injection zones, and provides customizable reminders. Users can also monitor medication inventory and view a history of administrations.

Multiple medication supportMultiple schedules supportInjection zone rotation
🏥 Medical
(430)
free with in-app purchases
11
Calculator with History +
Calculator with History +
Calculator with History +
No ads & Scientific calculator
Free

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.

Ad-free experienceCalculation historyVisual input
💰 Finance
(23K)
free with in-app purchases
12
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
(12K)
free with in-app purchases
13
Calculator with History Tape
Calculator with History Tape
Calculator with History Tape
No Ads Calculator with Memory
Free

This app provides a straightforward calculator experience with a comprehensive history log of all your computations. Customize the keyboard, display, and history records to suit your needs. Easily add annotations and titles to past calculations for better organization.

History record functionDisplay input equationAdjustable keyboard size and font
📊 Productivity
(3.2K)
free with in-app purchases
14
Panecal Scientific Calculator
Panecal Scientific Calculator
Panecal Scientific Calculator
For engineers and students
Free

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.

Formula editing with cursor and swipeReuse past formulasVariable memory for calculations
🔧 Utilities
(1.9K)
ad-supported
15
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
16
Scientific Calculator Plus 991
Scientific Calculator Plus 991
Scientific Calculator Plus 991
Designed for math calculator
Free

This app is a powerful scientific calculator with graphing capabilities, a formula library, and a unit converter. It offers natural display input, advanced math functions for algebra, calculus, and statistics, and supports various number bases and formats.

Natural display inputGraphing moduleFormula library
📚 Education
(12K)
free with in-app purchases
17
GraphNCalc83
GraphNCalc83
GraphNCalc83
Graphing calculator
$12.99

This app offers a powerful graphing calculator experience with touch-based input for enhanced interaction. It supports natural textbook notation, advanced math functions, and various plotting capabilities. Users can also utilize its programming features and built-in tools like unit conversion and a periodic table.

Touch-based graphing and editingNatural textbook notation inputAdvanced math and statistical functions
📚 Education
(3.8K)
paid
18
Calculator⁻
Calculator⁻
Calculator⁻
Best hand calculator
Free

A straightforward calculator app designed for simplicity, offering basic arithmetic operations and percentage calculations. It allows users to record and recall past results, customize colors, and enable touch sounds for a personalized experience.

Basic arithmetic operationsPercentage calculationsRecord and recall results
🔧 Utilities
(3.4K)
ad-supported
19
Calculator +
Calculator +
Calculator +
Scientific Calc Plus Fraction
Free

This app offers a free basic and scientific calculator with an intuitive interface. It supports fractions, percentages, and advanced editing. Optional upgrades provide specialized calculators for fractions with units, polynomial and linear equation solving, graphing, and geometric shapes.

Free basic and scientific calculatorIntuitive interface with equation and result displayFraction and percent support
🔧 Utilities
(9.6K)
free with in-app purchases
20
Calculator!
Calculator!
Calculator!
by 7th Gear
$0.99

This app offers a versatile calculator experience with both standard and scientific modes. Customize its appearance, use it in any orientation, and access additional tools like a notes tab and calculation history. It's designed for students and professionals needing accurate calculations.

Standard and scientific calculator modesCustomizable look (iPad only)Portrait and landscape orientation
🔧 Utilities
(4.2K)
free with in-app purchases

FAQ about Injection Calculator

What are the best injection calculator apps for iPhone?
Peptide Calculator: PepCalc tops our injection calculator apps ranking as of July 2026, with a 5.0-star average from 9 App Store ratings, and it's free to download.
Yes — 16 of the top injection calculator apps we rank are free to download, including Peptide Calculator: PepCalc and Peptide Calculator: DoseRx.
Peptide Calculator: PepCalc has no ads and has no in-app purchases, according to its App Store listing as of July 2026.
We track 228+ injection calculator apps on the iOS App Store as of July 2026, ranked by rating, recency, and analysis of real user reviews.
PepCalc is a dedicated tool for calculating accurate peptide dosages and reconstitution volumes. It helps users determine precise injection amounts and the correct amount of water for mixing, ensuring confidence in peptide administration.
To calculate dosage, you input the desired dose (mcg or mg), the total peptide amount in the vial, and the reconstitution volume. PepCalc then instantly provides the result in both mL and insulin syringe units.