Best Cylinder Duration Apps

219+ iOS apps curated and reviewed

4.4 avg rating
19 free apps
Updated July 2026

The best cylinder duration apps on iPhone average 4.4โ˜… across 219+ titles โ€” we've ranked them by what real users actually keep on their phones. Updated July 2026.

Top Picks for Cylinder Duration

MDCalc Medical Calculator#2

MDCalc Medical Calculator by MD Aware, LLC

Clinical Decision Support
Strong Contender
๐Ÿฅ Medical
4.9๐Ÿ˜Š(51K ratings)
Free
MDCalc Medical Calculator screenshot 1
MDCalc Medical Calculator screenshot 2
MDCalc Medical Calculator screenshot 3
MDCalc Medical Calculator screenshot 4
MDCalc Medical Calculator screenshot 5

This app provides over 900 evidence-based medical calculators, risk scores, and clinical tools for healthcare professionals. It offers offline functionality, expert insights, and CME tracking to support patient care at the bedside. Tools are developed and validated by board-certified physicians.

What We Love

  • โญ Excellent resource
  • ๐Ÿ” Helpful and accurate
  • ๐Ÿ”ฅ Essential for clinical practice
  • ๐Ÿค– Useful for medical students and residents

Room to Improve

  • ๐Ÿ› Crashes and bugs after updates
  • ๐Ÿ”’ Mandatory login/registration issues
  • ๐Ÿ“ฑ Poor user experience on mobile devices
Calculate by QxMD#3

Calculate by QxMD by WebMD Health Corporation

Medical Calculator
Worth Considering
๐Ÿฅ Medical
4.8๐Ÿ˜Š(5.1K ratings)
FreeAds
Calculate by QxMD screenshot 1
Calculate by QxMD screenshot 2
Calculate by QxMD screenshot 3
Calculate by QxMD screenshot 4
Calculate by QxMD screenshot 5

This clinical calculator and decision support tool offers over 200 medical calculators and tools for diagnosis, treatment, and prognosis. It adapts to your practice and provides detailed references, integrating with PubMed and Read by QxMD.

What We Love

  • โญ Excellent app
  • ๐Ÿ“‹ Comprehensive set of calculators
  • ๐Ÿ” Helpful references and explanations
  • ๐Ÿ”ง Useful for daily practice

Room to Improve

  • ๐Ÿ› App freezes or crashes
  • ๐Ÿ” Some calculators not working
  • ๐Ÿ”‘ Repeated login requests

More Cylinder Duration apps to explore

4
Blood Oxygen Level
Blood Oxygen Level
Blood Oxygen Level
Record pulse and oxygen level
Free

Easily record your daily pulse and blood oxygen levels. Track your health statistics over time with simple data entry and clear visualizations. Requires an external device like a pulse oximeter or smartwatch for measurements.

Record pulse measurementsRecord blood oxygen levelsDaily measurement tracking
๐Ÿฅ Medical
(2K)
ad-supported
5
Inogen Connect Portable Oxygen
Inogen Connect Portable Oxygen
Inogen Connect Portable Oxygen
by Inogen, Inc.
Free

Monitor your portable oxygen concentrator's battery life, settings, and receive important updates. Access helpful videos and troubleshooting information 24/7, all from your mobile device.

Real-time statsBattery life monitoringCurrent settings display
๐Ÿฅ Medical
(266)
free
6
Hours Minutes Calculator Lite
Hours Minutes Calculator Lite
Hours Minutes Calculator Lite
by Quackstro
Free

Easily calculate the difference between two times or add/subtract durations. This utility app helps manage time calculations for various purposes.

Add time durationsSubtract time durationsCalculate time differences
๐Ÿ”ง Utilities
(2.9K)
ad-supported
7
Blood Oxygen App
Blood Oxygen App
Blood Oxygen App
SpO2 Level MonitorใƒปHeart Rate
Free

Monitor blood oxygen levels and heart rate using your phone's camera or by syncing with your Apple Watch. Track vital signs, share data with your doctor, and access curated health articles. Includes breathing exercises and sleep reports.

Blood oxygen monitoringHeart rate estimation via cameraApple Watch sync
๐Ÿฅ Medical
(31K)
freemium
8
Age Calculator Original
Age Calculator Original
Age Calculator Original
Calculate Chronological Age
Free

Calculate your precise age in various units of time, from years down to seconds. Save ages, find remaining time until your next birthday, and use it for various counting needs like birthdays or pets.

Calculate age in multiple time unitsSave ages with namesEmail calculated results
๐ŸŒŸ Lifestyle
(78)
free
9
Blood Pressure Log, Heart Rate
Blood Pressure Log, Heart Rate
Blood Pressure Log, Heart Rate
Pulse & Stress Analyzer, HRV
Free

Monitor and analyze your heart rate, blood pressure, stress, and oxygen levels. Track trends, gain insights into your wellbeing, and export your data. Receive daily reminders to stay consistent with your health monitoring.

Heart Rate Measurement & AnalysisBlood Pressure LogStress & Energy Tracking
๐ŸŒŸ Lifestyle
(23K)
free with in-app purchases
10
iDie
iDie
iDie
by Joseph Kumph
Free

Calculate your remaining lifespan and track your time with a simple, free tool. Use your estimated days, hours, and minutes to prioritize what truly matters.

Life expectancy calculationProgress timerTime management tool
๐ŸŽฌ Entertainment
(22K)
free
11
Days + Date + Time Calculator
Days + Date + Time Calculator
Days + Date + Time Calculator
Days Between Two Dates
Free

Calculate the duration between two dates and times. This tool helps you find the exact number of days, hours, and minutes between any two points in time.

Calculate days between datesCalculate duration between dates and timesCalculate duration between times
๐Ÿ“Š Productivity
(795)
ad-supported
12
Oxiline
Oxiline
Oxiline
Visualize Your Health Journey
Free

This app connects to health devices to visualize, track, and export your health measurements. It provides real-time data visualization and a comprehensive overview of your health metrics, helping you monitor progress and share data with healthcare providers.

Bluetooth device integrationReal-time data visualizationComprehensive health overview
๐Ÿ’ช Health & Fitness
(4.8K)
free
13
Microlife Connected Health+ US
Microlife Connected Health+ US
Microlife Connected Health+ US
by Microlife
Free

Manage your personal health by tracking readings from connected Microlife devices like blood pressure monitors and thermometers. Set personal targets, reminders, and generate data summary reports to maintain a healthier lifestyle. Easily review trends, add notes, and share your health data with family or doctors.

Transfer measurement data via BluetoothReview measurement trends and entriesAdd notes with text, photo, or audio
๐Ÿ’ช Health & Fitness
(2K)
free
14
TimeCalc: Time Calculator
TimeCalc: Time Calculator
TimeCalc: Time Calculator
Working hours, between & more
Free

This app accurately calculates time-related tasks, including working hours, durations between dates, and age. It offers a user-friendly interface with dark mode and offline functionality, allowing for easy time management for work and personal life.

Calculate working hoursCalculate time between two pointsAdd and subtract time
๐Ÿ”ง Utilities
(88)
free with in-app purchases
15
Time Calculator - Work Hours
Time Calculator - Work Hours
Time Calculator - Work Hours
Date, Calendar & Salary Clock
Free

This comprehensive toolkit helps manage time, dates, and schedules with various calculators. Track work hours, plan shifts, convert time formats, and calculate differences between dates. Ideal for professionals, freelancers, and everyday users needing precise time management.

Work time trackingShift schedulingDate difference calculation
๐Ÿ”ง Utilities
(2.7K)
freemium
16
Oxygen Cylinder Autonomy Calc
Oxygen Cylinder Autonomy Calc
Oxygen Cylinder Autonomy Calc
for Diving and First Aid
Free
โšฝ Sports
(0)
17
Oxygen Calculation Tool
Oxygen Calculation Tool
Oxygen Calculation Tool
by Joshua Savko
$0.99

This app helps medical transport professionals quickly calculate usable oxygen supply based on cylinder pressure and flow rate. It also includes a drip rate calculator for medication math and a reference section with conversion factors. Features a countdown timer and dark mode compatibility.

Oxygen supply calculationDrip rate calculatorCountdown timer
๐Ÿ” Reference
(152)
paid
18
Instant Pulse - Blood Pressure
Instant Pulse - Blood Pressure
Instant Pulse - Blood Pressure
Heart Mate, AFib, Oxygen,HRV
Free

Monitor and manage your pulse rate, rhythm, blood pressure, and oxygen levels using your smartphone camera. Quickly check your heart rhythm and track vital signs for general health and wellbeing.

Track blood pressure and pulse rateMonitor blood oxygen levelsReal-time pulse monitoring
๐Ÿ’ช Health & Fitness
(5.2K)
subscription
19
Hours + Minutes Calculator Pro
Hours + Minutes Calculator Pro
Hours + Minutes Calculator Pro
Minutes + Seconds Calculator
Free

Easily add or subtract time values including hours, minutes, and seconds. Calculate durations with days, weeks, months, and years. This tool simplifies time-based calculations for various needs.

Add/subtract hours, minutes, secondsCalculate with days, weeks, months, yearsSupports multiple time units
๐Ÿ“Š Productivity
(165)
ad-supported
20
Medtimer: Heart + Respiratory
Medtimer: Heart + Respiratory
Medtimer: Heart + Respiratory
Vital Rate Timer for Medics
Free

This app provides a fast and accurate way for medical professionals to measure heart and respiratory rates. It features a simple tap interface, instant calculations, and reference charts for all age groups. Designed for efficiency in clinical settings, it keeps users focused on their patients.

Tap-anywhere interface for recordingIntuitive HR and RR recordingInstant automatic rate calculations
๐Ÿฅ Medical
(506)
free with in-app purchases