Comparison

O2 Duration vs 3DPrinter Cost Calculator

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

O2 Duration

Calculate the approximate remaining oxygen in portable cylinders. Select your tank size, input current pressure and desired flow rate to see duration in minutes. Features a timer with alerts for low pressure.

Highlights
  • Oxygen cylinder duration calculation
  • Supports multiple cylinder sizes (A, B, D, E, G, H, K, M)
  • Input current tank pressure
  • Input desired flow rate
  • Displays duration in minutes
  • Running timer with remaining time
  • Low pressure alerts (500lbs and 0lbs)
Features
Read full description

O2 Duration is an oxygen consumption calculator for various oxygen cylinder sizes. This is the easiest way to quickly determine the approximate number of minutes until an oxygen tank will be depleted of oxygen. This tool is a must have for Nurse's and EMT’s who work with portable oxygen cylinders. The application allows you to select cylinder tank sizes A, B, D E, G, H, K and M. With the current tank pressure and desired flow rate, the app will display the oxygen duration in minutes. Additionally, a timer can be started which will display a running tank pressure and time in minutes remaining until the tank is empty. When tank pressure reaches 500lbs or when the tank pressure is zero the application will alert you. This is not a substitute for looking at the oxygen cylinder gauge to determine actual pressure and should not be relied on as a means to determine oxygen remaining.

About

3DPrinter Cost Calculator

This app helps 3D printing enthusiasts and businesses accurately calculate the cost of their prints. It factors in material, electricity, depreciation, and labor to provide instant quotes and profit margins.

Highlights
  • Accurate cost estimation
  • Factor in electricity and depreciation
  • Track labor and slicing time
  • Set desired profit margins
  • Supports PLA, PETG, ABS, and Resin
Features
Read full description

Stop guessing what to charge. Profit Print turns filament, machine time, labor, electricity, fees, shipping, tax, and your target margin into a clear, professional price. Built for 3D printing hobbyists, Etsy sellers, makers, and print-farm owners, Profit Print keeps pricing fast without hiding the costs that decide whether a job is actually profitable. CALCULATE TRUE COST • Estimate filament or resin usage • Include electricity and printer depreciation • Add labor, post-processing, and other expenses • Account for marketplace and payment fees • Apply discounts, shipping, and sales tax • Set your markup and see profit instantly CREATE AND MANAGE QUOTES • Save customer-ready quotes • Track Draft, Sent, Accepted, Printed, and Paid orders • Duplicate previous quotes to price repeat work faster • Reuse printer, material, and pricing details • Generate polished invoices for customers RUN A SMARTER PRINTING BUSINESS • Monitor revenue, profit, and order progress • Keep an eye on material inventory • Catch low-stock issues before accepting a job • Store printers and materials for faster estimating Whether you are pricing one custom print or managing a growing side business, Profit Print gives you a repeatable way to quote confidently and protect your margin.

Screenshots

O2 Duration3 screens
3DPrinter Cost Calculator4 screens

Verdict

The call

The clearest difference is price: 3DPrinter Cost Calculator at Free against O2 Duration's $2.99. 3DPrinter Cost Calculator also leads on rating (2.0 vs 1.0) and update cadence (every 2 months vs every 15 months). O2 Duration's advantage is in-app purchases (none vs 2) and iOS requirement (7.0 vs 17.6). On review sentiment, ratings volume, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

3DPrinter Cost Calculator is free to download; O2 Duration costs $2.99 up front. 3DPrinter Cost Calculator sells 2 one-off in-app purchases. O2 Duration asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

3DPrinter Cost Calculator holds the better App Store score, 2.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews split almost evenly too, at 0% and 0% positive.

UpkeepUpdate frequency

O2 Duration ships an update every 15 months, 3DPrinter Cost Calculator every 2 months. The most recent releases landed on September 30, 2026 and October 11, 2026 respectively.

Scorecard6 real differences · 4 level
O2 Duration versus 3DPrinter Cost Calculator: the parameters behind the verdict, then further details
ParameterO2 Duration3DPrinter Cost Calculator
Price$2.99Free — better
Rating1.0 (1 ratings)2.0 (2 ratings) — better
Positive reviews0.0% of reviews0.0% of reviews
Number of ratings12 — better
Update frequencyEvery 15 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPodiPhone, iPad
Requires iOS7.0 — better17.6
Further details — not scored
Size1 MB17 MB
Age rating4+4+
DeveloperAdvanced Aviation LLCJay ortiz

Customer experience

O2 Duration

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

3DPrinter Cost Calculator

All ratings2 ratings
Positive0.0%
Neutral50.0%
Negative50.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

O2 Duration

No in-app purchases

2 purchases

3DPrinter Cost Calculator

One-time2
  • pro yearly$4.99
  • pro lifetime$19.99

Questions

Is O2 Duration free?
O2 Duration costs $2.99, with no in-app purchases.
Is 3DPrinter Cost Calculator free?
3DPrinter Cost Calculator is free to download, with in-app purchases available.
Which has better reviews, O2 Duration or 3DPrinter Cost Calculator?
3DPrinter Cost Calculator is rated higher. O2 Duration averages 1.0 out of 5 from 1 ratings, while 3DPrinter Cost Calculator averages 2.0 from 2 ratings.
Do O2 Duration or 3DPrinter Cost Calculator have ads?
Neither O2 Duration nor 3DPrinter Cost Calculator shows ads.
Which is updated more often, O2 Duration or 3DPrinter Cost Calculator?
O2 Duration ships an update every 15 months, and 3DPrinter Cost Calculator every 2 months. Most recently, O2 Duration was updated on September 30, 2026 and 3DPrinter Cost Calculator on October 11, 2026.

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