Calc pH vs Air Density Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calc pH
Read full descriptionHide full description
*** pH - Calculator *** "pH - calculator" is used to calculate the pH value of two mixed liquids. Enter the pH and volume for both liquids and then press calculate. The mixed pH-value will then be displayed..
Air Density Calculator
Instantly calculate air density and atmospheric properties with this offline engineering tool. Features three modes for density, reverse solving, and altitude estimation, with flexible unit support and calculation breakdown.
- Accurate air density calculation
- Density, Reverse Solve, and Altitude modes
- Flexible unit support
- Show calculation steps
- Tap to copy results
- Calculation history
- Offline functionality
Read full descriptionHide full description
Calculate air density and atmospheric properties instantly with this professional engineering calculator. Designed for engineers, pilots, meteorologists, and physics students who need quick, accurate results without an internet connection. Accurate Air Density Calculation Compute air density using the ideal gas law: ρ = (pd / (rd * T)) + (pv / (rv * T)). Enter temperature and pressure in your preferred units and get precise results immediately. Three Powerful Modes • Density Mode - Calculate air density from temperature and pressure inputs • Reverse Solve Mode - Find any unknown variable (pressure, temperature, or density) when the other two are known • Altitude Mode - Estimate temperature, pressure, and air density at any altitude using the International Standard Atmosphere (ISA) model Flexible Unit Support Switch freely between units: • Temperature: Celsius / Kelvin • Pressure: Pa / hPa / atm • Altitude: meters / feet All conversions are handled automatically so you can work in the units you prefer. Show Your Work Tap "Show Steps" to reveal the full calculation breakdown including the formula used, unit conversions, substituted values, and final result. Perfect for learning, teaching, or verifying your work. Tap to Copy Tap any result to copy it to your clipboard instantly. Paste values directly into reports, spreadsheets, or other tools. Calculation History Save your results, review past calculations, or swipe to delete. Built for Professionals • Works completely offline. No internet required. • Clean, distraction-free interface designed for fast input • Built-in reference page with formulas, constants, and unit conversions • Supports Dark Mode • Optimized for iPhone and iPad Who Is This For? • Aerospace and mechanical engineers • Pilots and aviation professionals • HVAC technicians • Meteorologists and atmospheric scientists • Physics and engineering students • Anyone working with gas laws and atmospheric data Download now and get reliable air density calculations in seconds. Thank you for your support. Please visit nitrio.com for more apps for your iOS devices.
Screenshots
Verdict
The clearest difference is price: Calc pH at Free against Air Density Calculator's $2.99. Calc pH also leads on iOS requirement (9.0 vs 17.6). Air Density Calculator's advantage is update cadence (every 20 months vs every 59 months). On ads, in-app purchases 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
Calc pH is free to download; Air Density Calculator costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Calc pH ships an update every 59 months, Air Density Calculator every 20 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.
| Parameter | Calc pH | Air Density Calculator |
|---|---|---|
| Price | Free — better | $2.99 |
| Rating | — | 3.8 (4 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 4 — better |
| Update frequency | Every 59 months | Every 20 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 9.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 0 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | ZOFTERM | Nitrio |
In-app purchases
Calc pH
No in-app purchases
Air Density Calculator
No in-app purchases
Questions
Is Calc pH free?
Is Air Density Calculator free?
Do Calc pH or Air Density Calculator have ads?
Which is updated more often, Calc pH or Air Density Calculator?
Other comparisons















