AirCalc_ vs EngineerCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AirCalc_
This app calculates the state of moist air using parameters like pressure, temperature, and humidity. It simplifies psychrometric diagram readings by allowing calculations with just three known values, assuming normal atmospheric pressure.
- Moist air state calculation
- Pressure, temperature, humidity input
- Specific enthalpy and volume calculation
- Simplified psychrometric diagram readings
- Adjustable pressure settings
- Assumed temperature range: -20°C to 90°C
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The state of moist air is shown by pressure, dry-bulb temperature, relative humidity, specific enthalpy, specific volume bulk, etc. These values can be calculated if each expression of relations shows three values. Usually, since pressure is used under normal atmospheric pressure in many cases, if this is set constant and two status values are given, it can calculate other values by calculation. By using this program, each status value read in the psychrometric diagram can usually be calculated easily. Use of the range of dry-bulb temperature DB-20℃ to 90℃ is assumed. Even if it exceeds this domain, calculation may be possible, but the error will be larger.
EngineerCalc
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EngineerCalc is an app for electrical engineers and hobbyists. At the moment, it includes 4 calculators: • CapacitorCalc - Calculate the ripple voltage refusing capacitor capacitance and min. voltage for your AC-DC circuit • InductorCalc - Calculate the inductance, needed wire-length (and resistance of the wire) and Q-value for your diy coil/inductor • LC-TankCircuit - Calculate the 3rd value of your tank-circuit (capacitance, inductance or frequency) • Ohm'sLawCalc - Calculate the 3rd and/or 4th value of an Ohm's law circuit (voltage, current, resistance or power ) The app supports multiple units which you can change by tapping the unit-label: For CapacitorCalc: • Voltage (Volt) - V • Current (Amper) - A • Frequency (Herz) - Hz For InductorCalc: • Distance (Meter) - µm, mm, cm, m, Km • Resistance (Ohm) - pΩ, nΩ, µΩ, mΩ, Ω, KΩ, MΩ, GΩ • Frequency (Herz) - Hz, KHz, MHz, GHz • Inductance (Henry) - pH, nH, µH, mH, H, KH, MH, GH For LC-TankCircuit: • Capacitance (Farad) - pF, nF, µF, mF, F, KF, MF, GF • Inductance (Henry) - pH, nH, µH, mH, H, KH, MH, GH • Frequency (Herz) - Hz, KHz, MHz, GHz For Ohm'sLawCalc: • Voltage unit (Volt) - pV, nV, µV, mV, V, KV, MV, GV • Current unit (Amper) - pA, nA, µA, mA, A, KA, MA, GA • Resistance unit (Ohm) - pΩ, nΩ, µΩ, mΩ, Ω, KΩ, MΩ, GΩ • Power unit (Watt) - pW, nW, µW, mW, W, KW, MW, GW If you have an development suggestion, want to request an unit support or want to report a bug, you can get in touch with me trough my website https://ssl-saario.xyz/AppFiles/html/eCalcHelp.html
Screenshots
Verdict
The clearest difference is update cadence: AirCalc_ at every 3 months against EngineerCalc's every 60 months. AirCalc_ also leads on price ($0.99 vs $1.99). EngineerCalc's advantage is iOS requirement (12.0 vs 15.0). 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
AirCalc_ costs $0.99 and EngineerCalc $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
AirCalc_ ships an update every 3 months, EngineerCalc every 60 months. The most recent releases landed on September 9, 2026 and September 15, 2026 respectively.
| Parameter | AirCalc_ | EngineerCalc |
|---|---|---|
| Price | $0.99 — better | $1.99 |
| Positive reviews | 25.0% of reviews | — |
| Update frequency | Every 3 months — better | Every 60 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 24 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | AIR DESIGN, INC. | oskari saarinen |
In-app purchases
AirCalc_
No in-app purchases
EngineerCalc
No in-app purchases









