EngineerCalc vs Psychro Calc Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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
Psychro Calc Pro
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Psychro Calc Pro is a psychrometric calculator for HVAC engineers and technicians. Calculate dry bulb, wet bulb, dew point, relative humidity, humidity ratio, enthalpy and air density from any two independent properties, at altitudes from −500 m to 11 000 m. CALCULATION ENGINE Saturation pressure over water and ice from the Hyland–Wexler equations (ASHRAE Handbook—Fundamentals, Ch. 1), Greenspan (1976) enhancement factor, and the ASHRAE wet bulb equation. Valid from −100 °C to +200 °C. PSYCHROMETRIC CHART IN PDF REPORTS Relative humidity, enthalpy, wet bulb and specific volume lines, with automatic Standard, Low Temp and Industrial Drying modes. REPORTS & HISTORY SI and IP (Imperial) units throughout — results, chart, PDF reports and history — plus your company logo on PDF reports. FREE TRIAL, ONE-TIME PURCHASE Free to download. Try every feature free for 3 days — no payment, no sign-up. After the trial, unlock everything with a one-time purchase. No subscription, no recurring fees. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://iklimet-lab.com/privacy-policy/
Screenshots
Verdict
The clearest difference is price: Psychro Calc Pro at Free against EngineerCalc's $1.99. Psychro Calc Pro also leads on update cadence (every 4 days vs every 60 months). EngineerCalc's advantage is in-app purchases (none vs 2) and iOS requirement (12.0 vs 15.0). On 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
Psychro Calc Pro is free to download; EngineerCalc costs $1.99 up front. Psychro Calc Pro sells 2 in-app purchases, starting at $3.99 per month. EngineerCalc asks for nothing beyond the download.
EngineerCalc ships an update every 60 months, Psychro Calc Pro every 4 days. The most recent releases landed on October 26, 2026 and October 31, 2026 respectively.
| Parameter | EngineerCalc | Psychro Calc Pro |
|---|---|---|
| Price | $1.99 | Free — better |
| Update frequency | Every 60 months | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 10 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | oskari saarinen | Mehmet Karakas |
In-app purchases
EngineerCalc
No in-app purchases
Psychro Calc Pro
- Monthly Premium3 Days trial$3.991 Month
- Lifetime Premium$9.99
Questions
Is EngineerCalc free?
Is Psychro Calc Pro free?
Do EngineerCalc or Psychro Calc Pro have ads?
Which is updated more often, EngineerCalc or Psychro Calc Pro?
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