Comparison

Allday HVAC Calc vs Aspen Compressor Controller

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

Head to head
About

Allday HVAC Calc

This app offers three specialized modules for HVAC engineers: a psychrometric calculator for air properties, a pipe calculator for fluid dynamics and selection, and a duct calculator for air speed and pressure loss. It provides detailed calculations and reference formulas in both SI and IP units.

Highlights
  • Psychrometric air property calculations
  • Pipe velocity and pressure loss calculation
  • Duct speed and pressure loss calculation
  • Interdependent parameter calculations
  • Reference formulas included
  • SI and IP unit support
Features
Read full description

The application can be useful for HVAC engineers and contains 3 modules. Psychrometric Calculator - this module determines air properties based on input values such as dry-bulb temperature, wet-bulb temperature, and relative humidity. It provides results like humidity ratio, specific volume, enthalpy, and vapor pressure in both SI and IP units. Pipe Calculator - this module is used to calculate velocity and pressure loss in pipelines and to select pipeline diameters for a given maximum velocity and pressure loss. The module supports interdependent calculations of flow rate, heat load, and fluid temperatures: when any three of these parameters are specified, the fourth is calculated automatically. It can also be used as a reference for heat transfer fluid properties and pipe characteristics. Duct Calculator - the module is used to calculate the speed and pressure loss in round, rectangular and oval air ducts when moving wet or dry air through them, as well as to select their sections for a given maximum speed and maximum pressure loss. Additionally, the heating or cooling power is calculated for a given air flow rate, or reverse calculations: air flow rate for a given power; temperature of incoming or outgoing air for a given power and flow rate. It can also be used as a reference material for determining the properties of wet and dry air at different pressures and temperatures. Also in the description sections are the reference formulas by which the calculations are made. Web version: calc.ashrae-meteo.info

About

Aspen Compressor Controller

Monitor and adjust your compressor system's performance. This application connects to the Aspen Compressor Control Board to display real-time readings like speeds and temperatures, enabling optimized operation.

Highlights
  • Monitor compressor speeds
  • Display system temperatures
  • Control fan speeds
  • Optimize system performance
  • Connect to control board
Features
Read full description

Aspen Compressor's system controller allows users to easily monitor and control their systems by connecting to the Aspen Compressor Control Board. This app provides the ability to change and display system readings such as compressor speeds, temperatures, and fan speeds allowing for optimized system performance.

Screenshots

Allday HVAC Calc4 screens
Aspen Compressor Controller2 screens

Verdict

The call

The clearest difference is in-app purchases: Aspen Compressor Controller at none against Allday HVAC Calc's 1. Allday HVAC Calc's advantage is iOS requirement (15.0 vs 17.2). On price, rating, ratings volume and update cadence 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

Both are free to download. Allday HVAC Calc sells 1 one-off in-app purchase. Aspen Compressor Controller asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Allday HVAC Calc against 5.0 for Aspen Compressor Controller. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

Allday HVAC Calc ships an update every 3 months, Aspen Compressor Controller every 2 months. The most recent releases landed on October 22, 2026 and October 15, 2026 respectively.

Scorecard2 real differences · 7 level
Allday HVAC Calc versus Aspen Compressor Controller: the parameters behind the verdict, then further details
ParameterAllday HVAC CalcAspen Compressor Controller
PriceFreeFree
Rating5.0 (1 ratings)5.0 (1 ratings)
Number of ratings11
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.2
Further details — not scored
Size38 MB1 MB
Age rating4+4+
DeveloperDmitrii PankovAspen Compressor, LLC

Customer experience

Allday HVAC Calc

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Aspen Compressor Controller

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Allday HVAC Calc

One-time1
  • Allday Design Assist$4.99
None

Aspen Compressor Controller

No in-app purchases

Questions

Is Allday HVAC Calc free?
Allday HVAC Calc is free to download, with in-app purchases available.
Is Aspen Compressor Controller free?
Aspen Compressor Controller is free to download, with no in-app purchases.
Which has better reviews, Allday HVAC Calc or Aspen Compressor Controller?
Allday HVAC Calc and Aspen Compressor Controller are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.
Do Allday HVAC Calc or Aspen Compressor Controller have ads?
Neither Allday HVAC Calc nor Aspen Compressor Controller shows ads.
Which is updated more often, Allday HVAC Calc or Aspen Compressor Controller?
Allday HVAC Calc ships an update every 3 months, and Aspen Compressor Controller every 2 months. Most recently, Allday HVAC Calc was updated on October 22, 2026 and Aspen Compressor Controller on October 15, 2026.

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