Comparison

Calculate Comfort vs Shared Todo

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

Head to head
About

Calculate Comfort

This app analyzes atmospheric conditions by calculating various air properties like relative humidity, dew point, and enthalpy. It provides visual indicators for comfort levels and allows for easy adjustment of input values using a dial. Advanced features include weather data fetching and unit conversions.

Highlights
  • Calculates RH, Dew Point, Wet-Bulb Temp, Enthalpy, and more
  • Visual comfort indicators with color and emoji
  • Adjustable atmospheric pressure input
  • Switchable between Discomfort Index (DI) and WBGT
  • Automatic weather data fetching
  • Unit conversion between SI and US units (Pro)
  • Export calculation results as text (Pro)
Features
Read full description

Calculate Comfort computes the psychrometric properties of moist air — dew point, wet bulb temperature, absolute humidity, enthalpy and more — from temperature and humidity. Turn a dial instead of reading a psychrometric chart. Built for HVAC design, instrumentation, building maintenance and condensation control. Units: the Pro version switches the entire readout between IP and SI in one tap, °F⇄°C included. Useful when your measurements are in IP but the equipment data is in SI. If you work only in Fahrenheit, our companion app Psychrometer °F opens in Fahrenheit by default. ■ Who it's for ・HVAC engineers and contractors who need moist-air properties on site ・Technicians converting psychrometer readings to relative humidity ・Anyone assessing condensation or mold risk from dew point ・Students learning to read a psychrometric chart ■ What it calculates Enter temperature plus relative humidity, dew point or wet bulb temperature: ・Relative humidity (%RH) ・Dew point (°C DP) / frost point (°C FP), switchable below 0 °C ・Wet-bulb temperature (°C WB) ・Mixing ratio, gravimetric absolute humidity (g/kg) ・Absolute humidity, volumetric (g/m³) ・Enthalpy (kJ/kg), for load calculations ・Specific volume (m³/kg) ・Vapor pressure and saturated vapor pressure (hPa) ・Discomfort index (DI) ・Estimated WBGT heat index (indoor, no solar load) ・Comfort indicator (18–28 °C, 40–70 % RH) ■ Main features ◯ Three input modes: relative humidity, dew point or wet bulb temperature. Tap the % icon to switch; keyboard entry also available. ◯ Works in place of a psychrometric chart. Dew point mode traces constant absolute humidity — sensible heating and cooling. Wet bulb mode traces the constant wet-bulb line — humidification and dehumidification. ◯ Three psychrometer types: aspirated (Assmann), wall-mounted (August) and sling. Below freezing you can set whether the wet bulb is iced; below −10 °C this applies automatically, except for the sling type. ◯ Pressure-corrected calculation: standard pressure (1013.25 hPa), built-in barometer, weather data or manual entry (800–1200 hPa). ◯ Automatic weather retrieval from your location, with a recommended indoor temperature (ASHRAE Standard 55). Choose OpenWeatherMap or Apple Weather. ◯ Works offline. A connection and location permission are needed only to fetch outdoor weather. ◯ Comfort indicator in color and emoji. [Common gestures] ・Pressure and index readouts: tap to open settings ・Outdoor air (weather icon), dew point input, wet bulb input and reset buttons: touch and hold to open settings ■ Pro version (one-time in-app purchase) ・Removes all ads ・IP ⇄ SI unit switching in one tap: °C⇄°F, g/kg⇄gr/lb, g/m³⇄gr/ft³, kJ/kg⇄BTU/lb, m³/kg⇄ft³/lb, hPa⇄inHg ・Text export of calculation results ・Extended pressure input: 23–36 inHg ・Selectable saturation vapor pressure formula: Sonntag (WMO), Hyland-Wexler (ASHRAE), Wagner-Pruß (IAPWS-95), Goff-Gratch, Magnus-Tetens ■ Supported devices iPhone with iOS 16.0 or later. Also runs on Apple M1 Mac (macOS 13.0 or later) and visionOS 1.0. Home Screen: ComfortCalc. App header: Psychrometer°Calc. ■ What it does not do ・Does not measure temperature or humidity with the device; outdoor values come from weather data ・Does not perform measured WBGT with a globe thermometer ・Does not draw a psychrometric chart ■ Calculation basis ・Saturated vapor pressure: Sonntag; other formulas in Pro ・Vapor pressure: JIS Z 8806 ・Relative humidity and dew point: JIS and WMO; denominator over supercooled water ・Enthalpy: ASHRAE definition ・Recommended indoor temperature: ASHRAE Standard 55 ■ Notes Extreme input values increase error and may produce an error state. Rounding may shift the last digit when switching modes. Correctness of results is not guaranteed and no liability is accepted for damages arising from use. Documentation, FAQ and calculation specs: https://www7b.biglobe.ne.jp/~kanayama/PsychrometerCalc/

About

Shared Todo

Organize your personal tasks or collaborate with others on shared projects. This simple app helps you manage to-do lists, set reminders, and assign tasks for seamless teamwork. Stay on track with real-time updates and enhanced productivity.

Highlights
  • Create personal task lists
  • Collaborate on shared lists
  • Set task reminders
  • Assign tasks to users
  • Real-time sync updates
  • Flexible task management
Features
Read full description

Life's hectic. Let's keep it in check. Whether you're juggling your personal responsibilities or working with others, Shared ToDo has got you covered. Shared ToDo is a simple application that is meant to keep your task list in order and your collaborations smooth. Here's what you can do with Shared ToDo: Create Personal Lists: Keep a list of your personal tasks and goals. Share Work with Others: Collaborate effortlessly with colleagues, friends, or family members. Set Reminders: Receive timely reminders to ensure nothing goes through the cracks. Assign Tasks: Understand who is doing what and when. Stay Synced: Real-time updates keep everyone in the loop. Shared ToDo is designed with simplicity and ease of understanding, so you can concentrate on what matters most. Why Use Shared ToDo Flexible Task Management: Appropriate for individuals, families, roommates, and small groups. Enhanced Productivity: Continue tracking responsibility and hold teams accountable. Privacy Controls: Keep your private tasks under your control while you work towards shared goals. Are you ready to organize your day? Download Shared ToDo and organize your tasks.

Screenshots

Calculate Comfort4 screens
Shared Todo4 screens

Verdict

The call

The clearest difference is rating: Shared Todo at 5.0 against Calculate Comfort's 3.9. Shared Todo also leads on in-app purchases (none vs 1) and ads (none vs shown). Calculate Comfort's advantage is ratings volume (35 vs 2). On price 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. Calculate Comfort sells 1 one-off in-app purchase. Shared Todo asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Shared Todo holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: Calculate Comfort has 35 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 75% of Calculate Comfort's written reviews are positive against 100% of Shared Todo's.

UpkeepUpdate frequency

Calculate Comfort ships an update every 4 months, Shared Todo weekly. The most recent releases landed on October 23, 2026 and October 10, 2026 respectively.

Scorecard9 real differences · 1 level
Calculate Comfort versus Shared Todo: the parameters behind the verdict, then further details
ParameterCalculate ComfortShared Todo
PriceFreeFree
Rating3.9 (35 ratings)5.0 (2 ratings) — better
Positive reviews75.0% of reviews100.0% of reviews — better
Number of ratings35 — better2
Update frequencyEvery 4 monthsWeekly — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS16.013 — better
Further details — not scored
Size13 MB38 MB
Age rating4+4+
DeveloperJUN KANAYAMANebula Edge LLC

Customer experience

Calculate Comfort

All ratings35 ratings
Positive68.6%
Neutral5.7%
Negative25.7%
Written reviews28 reviews
Positive75.0%
Neutral10.7%
Negative14.3%

Shared Todo

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Calculate Comfort

One-time1
  • Pro Version$7.99
None

Shared Todo

No in-app purchases

Questions

Is Calculate Comfort free?
Calculate Comfort is free to download, with in-app purchases available.
Is Shared Todo free?
Shared Todo is free to download, with no in-app purchases.
Which has better reviews, Calculate Comfort or Shared Todo?
Shared Todo is rated higher. Calculate Comfort averages 3.9 out of 5 from 35 ratings, while Shared Todo averages 5.0 from 2 ratings.
Do Calculate Comfort or Shared Todo have ads?
Calculate Comfort shows ads; Shared Todo does not.
Which is updated more often, Calculate Comfort or Shared Todo?
Calculate Comfort ships an update every 4 months, and Shared Todo weekly. Most recently, Calculate Comfort was updated on October 23, 2026 and Shared Todo on October 10, 2026.

Other comparisons