Comparison

Call Forwarding vs Mean HVAC BS Tools

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

Head to head
About

Call Forwarding

Enable conditional call forwarding on your iPhone for busy, unanswered, or out-of-reach calls. Manage activation, deactivation, and status checks for these forwarding types. This app utilizes standard GSM call forwarding codes.

Highlights
  • Conditional call forwarding
  • Forward when busy
  • Forward when no answer
  • Forward when out of reach
  • Activate call forwarding
  • Deactivate call forwarding
  • Check call forwarding status
Features
Read full description

Now you can have conditional call forwarding on your iPhone you can forward calls when busy, when no answer, and/or when out of reach. with call forwarding you can activate, deactivate and check status of all of the above conditional call forwarding types. **This app is using default call forwarding codes which are used by GSM carriers all over the world if your carrier is not a GSM carrier this app will not work with you**

About

Mean HVAC BS Tools

This utility app offers a suite of calculators for HVAC professionals, including psychrometric analysis, duct sizing, insulation R-value estimation, and air bypass calculations. It helps engineers and technicians quickly determine essential parameters for system design and analysis.

Highlights
  • Single Point Psychrometrics
  • Mixed Air Psychrometrics
  • Duct Calculator (CFM, Diameter, Friction, Velocity)
  • Smallest Zone Calculator
  • Bypass Calculator (Cooling/Heating)
  • IR Wall Insulation R-Value Estimation
  • Parallel R-Value Calculator
  • Unit Converter
Features
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BS Tools is a toolkit of calculators designed for HVAC and other Building Science (BS) applications, as an alternative to more tedious, manual methods. UTILITIES Single Point Psychrometrics: This calculator provides psychrometric properties of air at a glance. It's great for changing humidity units. Mixed Air Psychrometrics: This calculator provides psychrometric properties of the resulting air of two mixed air streams, e.g. ventilation air mixed with return air. Duct Calculator: In a word, it's a classic 'ductulator'. This tool accepts any two choice inputs among CFM (Air Flow Volume), Duct Diameter, Friction Rate (Head Loss), and Air Velocity. This utility will then provide the other two parameters for you. Uses either a round diameter, or rectangular dimensions. Smallest Zone Calculator: This calculator can be used to gauge how much excess air is acceptable in a heating or cooling system. Bypass Calculator: Paired with the Smallest Zone Calculator, this can tell you how much air you can bypass. Values are unique for cooling and heating (adjustable for altitude). IR Wall Insulation: This calculator can help you estimate the R-Value of a wall, with Infrared (IR) exterior and interior surface, and interior ambient temperatures. Provides a common wall material that best matches your readings with a general degree of confidence in that match. Note included tips on measuring for best results. Parallel R-Value: This calculator provides an overall R-Value (and U-Value) for a wood frame building assembly* (typically a wall), given the R-Values of different materials and their areas or proportions present in the assembly. *Not for use with metal framing. ASHRAE 62.2-2019: Gives ventilation CFM requirements corresponding to ASHRAE 62.2-2019. Fan Run-Time: Simple calculator to calculate ventilation system run time, in min/hr, given the ventilation requirement and fan capacity. Pairs nicely with ASHRAE 62.2 Calculator (and is automatically linked). Note: The above calculators use IP (inch / pound) units. Unit Converter: Converts units. Interpolator: For when you have the number you're looking for at THIS point and THAT point but you're actually somewhere BETWEEN those points.

Screenshots

Call Forwarding2 screens
Mean HVAC BS Tools4 screens

Verdict

The call

The clearest difference is review sentiment: Mean HVAC BS Tools at 100% against Call Forwarding's 8%. Mean HVAC BS Tools also leads on price (Free vs $2.99) and rating (5.0 vs 1.5). Call Forwarding's advantage is ratings volume (16 vs 4) and iOS requirement (10.0 vs 15.1). On update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

Mean HVAC BS Tools is free to download; Call Forwarding costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Mean HVAC BS Tools holds the better App Store score, 5.0 against 1.5. Both are backed by a comparable volume of ratings — 16 and 4 respectively. Written reviews point the same way: 8% of Call Forwarding's written reviews are positive against 100% of Mean HVAC BS Tools's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

Scorecard6 real differences · 4 level
Call Forwarding versus Mean HVAC BS Tools: the parameters behind the verdict, then further details
ParameterCall ForwardingMean HVAC BS Tools
Price$2.99Free — better
Rating1.5 (16 ratings)5.0 (4 ratings) — better
Positive reviews8.2% of reviews100.0% of reviews — better
Number of ratings16 — better4
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS10.0 — better15.1
Further details — not scored
Size14 MB54 MB
Age rating4+4+
DeveloperAbdel Karim SoumanMean HVAC Consulting & Design LLC

Customer experience

Call Forwarding

All ratings16 ratings
Positive12.5%
Neutral0.0%
Negative87.5%
Written reviews97 reviews
Positive8.2%
Neutral2.1%
Negative89.7%

Mean HVAC BS Tools

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Call Forwarding

No in-app purchases

None

Mean HVAC BS Tools

No in-app purchases

Questions

Is Call Forwarding free?
Call Forwarding costs $2.99, with no in-app purchases.
Is Mean HVAC BS Tools free?
Mean HVAC BS Tools is free to download, with no in-app purchases.
Which has better reviews, Call Forwarding or Mean HVAC BS Tools?
Mean HVAC BS Tools is rated higher. Call Forwarding averages 1.5 out of 5 from 16 ratings, while Mean HVAC BS Tools averages 5.0 from 4 ratings.
Do Call Forwarding or Mean HVAC BS Tools have ads?
Neither Call Forwarding nor Mean HVAC BS Tools shows ads.
Which is updated more often, Call Forwarding or Mean HVAC BS Tools?
Call Forwarding ships an update every 2 months, and Mean HVAC BS Tools every 2 months. Most recently, Call Forwarding was updated on October 29, 2026 and Mean HVAC BS Tools on October 24, 2026.

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