Comparison

NATE ResLoad vs CTC Supply Mobile

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

Head to head
About

NATE ResLoad

This app performs ACCA-approved residential load calculations for HVAC systems. It allows users to create detailed reports for cooling and heating loads, including room-by-room analysis, and email them as PDFs. It also includes a built-in HVAC Equipment Locator.

Highlights
  • ACCA-approved Manual J8 calculations
  • Field-based load calculations
  • Emailable PDF reports
  • Unlimited project creation
  • Global weather database
  • HVAC Equipment Locator included
Features
Read full description

The NATE ResLoad-J app was developed by Carmel Software for North American Technical Excellence, Inc. (NATE). This is an ACCA-approved Manual J8 residential load calculation app for the Apple iPad. It allows engineers, contractors, and technicians to perform field-based cooling and heating load calculations on residential and small commercial buildings. Users are then able to email PDF reports to customers and local building officials. Reports produced by this app will be acceptable by all municipalities/states (including Florida and Massachusetts which recently passed laws requiring contractors to submit load calcs from ACCA-approved software.) For training webinar schedule, go here: http://bit.ly/SaHmPS For online help and training videos, go here: http://bit.ly/1PhqlDi Bonus: The NATE ResLoad-J app now includes our popular HVAC Equipment Locator app built right in! Click here for details about that app: http://bit.ly/1a2RskH The NATE ResLoad-J app allows users to create unlimited projects and perform both block and room-by-room loads. The app includes weather data for 1000s of cities throughout the world and construction data for 100s of wall, floor, roof, ceiling, and window types. The user is also able to model detailed appliance, duct, infiltration, and ventilation loads. This app was specifically designed for the Apple iPad, taking advantage of the larger screen, rotating user interface, and other functionality unique to the iPad. Other features include: 1. Includes a 1000+ world-wide city weather database 2. Allows you to create and store an unlimited number of projects. You can also re-use existing projects as templates for new projects. 3. Includes data for 100s of construction types for walls, roofs, floors, doors, windows, skylights, and ceilings. 4. Allows you to specify an unlimited # of building envelope types (i.e. – doors, walls, roofs, floors, ceilings), window types, and skylight types for each building. 5. Allows you to input individual home appliance information. 6. Allows you to instantly view total heating and cooling load results as you update input data. 7. Allows you to view comprehensive cooling and heating load breakdown reports including breakdown by envelope load, window load, skylight load, infiltration load, ventilation load and internal load contributions. 8. Also performs room-by-room cooling and heating load calc analysis 9. Includes the ability to display a wide variety of on-screen reports including checksum reports (ie – BTUh/SqFt, SqFt/Ton, etc.), complete heating and cooling load breakdown reports, and even graphically-pleasing pie charts showing cooling and heating load breakdowns. These reports can be converted to PDFs and emailed from right within the app. 10. Includes the ability to display a comprehensive HTML report that you can email to yourself or others, and it also includes a spreadsheet attachment that you can open in Excel to create customized reports. 11. Includes the ability to display units in either English (IP) or Metric (SI). The benefits of using this app are numerous including: 1. Great for use out in the field. Quickly size heating and cooling equipment, show the client, then email the results back to your office for further analysis. 2. Show off your advanced on-screen reports to clients convincing them you are using cutting-edge technology. 3. Save time by inputting information in the field and then returning to your office to perform more in-depth analysis. 4. Submit reports to local municipalities that require ACCA-approved Manual J8 residential load calcs for equipment replacement.

About

CTC Supply Mobile

This app provides HVAC professionals with mobile access to product availability, pricing, and online ordering. It allows users to create bids, manage their accounts, and locate nearby branches, streamlining business operations.

Highlights
  • Check product availability and pricing
  • Order supplies online for pickup or delivery
  • Create and convert bids for customers
  • Manage account, view invoices, and pay bills
  • Locate nearby branches
  • Create personalized product lists
Features
Read full description

The CTC Supply app is HVAC Made Easy by giving you access to all your favorite features on http://ctcsupply.com : Quickly check product availability and price View real time inventory and get your specific price right in the palm of your hand. Makes quoting customers and scheduling jobs quick and easy. Quickly buy what you need online Save valuable time by ordering what you need when you need it. Select Pick Up to have your order waiting for you at the branch. Or select Our Truck to schedule a delivery to your shop. Spend your time completing your work, not sitting in a supply house waiting on material. Quickly create bids from your list of materials Select the materials needed to complete your job and create a bid so you know what your costs are. Convert your CTC Supply bid into a bid for your customer with all your information and mark-up. Email it to your customer and close the sale while you are at their house. With the sale completed, convert your CTC Supply bid into an order and the material will be ready when you need it. Quickly manage you CTC Supply accountManage bids to easily place orders for specific jobs. View order status to know when the material for a job will be arriving, allowing you to better schedule your workday. View invoices to know what your job costs are. Select and pay your invoices electronically to save time and better manage your cash flow. View your monthly statement any time anywhere. Everything you need to run your business in the palm of your hand. Quickly find a CTC Supply near you Use the location finder to get directions and phone numbers to the closest branch. Quickly create product lists Create personalized product groups of associated items to make ordering quick and easy. (capacitors, motors, flex, etc.) Open your product group, enter quantities for each item you need and with one click convert it to an order. Don't have a CTC Account? Go to http://ctcsupply.com and download a credit application. Drop it off at your local CTC Supply branch or email it to support@ctcsupply.com.

Screenshots

CTC Supply Mobile4 screens

Verdict

The call

The clearest difference is price: CTC Supply Mobile at Free against NATE ResLoad's $169.99. CTC Supply Mobile also leads on rating (5.0 vs 2.3) and update cadence (every 10 months vs every 31 months). NATE ResLoad's advantage is ratings volume (3 vs 1) and iOS requirement (13.0 vs 15.0). On ads and in-app purchases 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

CTC Supply Mobile is free to download; NATE ResLoad costs $169.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

CTC Supply Mobile holds the better App Store score, 5.0 against 2.3. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

UpkeepUpdate frequency

NATE ResLoad ships an update every 31 months, CTC Supply Mobile every 10 months. The most recent releases landed on October 24, 2026 and October 21, 2026 respectively.

Scorecard7 real differences · 3 level
NATE ResLoad versus CTC Supply Mobile: the parameters behind the verdict, then further details
ParameterNATE ResLoadCTC Supply Mobile
Price$169.99Free — better
Rating2.3 (3 ratings)5.0 (1 ratings) — better
Positive reviews33.3% of reviews—
Number of ratings3 — better1
Update frequencyEvery 31 monthsEvery 10 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPadiPhone, iPad, iPod — better
Requires iOS13.0 — better15.0
Further details — not scored
Size26 MB21 MB
Age rating4+4+
DeveloperCarmel Software CorporationBilltrust

In-app purchases

None

NATE ResLoad

No in-app purchases

None

CTC Supply Mobile

No in-app purchases

Questions

Is NATE ResLoad free?
NATE ResLoad costs $169.99, with no in-app purchases.
Is CTC Supply Mobile free?
CTC Supply Mobile is free to download, with no in-app purchases.
Which has better reviews, NATE ResLoad or CTC Supply Mobile?
CTC Supply Mobile is rated higher. NATE ResLoad averages 2.3 out of 5 from 3 ratings, while CTC Supply Mobile averages 5.0 from 1 ratings.
Do NATE ResLoad or CTC Supply Mobile have ads?
Neither NATE ResLoad nor CTC Supply Mobile shows ads.
Which is updated more often, NATE ResLoad or CTC Supply Mobile?
NATE ResLoad ships an update every 31 months, and CTC Supply Mobile every 10 months. Most recently, NATE ResLoad was updated on October 24, 2026 and CTC Supply Mobile on October 21, 2026.

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