Hydronic vs The B
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Hydronic
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Hydronic HVAC Toolkit App is a tool that provides most common info on a range of HVAC equipment manufactured by Modine (unit heaters – gas-fired, steam/hot-water, electric), Koldwave (portable ACs), Reflected Heat Design (infrared tube heaters), Radiant Electric Heat (infrared), Continental Fans, ThermoTek (kitchen heating & ventilation systems), RBI (boilers / hot water heaters), KN Series (cast iron boilers). You can find info such as combustion, electrical, venting, dimensions, weight, clearance to combustibles, common parts list, etc. on Modine unit heaters; competitive cross-reference for infrared tube heaters and more. Also, new in this revision is a Make-Up Air Selection Form that allows you to quickly submit specs and pics for a reliable, application accurate quote. You also receive specs submitted via the form, emailed to you for your records. Hydronic Toolkit app is a quick reference guide for engineers specifying Modine unit heaters in HVAC projects, Modine re-sellers (counter sales, outside sales) selling Modine unit heaters and contractors installing them. It allows quick access to Modine unit heater specs on-site or when you are not in front of a PC/laptop. At your fingertips is info available on all these Modine unit heaters – a) Eleven gas-fired models, sizes available from 30,000-400,000 Btu/hr. input b) Seven steam/hot-water models, sizes available from 18,000-952,000 Btu/hr. (@ 2psi steam) c) Four electric models, sizes available from 5-50 kW
The B
This app serves HVAC/R contractors with a comprehensive resource for products, expert support, and troubleshooting. It offers training, NATE testing, and field tools, representing hundreds of manufacturers across Michigan and Northwest Ohio.
- Vast product inventory
- Expert support and troubleshooting
- Contractor training
- NATE testing
- Field tools and calculators
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Behler-Young is the complete source for the HVAC/R™ contractor. This means that in addition to our vast inventory of products, we provide expert support and troubleshooting, training for our customers, NATE testing, tools and calculators you can use in the field and on the job, and more! B-Y represents hundreds of manufacturers and we serve thousands of customers throughout Michigan and Northwest Ohio, through 16 branches and a 150,000 square foot distribution center in Kensington Park.
Screenshots
Verdict
The clearest difference is ads: Hydronic at none against The B's shown. Hydronic also leads on update cadence (weekly vs every 9 months) and iOS requirement (12.1 vs 15.0). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Hydronic ships an update weekly, The B every 9 months. The most recent releases landed on October 6, 2026 and October 24, 2026 respectively.
| Parameter | Hydronic | The B |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (4 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 4 — better |
| Update frequency | Weekly — better | Every 9 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | — | Ad-supported |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.1 — better | 15.0 |
| Further details — not scored | ||
| Size | 2 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Philip Antecol | The Behler-Young Company |
In-app purchases
Hydronic
No in-app purchases
The B
No in-app purchases









