Low vs AC Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Low
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Low-GWP Tool is now part of the new Ref Tools app, our essential, all-in-one mobile app for air conditioning and refrigeration technicians. Ref Tools gives you access to the tools, guidance, support, and information you need—on the job and in the field. Download Ref Tools to access the latest version of Low-GWP Tool. Retrofitting refrigeration systems to more climate-friendly refrigerants is much easier with the right tools in hand—and the first one you should reach for is Low-GWP Tool. Low-GWP Tool ensures compatibility with the TXV and uses a simple calculation to show the indicative capacity difference of a retrofit refrigerant. Simply enter basic information like TXV type, current refrigerant, operating range, and retrofit refrigerant, and Low-GWP Tool will verify that your refrigerant choice is efficient, environmentally friendly, and compatible. Support For app support, please use the in-app feedback function found in the app settings or send an email to coolapp@danfoss.com Engineering Tomorrow Danfoss engineers advanced technologies that enable us to build a better, smarter and more efficient tomorrow. In the world’s growing cities, we ensure the supply of fresh food and optimal comfort in our homes and offices, while meeting the need for energy-efficient infrastructure, connected systems and integrated renewable energy. Our solutions are used in such areas as refrigeration, air conditioning, heating, motor control and mobile machinery. Our innovative engineering dates back to 1933 and today, Danfoss holds market-leading positions, employing 28,000 people and serving customers in more than 100 countries. We are privately held by the founding family. Read more about us at www.danfoss.com. Terms and Conditions apply for use of the app.
AC Calculator
This utility app simplifies HVAC sizing by calculating BTU/h capacity and recommending equipment. It offers unit conversions, price estimates, and energy consumption comparisons. Advanced features can be unlocked via in-app purchases.
- Calculate BTU/h capacity
- Recommend equipment types
- Convert BTU, kW, Kcal, Tons
- Check price estimates
- Compare inverter vs. conventional
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AC Calculator makes HVAC sizing simple. Quickly calculate BTU/h capacity, get recommended equipment types, convert between BTU, kW, Kcal and Tons, check up-to-date price estimates, and compare inverter vs. conventional energy consumption. Unlock professional-grade features anytime with in-app purchases.
Screenshots
Verdict
The clearest difference is in-app purchases: Low at none against AC Calculator's 2. Low also leads on iOS requirement (11.0 vs 18.6). On price, update cadence, ads 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. AC Calculator sells 2 one-off in-app purchases. Low asks for nothing beyond the download.
Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.
| Parameter | Low | AC Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.8 (20 ratings) — better |
| Number of ratings | — | 20 — better |
| Update frequency | Every 4 months | Every 4 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 53 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Danfoss A/S | Melchisedec Martinez Rodriguez |
In-app purchases
Low
No in-app purchases
AC Calculator
- Unlock View details$4.99
- Unlock Advanced mode$9.99
