# Ref Tools vs Calculadora de BTU

The clearest difference is rating: Calculadora de BTU at 5.0 against Ref Tools's 3.9. Ref Tools's advantage is ratings volume (52 vs 2) and update cadence (every 5 weeks vs every 4 months). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Calculadora de BTU holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: Ref Tools has 52 ratings behind it against 2, so its average is the more settled of the two.

Ref Tools ships an update every 5 weeks, Calculadora de BTU every 4 months. Both last shipped on October 21, 2026.

## The numbers

| Metric | Ref Tools | Calculadora de BTU |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (52 ratings)](https://appshunter.io/ios/app/ref-tools/id472312541/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/calculadora-de-btu/id6469011224/reviews)** |
| Number of ratings | **52** | 2 |
| Positive reviews | 57.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 4 months |
| Monetization | **Free** | Ad-supported |
| Size | 98 MB | 65 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Danfoss A/S](https://appshunter.io/developer/423984644) | [Matheus Estoque](https://appshunter.io/developer/1589462723) |

## What reviewers say

### Ref Tools

[App page](https://appshunter.io/ios/app/ref-tools/id472312541)

This app provides HVACR technicians with essential tools and information for field service. It includes refrigerant calculators, troubleshooting guides, product finders, and access to spare parts. Listen to educational podcasts to enhance your knowledge on the go.

**Highlights:** Refrigerant Slider for P/T calculations, Solenoid valve coil testing tool, Refrigeration system troubleshooting guide, Product data finder, Spare parts ordering, Low-GWP refrigerant comparison, TXV Superheat optimization, Educational podcasts

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Useful tool for HVAC/R techs
- 👍 Great idea for an app
- 👍 Best refrigeration and hvac app
- 👍 Useful App for HVACR
- 👍 Brilliant app

**What reviewers complain about**

- 🐛 Crashes instantly on launch
- 🐛 App won’t open on iPhone
- 🐛 Flashes up and disappears
- 🐛 Cannot open app
- 🐛 Immediately shuts off

**Reported bugs**

- CRASHED instantly on Mac Mini M4
- App won’t open on iPhone
- App flashes up and disappears
- Cannot open app
- Immediately shuts off since recent release

**Requested features**

- More residential AC information
- Troubleshooter for Residential & Commercial
- Add SP22 refrigerant
- Add R-11 refrigerant
- Add R-123 range down to 40 degrees


### Calculadora de BTU

[App page](https://appshunter.io/ios/app/calculadora-de-btu/id6469011224)

This utility helps you determine the optimal air conditioner BTU capacity for any room. It considers factors like area, ceiling height, occupancy, sun exposure, and electronics to suggest the ideal power, preventing under or overspending on energy.

**Highlights:** BTU calculation for air conditioners, Ideal power estimation, Environmental data analysis, Appliance configuration suggestions, Monthly energy cost estimate, 12/24 month spending projection, Simple and intuitive interface

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Ref Tools free?

Ref Tools is free to download, with no in-app purchases.

### Is Calculadora de BTU free?

Calculadora de BTU is free to download, with no in-app purchases.

### Which has better reviews, Ref Tools or Calculadora de BTU?

Calculadora de BTU is rated higher. Ref Tools averages 3.9 out of 5 from 52 ratings, while Calculadora de BTU averages 5.0 from 2 ratings.

### Do Ref Tools or Calculadora de BTU have ads?

Neither Ref Tools nor Calculadora de BTU shows ads.

### Which is updated more often, Ref Tools or Calculadora de BTU?

Ref Tools ships an update every 5 weeks, and Calculadora de BTU every 4 months. Most recently, Ref Tools was updated on October 21, 2026 and Calculadora de BTU on October 21, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*