# Calculadora de BTU vs Security Fenix

The clearest difference is iOS requirement: Security Fenix at 13.0 against Calculadora de BTU's 15.0. On price, update cadence, ads and in-app purchases 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 ships an update every 4 months, Security Fenix every 2 months. The most recent releases landed on October 21, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Calculadora de BTU | Security Fenix |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/calculadora-de-btu/id6469011224/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Ad-supported | — |
| Size | 65 MB | 68 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Matheus Estoque](https://appshunter.io/developer/1589462723) | [ECONDOS SISTEMAS LTDA - ME](https://appshunter.io/developer/1144142573) |

## What reviewers say

### 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


### Security Fenix

[App page](https://appshunter.io/ios/app/security-fenix/id6747032839)

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

**In-app purchases:** none


## Frequently asked questions

### Is Calculadora de BTU free?

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

### Is Security Fenix free?

Security Fenix is free to download, with no in-app purchases.

### Do Calculadora de BTU or Security Fenix have ads?

Neither Calculadora de BTU nor Security Fenix shows ads.

### Which is updated more often, Calculadora de BTU or Security Fenix?

Calculadora de BTU ships an update every 4 months, and Security Fenix every 2 months. Most recently, Calculadora de BTU was updated on October 21, 2026 and Security Fenix on October 17, 2026.

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