# iAttenuation vs FireOps Calc

The clearest difference is rating: FireOps Calc at 5.0 against iAttenuation's 3.0. FireOps Calc also leads on update cadence (weekly vs every 69 months) and price ($1.99 vs $2.99). On ratings volume, ads, in-app purchases and device support there is nothing between them.

iAttenuation costs $2.99 and FireOps Calc $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

FireOps Calc holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 2 respectively.

iAttenuation ships an update every 69 months, FireOps Calc weekly. The most recent releases landed on October 31, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | iAttenuation | FireOps Calc |
| --- | --- | --- |
| Price | $2.99 | **$1.99** |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/iattenuation/id305626528/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/fireops-calc-engineer-console/id6753922160/reviews)** |
| Number of ratings | 2 | 2 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 69 months | **Weekly** |
| Monetization | Paid | **Free** |
| Size | 1 MB | 26 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Black Cat Systems](https://appshunter.io/developer/301047032) | [David Gallaher](https://appshunter.io/developer/1845724915) |

## What reviewers say

### iAttenuation

[App page](https://appshunter.io/ios/app/iattenuation/id305626528)

This app calculates resistor values for various passive attenuator networks. It supports T, Pi, H, O, and Minimum Loss Pad configurations, allowing users to input impedance and desired attenuation. It can also adjust resistor values to standard tolerances.

**Highlights:** Calculates resistor values for passive attenuator networks, Supports Tee, Pi, H, O, and Minimum Loss Pad configurations, Input and output impedance calculation, Desired attenuation input, Adjusts resistor values to standard tolerances (1%, 5%, 10%)

**Features:** macOS Compatibility

**In-app purchases:** none


### FireOps Calc

[App page](https://appshunter.io/ios/app/fireops-calc-engineer-console/id6753922160)

This app simplifies fire pump calculations and provides essential fireground tools for operators. It features an improved home screen for quick access to calculators, expanded tools for common calculations, and enhanced hose line management.

**Highlights:** Pump Calculator, Fireground Tools, Department Setup, Pump Card, Hose line editing, Standpipe calculations

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

**In-app purchases:** none


## Frequently asked questions

### Is iAttenuation free?

iAttenuation costs $2.99, with no in-app purchases.

### Is FireOps Calc free?

FireOps Calc costs $1.99, with no in-app purchases.

### Which has better reviews, iAttenuation or FireOps Calc?

FireOps Calc is rated higher. iAttenuation averages 3.0 out of 5 from 2 ratings, while FireOps Calc averages 5.0 from 2 ratings.

### Do iAttenuation or FireOps Calc have ads?

Neither iAttenuation nor FireOps Calc shows ads.

### Which is updated more often, iAttenuation or FireOps Calc?

iAttenuation ships an update every 69 months, and FireOps Calc weekly. Most recently, iAttenuation was updated on October 31, 2026 and FireOps Calc on October 30, 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.*