iAttenuation vs FireOps Calc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iAttenuation
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.
- 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%)
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Passive attenuators are two port / four terminal resistive networks that are designed to reduce (or attenuate, hence their name) the power between a source and load. They can also match the impedance between the source and load. They are used in a variety of audio and radio / RF applications. iAttenuation calculates resistor values for the following types of attenuator networks: Tee Network Pi Network H (Balanced Tee) O (Balanced Pi) Minimum Loss Pad Just enter in the input and output impedance values, and the desired attenuation, and iAttenuation does the rest! iAttenuation can also adjust the calculated resistor values to match the nearest standard 1%, 5%, or 10% tolerance values.
FireOps Calc
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.
- Pump Calculator
- Fireground Tools
- Department Setup
- Pump Card
- Hose line editing
- Standpipe calculations
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This update improves FireOps Calc with a cleaner home screen, expanded fireground tools, and easier pump calculator controls. New and improved: - New home screen with quick access to Pump Calculator, Fireground Tools, Department Setup, and Pump Card - Added expanded Fireground Tools for common pump/operator calculations and reference - Improved line editing so active hose lines are easier to open, edit, and close - Improved Flow On/Off visibility while editing lines - Updated standpipe floor elevation logic - Improved portable master stream two-line supply calculations - Fixed friction loss updates when changing hose length on portable master stream layouts - General UI polish and reliability improvements
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | iAttenuation | FireOps Calc |
|---|---|---|
| Price | $2.99 | $1.99 — better |
| Rating | 3.0 (2 ratings) | 5.0 (2 ratings) — better |
| Number of ratings | 2 | 2 |
| Update frequency | Every 69 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 1 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | Black Cat Systems | David Gallaher |
Customer experience
iAttenuation
FireOps Calc
In-app purchases
iAttenuation
No in-app purchases
FireOps Calc
No in-app purchases
