# Fire Pump Calc vs Lobster Log

The clearest difference is in-app purchases: Fire Pump Calc at none against Lobster Log's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Lobster Log sells 2 in-app purchases, starting at $19.99 per month. Fire Pump Calc asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 4 days. The most recent releases landed on October 25, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Fire Pump Calc | Lobster Log |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (4 ratings)](https://appshunter.io/ios/app/fire-pump-calc/id6739542307/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 days | Every 4 days |
| Monetization | Free | — |
| Size | 6 MB | 118 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Justin Medeiros](https://appshunter.io/developer/1782040504) | [Jonathon Nickerson](https://appshunter.io/developer/1866202010) |

## What reviewers say

### Fire Pump Calc

[App page](https://appshunter.io/ios/app/fire-pump-calc/id6739542307)

This professional hydraulic calculator assists fire service professionals and students with complex calculations for pump operations. It accurately determines pump discharge pressure, friction loss, elevation changes, and appliance pressure loss, all designed for real-world fireground scenarios. The app works offline and requires no account for immediate use.

**Highlights:** Pump Discharge Pressure (PDP) calculation, Friction loss for any hose lay, Elevation gain and loss calculation, Appliance pressure loss, Nozzle pressure calculation, Offline functionality, No account required

**Features:** macOS Compatibility

**In-app purchases:** none


### Lobster Log

[App page](https://appshunter.io/ios/app/lobster-log/id6757337342)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LobsterLog | $19.99 | per month |
| LobsterLog | $149.99 | per year |


## Frequently asked questions

### Is Fire Pump Calc free?

Fire Pump Calc is free to download, with no in-app purchases.

### Is Lobster Log free?

Lobster Log is free to download, with in-app purchases available.

### Do Fire Pump Calc or Lobster Log have ads?

Neither Fire Pump Calc nor Lobster Log shows ads.

### Which is updated more often, Fire Pump Calc or Lobster Log?

Fire Pump Calc ships an update every 4 days, and Lobster Log every 4 days. Most recently, Fire Pump Calc was updated on October 25, 2026 and Lobster Log 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.*