# Blue Def Decoder vs PumpOps

The clearest difference is price: PumpOps at Free against Blue Def Decoder's $3.99. PumpOps also leads on rating (5.0 vs 3.0) and update cadence (every 10 days vs every 5 months). Blue Def Decoder's advantage is chart position (#173 vs unranked) and ratings volume (6 vs 1). On ads, in-app purchases and iOS requirement there is nothing between them.

PumpOps is free to download; Blue Def Decoder costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

PumpOps holds the better App Store score, 5.0 against 3.0. That said, the two scores are not equally well evidenced: Blue Def Decoder has 6 ratings behind it against 1, so its average is the more settled of the two.

Blue Def Decoder ships an update every 5 months, PumpOps every 10 days. Both last shipped on September 23, 2026.

## The numbers

| Metric | Blue Def Decoder | PumpOps |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | [3.0 (6 ratings)](https://appshunter.io/ios/app/blue-def-decoder/id6751862301/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pumpops/id6798931183/reviews)** |
| Number of ratings | **6** | 1 |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 10 days** |
| Monetization | Paid | **Free** |
| Best chart rank | **#173** | — |
| Size | 20 MB | 9 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Mako Technology Labs](https://appshunter.io/developer/1832176903) | [TREVOR GREENWOOD WILLIAMS](https://appshunter.io/developer/6798931185) |

## What reviewers say

### Blue Def Decoder

[App page](https://appshunter.io/ios/app/blue-def-decoder/id6751862301)

**Currently charting:** #173 Top Paid · Utilities (US App Store)

Instantly determine the freshness of your Diesel Exhaust Fluid (DEF) by entering the code from your container. This app helps you confirm DEF hasn't expired, track shelf life, and verify vehicle compliance, removing guesswork for diesel vehicle owners.

**Highlights:** Check DEF freshness, Enter 5-11 character codes, View manufacturing date, See freshness status, Track shelf life, Verify vehicle compliance

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

**In-app purchases:** none


### PumpOps

[App page](https://appshunter.io/ios/app/pumpops/id6798931183)

This app quickly calculates engine pressure for fire apparatus engineers and operator candidates. It allows users to select nozzles, hoses, and layouts to instantly update pump discharge pressure, with a clear breakdown of the equation used. It also includes reference and training tools for various fireground hydraulics.

**Highlights:** Instant PSI calculation, Live equation breakdown, Friction loss per 100', Supports various nozzles and hose lays, Appliance and elevation calculations, Interactive formula calculators, Customizable themes and presets

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Blue Def Decoder free?

Blue Def Decoder costs $3.99, with no in-app purchases.

### Is PumpOps free?

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

### Which has better reviews, Blue Def Decoder or PumpOps?

PumpOps is rated higher. Blue Def Decoder averages 3.0 out of 5 from 6 ratings, while PumpOps averages 5.0 from 1 ratings.

### Do Blue Def Decoder or PumpOps have ads?

Neither Blue Def Decoder nor PumpOps shows ads.

### Which is updated more often, Blue Def Decoder or PumpOps?

Blue Def Decoder ships an update every 5 months, and PumpOps every 10 days. Most recently, Blue Def Decoder was updated on September 23, 2026 and PumpOps on September 23, 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.*