# ACHD Connect vs Blue Def Decoder

The clearest difference is price: ACHD Connect at Free against Blue Def Decoder's $3.99. ACHD Connect also leads on rating (5.0 vs 3.0) and update cadence (every 2 months vs every 5 months). Blue Def Decoder's advantage is chart position (#173 vs unranked) and iOS requirement (15.1 vs 18.0). On ratings volume, ads, in-app purchases and device support there is nothing between them.

ACHD Connect 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.

ACHD Connect holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 6 and 6 respectively.

ACHD Connect ships an update every 2 months, Blue Def Decoder every 5 months. The most recent releases landed on October 4, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | ACHD Connect | Blue Def Decoder |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | **[5.0 (6 ratings)](https://appshunter.io/ios/app/achd-connect/id6740369834/reviews)** | [3.0 (6 ratings)](https://appshunter.io/ios/app/blue-def-decoder/id6751862301/reviews) |
| Number of ratings | 6 | 6 |
| Positive reviews | — | 60.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | **Free** | Paid |
| Best chart rank | — | **#173** |
| Size | 145 MB | 20 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Ada County Highway District](https://appshunter.io/developer/588942120) | [Mako Technology Labs](https://appshunter.io/developer/1832176903) |

## What reviewers say

### ACHD Connect

[App page](https://appshunter.io/ios/app/achd-connect/id6740369834)

Easily submit comments, concerns, and questions directly to highway district staff. This app provides a convenient channel for residents to communicate with officials about road-related issues.

**Highlights:** Submit comments and concerns, Direct communication with staff, Convenient reporting, Road issue submission

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is ACHD Connect free?

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

### Is Blue Def Decoder free?

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

### Which has better reviews, ACHD Connect or Blue Def Decoder?

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

### Do ACHD Connect or Blue Def Decoder have ads?

Neither ACHD Connect nor Blue Def Decoder shows ads.

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

ACHD Connect ships an update every 2 months, and Blue Def Decoder every 5 months. Most recently, ACHD Connect was updated on October 4, 2026 and Blue Def Decoder 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.*