# Spool Ethanol Analyzer vs MHD Flasher

The clearest difference is update cadence: MHD Flasher at fortnightly against Spool Ethanol Analyzer's every 13 months. MHD Flasher also leads on rating (4.5 vs 4.1) and review sentiment (65% vs 40%). Spool Ethanol Analyzer's advantage is iOS requirement (11.0 vs 13.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

MHD Flasher holds the better App Store score, 4.5 against 4.1. That said, the two scores are not equally well evidenced: MHD Flasher has 206 ratings behind it against 14, so its average is the more settled of the two. Written reviews point the same way: 40% of Spool Ethanol Analyzer's written reviews are positive against 65% of MHD Flasher's.

Spool Ethanol Analyzer ships an update every 13 months, MHD Flasher fortnightly. The most recent releases landed on October 4, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Spool Ethanol Analyzer | MHD Flasher |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (14 ratings)](https://appshunter.io/ios/app/spool-ethanol-analyzer/id1418992096/reviews) | **[4.5 (206 ratings)](https://appshunter.io/ios/app/mhd-flasher/id1468182144/reviews)** |
| Number of ratings | 14 | **206** |
| Positive reviews | 40.0% of reviews | **65.1% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Fortnightly** |
| Monetization | Free | Free |
| Size | 9 MB | 239 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ajay Rajeev](https://appshunter.io/developer/1418992095) | [MHD Tuning UG (haftungsbeschraenkt)](https://appshunter.io/developer/1445162439) |

## What reviewers say

### Spool Ethanol Analyzer

[App page](https://appshunter.io/ios/app/spool-ethanol-analyzer/id1418992096)

This application connects to a wireless sensor kit to measure in-tank ethanol content and fuel temperature. It also features a mixing ratio calculator that can be used independently of the sensor hardware.

**Highlights:** Connects to Spool Wireless Ethanol Sensor Kit, Measures in-tank ethanol content, Measures fuel temperature, Includes mixing ratio calculator, Uses Low energy Bluetooth protocols, Fast and reliable data

**Features:** macOS Compatibility

**In-app purchases:** none


### MHD Flasher

[App page](https://appshunter.io/ios/app/mhd-flasher/id1468182144)

This app allows for complete DME remapping of BMW vehicles, offering maximum performance and safety. It provides full OBD flashing, pre-configured performance maps, and advanced engine monitoring capabilities. Users can also customize various flash options for a personalized driving experience.

**Highlights:** Complete DME remapping, Full OBD flashing, Pre-configured performance maps (Stage 1, 2, E85), Advanced engine monitoring, Customizable flash options, Revert to factory OEM flash

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Fast flashing speeds (16-30 seconds)
- 👍 User-friendly interface and intuitive design
- 💪 Significant power gains and performance improvements
- 🎯 Excellent OTS (off-the-shelf) maps with multiple fuel options
- 📊 Comprehensive data logging and monitoring capabilities

**What reviewers complain about**

- 🐛 Frequent app crashes and stability issues
- ❌ Recent update broke core functionality for many users
- 🔌 Connection problems with WiFi adapters
- 📵 Unable to open app after recent updates
- 😞 Poor customer support responsiveness (recent)

**Reported bugs**

- App crashes on iOS 26.2 and newer versions
- Unable to flash after recent updates
- Unable to erase memory errors
- App fails to open after installation
- Connection constantly disconnects on N55 F30 platform

**Requested features**

- Add 94 octane fuel option
- Support for diesel engines
- Support for N63 engine tuning
- Max cooling fan option in new app
- Ability to change login email/username


## Frequently asked questions

### Is Spool Ethanol Analyzer free?

Spool Ethanol Analyzer is free to download, with no in-app purchases.

### Is MHD Flasher free?

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

### Which has better reviews, Spool Ethanol Analyzer or MHD Flasher?

MHD Flasher is rated higher. Spool Ethanol Analyzer averages 4.1 out of 5 from 14 ratings, while MHD Flasher averages 4.5 from 206 ratings.

### Do Spool Ethanol Analyzer or MHD Flasher have ads?

Neither Spool Ethanol Analyzer nor MHD Flasher shows ads.

### Which is updated more often, Spool Ethanol Analyzer or MHD Flasher?

Spool Ethanol Analyzer ships an update every 13 months, and MHD Flasher fortnightly. Most recently, Spool Ethanol Analyzer was updated on October 4, 2026 and MHD Flasher on October 9, 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.*