# OBDeleven vs simos.app

The clearest difference is rating: simos.app at 5.0 against OBDeleven's 4.3. simos.app also leads on monetization model (free vs free with in-app purchases) and update cadence (weekly vs fortnightly). OBDeleven's advantage is ratings volume (1.6K vs 2) and chart position (#169 vs unranked). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. OBDeleven sells 10 in-app purchases, starting at $69.99 per year and simos.app sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

simos.app holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: OBDeleven has 1.6K ratings behind it against 2, so its average is the more settled of the two.

OBDeleven ships an update fortnightly, simos.app weekly. The most recent releases landed on November 11, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | OBDeleven | simos.app |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (1.6K ratings)](https://appshunter.io/ios/app/obdeleven-obd2-car-scanner/id1643119107/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/simosapp/id6760018423/reviews)** |
| Number of ratings | **1.6K** | 2 |
| Positive reviews | 13.9% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Weekly** |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#169** | — |
| Size | 252 MB | 7 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [OBDeleven UAB](https://appshunter.io/developer/1458334122) | [Tycho Sebastian Holzer](https://appshunter.io/developer/1882338941) |

## What reviewers say

### OBDeleven

[App page](https://appshunter.io/ios/app/obdeleven-obd2-car-scanner/id1643119107)

**Currently charting:** #169 Top Grossing · Utilities (US App Store)

Transform your smartphone into a powerful car diagnostic and customization tool. Easily scan trouble codes, monitor live data, and access advanced features like coding and service functions for a wide range of car brands. Save time and money on car maintenance and personalization.

**Highlights:** Basic OBD2 diagnostics, Live data monitoring, Advanced diagnostics for licensed brands, One-Click Apps for customization, Vehicle history and VIN data, Maintenance and comfort features

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO plan | $69.99 | per year |
| ULTIMATE plan | $239.99 | per year |
| 10 Credits | $3.99 | one-time |
| 100 Credits | $29.99 | one-time |
| 1000 Shadowing Credits | $34.99 | one-time |
| PRO plan subscription | $69.99 | one-time |
| 500 Credits | $90.99 | one-time |
| 5000 Shadowing Credits | $139.99 | one-time |
| ULTIMATE plan subscription | $239.99 | one-time |
| 10000 Shadowing Credits | $269.99 | one-time |

**What reviewers like**

- 🚀 Helpful diagnostic tool
- 👍 Easy to use
- 💡 Useful features for VW/Audi owners

**What reviewers complain about**

- 🐛 Compatibility issues with newer devices/OS
- 💰 Expensive credits/subscription model
- 🔍 Limited functionality compared to alternatives
- 🤖 Poor customer support
- 🔧 Unreliable/buggy performance

**Reported bugs**

- App crashes on login
- Inability to change vehicle type
- Functionality breaks after updates

**Requested features**

- Restore free access to core features
- Improve compatibility with more vehicle makes/models
- Add more diagnostic and coding capabilities


### simos.app

[App page](https://appshunter.io/ios/app/simosapp/id6760018423)

This tool provides diagnostic, data logging, and flashing capabilities for VAG petrol engines with specific Simos ECUs. It allows real-time monitoring of engine parameters, ECU identification, and analysis of recorded data through multi-channel graphs. Users can also update their ECU with stock or custom tunes.

**Highlights:** Real-time ECU parameter logging, ECU identification and info, Multi-channel log analysis graphs, ECU and TCU flashing, Support for Simos 18.x and 12.1 ECUs

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| App VIN Unlock | $17.99 | one-time |
| Wizard: Pops & Bangs - Single Bin | $17.99 | one-time |
| Stage 1 Bin | $179.99 | one-time |


## Frequently asked questions

### Is OBDeleven free?

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

### Is simos.app free?

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

### Which has better reviews, OBDeleven or simos.app?

simos.app is rated higher. OBDeleven averages 4.3 out of 5 from 1.6K ratings, while simos.app averages 5.0 from 2 ratings.

### Do OBDeleven or simos.app have ads?

Neither OBDeleven nor simos.app shows ads.

### Which is updated more often, OBDeleven or simos.app?

OBDeleven ships an update fortnightly, and simos.app weekly. Most recently, OBDeleven was updated on November 11, 2026 and simos.app on November 6, 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.*