# SimfyAI Data vs OBD2 Ninja

The clearest difference is price: SimfyAI Data at Free against OBD2 Ninja's $0.99. OBD2 Ninja's advantage is update cadence (every 3 days vs monthly). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

SimfyAI Data is free to download; OBD2 Ninja costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SimfyAI Data ships an update monthly, OBD2 Ninja every 3 days. The most recent releases landed on October 2, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | SimfyAI Data | OBD2 Ninja |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 days** |
| Size | 2.2 GB | 3 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Yanxu Xie](https://appshunter.io/developer/1449703818) | [Cory Green](https://appshunter.io/developer/1656262598) |

## What reviewers say

### SimfyAI Data

[App page](https://appshunter.io/ios/app/simfyai-data/id6670199269)

**Features:** macOS Compatibility

**In-app purchases:** none


### OBD2 Ninja

[App page](https://appshunter.io/ios/app/obd2-ninja-car-code-reader/id6794873767)

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

**In-app purchases:** none


## Frequently asked questions

### Is SimfyAI Data free?

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

### Is OBD2 Ninja free?

OBD2 Ninja costs $0.99, with no in-app purchases.

### Do SimfyAI Data or OBD2 Ninja have ads?

Neither SimfyAI Data nor OBD2 Ninja shows ads.

### Which is updated more often, SimfyAI Data or OBD2 Ninja?

SimfyAI Data ships an update monthly, and OBD2 Ninja every 3 days. Most recently, SimfyAI Data was updated on October 2, 2026 and OBD2 Ninja on September 22, 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.*