# RedlineAi vs OBD Vault

The clearest difference is update cadence: RedlineAi at every 2 days against OBD Vault's weekly. OBD Vault's advantage is iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. RedlineAi sells 6 in-app purchases, starting at $2.99 per month and OBD Vault sells 9 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

RedlineAi ships an update every 2 days, OBD Vault weekly. Both last shipped on October 31, 2026.

## The numbers

| Metric | RedlineAi | OBD Vault |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/redlineai-ai-obd-diagnostics/id6785606784/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Weekly |
| Monetization | Free with in-app purchases | — |
| Size | 15 MB | 41 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kirolos Yacob](https://appshunter.io/developer/6785606786) | [Bahdan Hal](https://appshunter.io/developer/6808813418) |

## What reviewers say

### RedlineAi

[App page](https://appshunter.io/ios/app/redlineai-ai-obd-diagnostics/id6785606784)

This app transforms your phone into a professional OBD-II scanner, providing AI-powered explanations for check-engine lights, repair cost estimates, and DIY repair guides. It also includes a recall checker and a vehicle maintenance tracker.

**Highlights:** AI-powered OBD-II diagnostics, Repair cost estimates, DIY repair guides, Recall checker, Vehicle maintenance tracker, Live engine data, Trouble code library

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Silver | $2.99 | per month |
| Gold | $19.99 | per month |
| Silver (Annual) | $29.99 | per year |
| Diamond | $34.99 | per month |
| Gold (Annual) | $199.99 | per year |
| Diamond (Annual) | $349.99 | per year |


### OBD Vault

[App page](https://appshunter.io/ios/app/obd-vault/id6808813416)

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 vehicle · Per month | $2.99 | per month |
| 3 vehicles · Per month | $5.99 | per month |
| 10 vehicles · Per month | $14.95 | per month |
| 1 vehicle · Per year | $17.99 | per year |
| 3 vehicles · Per year | $35.99 | per year |
| 10 vehicles · Per year | $89.99 | per year |
| 1 vehicle · Lifetime | $34.99 | one-time |
| 3 vehicles · Lifetime | $69.99 | one-time |
| 10 vehicles · Lifetime | $174.99 | one-time |


## Frequently asked questions

### Is RedlineAi free?

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

### Is OBD Vault free?

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

### Do RedlineAi or OBD Vault have ads?

Neither RedlineAi nor OBD Vault shows ads.

### Which is updated more often, RedlineAi or OBD Vault?

RedlineAi ships an update every 2 days, and OBD Vault weekly. Most recently, RedlineAi was updated on October 31, 2026 and OBD Vault on October 31, 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.*