# Lewis vs ForgePilot Diagnostics

The clearest difference is in-app purchases: ForgePilot Diagnostics at none against Lewis's 2. Lewis's advantage is update cadence (every 3 days vs fortnightly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Lewis sells 2 in-app purchases, starting at $12.99 per month. ForgePilot Diagnostics asks for nothing beyond the download.

Lewis ships an update every 3 days, ForgePilot Diagnostics fortnightly. The most recent releases landed on November 7, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Lewis | ForgePilot Diagnostics |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/lewis-ai-obd2-car-scanner/id6759301769/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 days** | Fortnightly |
| Monetization | Freemium | — |
| Size | 86 MB | 38 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kunolu Applications](https://appshunter.io/developer/1874814868) | [Crimson Forge Inc](https://appshunter.io/developer/1896609772) |

## What reviewers say

### Lewis

[App page](https://appshunter.io/ios/app/lewis-ai-obd2-car-scanner/id6759301769)

This app connects to your car via a Bluetooth OBD2 adapter to diagnose issues in plain English. It uses AI to analyze trouble codes, provide severity ratings, and offer maintenance advice. You can also monitor live engine data and track your car's health over time.

**Highlights:** Plain English code explanations, AI-powered diagnostic analysis, Conversational AI mechanic, Live engine data monitoring, Car health tracking over time, Works with 1996+ OBD-II vehicles

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lewis Monthly | $12.99 | per month |
| Lewis Annual | $69.99 | per year |


### ForgePilot Diagnostics

[App page](https://appshunter.io/ios/app/forgepilot-diagnostics/id6768842315)

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

**In-app purchases:** none


## Frequently asked questions

### Is Lewis free?

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

### Is ForgePilot Diagnostics free?

ForgePilot Diagnostics is free to download, with no in-app purchases.

### Do Lewis or ForgePilot Diagnostics have ads?

Neither Lewis nor ForgePilot Diagnostics shows ads.

### Which is updated more often, Lewis or ForgePilot Diagnostics?

Lewis ships an update every 3 days, and ForgePilot Diagnostics fortnightly. Most recently, Lewis was updated on November 7, 2026 and ForgePilot Diagnostics on November 5, 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.*