# ShiftLock vs Cat DB

The clearest difference is review sentiment: Cat DB at 100% against ShiftLock's 35%. Cat DB also leads on price (Free vs $6.99) and rating (4.7 vs 3.3). ShiftLock's advantage is in-app purchases (none vs 12) and chart position (#29 vs #91). On ratings volume, device support and iOS requirement there is nothing between them.

Cat DB is free to download; ShiftLock costs $6.99 up front. Cat DB sells 12 in-app purchases, starting at $1.99 per month. ShiftLock asks for nothing beyond the download.

Cat DB holds the better App Store score, 4.7 against 3.3. Both are backed by a comparable volume of ratings — 42 and 69 respectively. Written reviews point the same way: 35% of ShiftLock's written reviews are positive against 100% of Cat DB's.

ShiftLock ships an update every 5 months, Cat DB every 3 weeks. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | ShiftLock | Cat DB |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| Rating | [3.3 (42 ratings)](https://appshunter.io/ios/app/shiftlock/id1080928307/reviews) | **[4.7 (69 ratings)](https://appshunter.io/ios/app/cat-db-catalytic-converters/id1665881530/reviews)** |
| Number of ratings | 42 | **69** |
| Positive reviews | 35.1% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Best chart rank | **#29** | #91 |
| Size | 55 MB | 154 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Mark Knowles](https://appshunter.io/developer/1080928306) | [D8ta Technologies LLC](https://appshunter.io/developer/1665881532) |

## What reviewers say

### ShiftLock

[App page](https://appshunter.io/ios/app/shiftlock/id1080928307)

**Currently charting:** #29 Top Paid · Reference (US App Store)

Access a vast database of vehicle electronic shift information for models from 1985 to the present. Quickly find solutions to avoid towing, reduce vehicle damage, and save time roadside. Content is updated regularly for accuracy.

**Highlights:** Extensive vehicle model database, USA, European, and foreign models, 1985 to current electronic shifts, Reduce towing and vehicle damage, Save release information offline, Fast learning curve

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

**In-app purchases:** none


### Cat DB

[App page](https://appshunter.io/ios/app/cat-db-catalytic-converters/id1665881530)

**Currently charting:** #91 Top Grossing · Reference (US App Store)

This app provides real-time pricing for catalytic converters, drawing from a vast database of cars and converter listings. It offers tools for searching by VIN or vehicle details, viewing detailed photos, and comparing market prices. Users can manage their findings in a customizable cart and access support for identifying parts.

**Highlights:** Search by VIN or vehicle year/make/model, View 62,000+ zoomable photos, Get live market pricing, Search by partial or no code, 3D models for OEM confirmation, Customizable price margins, View buyers near you

**Features:** Vision Pro support

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Level 0 | $1.99 | per month |
| Level 1 | $11.99 | per month |
| Level 1 | $11.99 | per month |
| Level 2 | $19.99 | per month |
| Level 0 | $19.99 | per year |
| Level 3 | $29.99 | per month |
| Level 1 | $63.99 | per 6 months |
| Level 2 | $107.99 | per 6 months |
| Level 1 | $114.99 | per year |
| Level 3 | $161.99 | per 6 months |
| Level 2 | $191.99 | per year |
| Level 3 | $289.99 | per year |


## Frequently asked questions

### Is ShiftLock free?

ShiftLock costs $6.99, with no in-app purchases.

### Is Cat DB free?

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

### Which has better reviews, ShiftLock or Cat DB?

Cat DB is rated higher. ShiftLock averages 3.3 out of 5 from 42 ratings, while Cat DB averages 4.7 from 69 ratings.

### Do ShiftLock or Cat DB have ads?

ShiftLock shows ads; Cat DB does not.

### Which is updated more often, ShiftLock or Cat DB?

ShiftLock ships an update every 5 months, and Cat DB every 3 weeks. Most recently, ShiftLock was updated on October 29, 2026 and Cat DB on October 30, 2026.

### Which is more popular, ShiftLock or Cat DB?

ShiftLock currently peaks at #29 in the App Store charts, and Cat DB at #91. Chart position reflects recent download velocity rather than total install base.

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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.*