# Lock Checker vs Centered Cardboard

The clearest difference is price: Centered Cardboard at Free against Lock Checker's $0.99. Centered Cardboard also leads on ratings volume (60 vs 2). Lock Checker's advantage is in-app purchases (none vs 1) and update cadence (every 2 days vs every 3 weeks). On rating, review sentiment, ads and device support there is nothing between them.

Centered Cardboard is free to download; Lock Checker costs $0.99 up front. Centered Cardboard sells 1 one-off in-app purchase. Lock Checker asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Lock Checker against 4.9 for Centered Cardboard. That said, the two scores are not equally well evidenced: Centered Cardboard has 60 ratings behind it against 2, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

Lock Checker ships an update every 2 days, Centered Cardboard every 3 weeks. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Lock Checker | Centered Cardboard |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/lock-checker/id6757445763/reviews)** | [4.9 (60 ratings)](https://appshunter.io/ios/app/centered-cardboard/id6759780836/reviews) |
| Number of ratings | 2 | **60** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 3 weeks |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 35 MB | 18 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hrachya Harutyunyan](https://appshunter.io/developer/1866999437) | [Oak Labs Limited Liability Company](https://appshunter.io/developer/1880606503) |

## What reviewers say

### Lock Checker

[App page](https://appshunter.io/ios/app/lock-checker/id6757445763)

This utility app helps alleviate the anxiety of forgetting if you locked your car. It uses a deliberate confirmation process and allows you to save parking details and track your vehicle's lock status.

**Highlights:** Hold-to-confirm lock status, Save GPS parking location, Add parking spot photos, Multi-vehicle support, History log of lock events, Offline functionality

**Features:** macOS Compatibility

**In-app purchases:** none


### Centered Cardboard

[App page](https://appshunter.io/ios/app/centered-cardboard/id6759780836)

This app helps trading card collectors pre-grade their cards by analyzing centering and alignment. It uses your device's camera and visual tools to provide quick, consistent, and accurate feedback on card position and border spacing.

**Highlights:** Live centering feedback with color-coded indicators, Skewed measuring for rotated borders, Exact distances for border spacing, Gyro leveling crosshair, Outline guide overlays, Up to 100x zoom, Camera capture or photo import

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Centered Cardboard Pro | $4.99 | one-time |


## Frequently asked questions

### Is Lock Checker free?

Lock Checker costs $0.99, with no in-app purchases.

### Is Centered Cardboard free?

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

### Which has better reviews, Lock Checker or Centered Cardboard?

Lock Checker is rated higher. Lock Checker averages 5.0 out of 5 from 2 ratings, while Centered Cardboard averages 4.9 from 60 ratings.

### Do Lock Checker or Centered Cardboard have ads?

Neither Lock Checker nor Centered Cardboard shows ads.

### Which is updated more often, Lock Checker or Centered Cardboard?

Lock Checker ships an update every 2 days, and Centered Cardboard every 3 weeks. Most recently, Lock Checker was updated on October 24, 2026 and Centered Cardboard 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.*