Lock Checker vs Centered Cardboard
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Lock Checker
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.
- Hold-to-confirm lock status
- Save GPS parking location
- Add parking spot photos
- Multi-vehicle support
- History log of lock events
- Offline functionality
Read full descriptionHide full description
Did you lock the car? Now you’ll know for sure. Lock Checker is the focus-driven tool designed to eliminate locking anxiety. It acts as your digital memory, using a deliberate "Hold-to-Confirm" interaction to ensure you consciously secure your vehicle. Key Features: Intentional Confirmation: A 2-second hold prevents accidental taps and builds reliable habits. Smart Parking: Save your GPS location, a photo of your spot, and notes (e.g., "Level 2"). Multi-Vehicle Support: Track status for your daily driver or family cars. History Log: View a detailed timeline of when you locked your vehicle. Privacy First: Works fully offline. Your data stays locally on your device. Stop guessing. Start checking. Download Lock Checker today.
Centered Cardboard
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.
- 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
Read full descriptionHide full description
Centered Cardboard helps you pre-grade trading cards by making centering, alignment, and corner assessment quick, consistent, and easy to understand. Use your camera or import photos to examine cards with clear visual tools designed for accuracy: • Live centering feedback with color-coded ratios • Grading score estimates based on leading grading-company standards • Corner Grading for recording all four front and back corners • Tilted Measuring for cards with rotated inner borders • True Distance measurements for exact border spacing • Adjustable outline guides for accurate card alignment • Gyro crosshair and calibration tools for level camera positioning • Photo filters that improve edge visibility in difficult lighting • Up to 100× zoom for precise positioning and fine adjustments • Camera, Photos, and Files image support • Separate or combined front and back scores • Side-by-side exports for sharing both sides in one image • Cardboard History for saving, searching, editing, and revisiting exports locally • One-tap sharing for quickly saving or sending results Centered Cardboard gives collectors a clear, repeatable way to inspect cards before submitting them for grading. Centered Cardboard is an independent tool and is not affiliated with or endorsed by any card-grading company. Results are estimates and do not guarantee an official grade.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Lock Checker | Centered Cardboard |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 5.0 (2 ratings) — better | 4.9 (60 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 2 | 60 — better |
| Update frequency | Every 2 days — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 35 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Hrachya Harutyunyan | Oak Labs Limited Liability Company |
Customer experience
Lock Checker
Centered Cardboard
In-app purchases
Lock Checker
No in-app purchases
Centered Cardboard
- Centered Cardboard Pro$4.99
Questions
Is Lock Checker free?
Is Centered Cardboard free?
Which has better reviews, Lock Checker or Centered Cardboard?
Do Lock Checker or Centered Cardboard have ads?
Which is updated more often, Lock Checker or Centered Cardboard?
Other comparisons
