Proof Authentication vs Ding Detect
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Proof Authentication
Verify product authenticity instantly by scanning official security marks. Ensure your purchases are genuine with rapid and accurate authentication. Look for the Proof Security Mark on select consumer goods.
- Instant product authentication
- Scan Official Proof Security Marks
- High accuracy verification
- Fast results
- Supports selected consumer items
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Proof allows you to authenticate the products you buy with unprecedented speed and accuracy. By simply holding the Proof App over any Official Proof Security Mark you will know within seconds that the product you have purchased is 100% authentic. Look for the Proof Security Mark on selected consumer items.
Ding Detect
Instantly measure the centering of trading cards using your phone. Get estimated grade tiers from major grading companies and track your collection strategy. Export and share your results.
- Centering analysis for front and back
- Grade predictions for major companies
- Customizable guide controls
- Scan history tracking
- Dashboard performance stats
- Export and share results
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DingDetect – Card Centering Checker Know your centering before you submit. DingDetect lets you measure the centering of your trading cards in seconds and instantly see how your card stacks up against PSA, BGS, CGC, ACE, and TAG grading standards — right from your phone. Whether you're deciding which cards are worth submitting or building a collection strategy, DingDetect gives you the data you need before spending on grading fees. HOW IT WORKS Take a photo or upload from your gallery, align the guide lines to your card's borders, and DingDetect calculates the top, bottom, left, and right centering percentages. Results are mapped instantly against published grading standards so you can see your estimated grade tier for each company at a glance. FEATURES • Centering analysis for front and back of any card • Grade predictions for PSA, BGS, CGC, ACE, and TAG • Draggable guide tabs or edge sliders — choose the control style that works for you • Scan history to track and revisit every card you've checked • Dashboard stats showing total scans and per-company centering performance over time • Customizable settings — show only the grading companies you care about • Export and share your centering results as an image COMING SOON Ding Detect — AI-powered surface scanning to automatically identify dings, scratches, and print defects before you submit. FREE & PRO DingDetect is free to try with 2 scans per day. Upgrade to Pro for unlimited scans, sharing, and full access to all features. DingDetect is an independent app and is not affiliated with PSA, BGS, CGC, ACE, TAG or any other grading company. Centering estimates are based on publicly available grading standards and are for reference purposes only. Actual grades may vary.
Screenshots
Verdict
The clearest difference is review sentiment: Ding Detect at 100% against Proof Authentication's 50%. Ding Detect also leads on rating (5.0 vs 4.4) and update cadence (every 2 weeks vs every 2 months). Proof Authentication's advantage is in-app purchases (none vs 1) and ratings volume (7 vs 2). On price, ads, device support and iOS requirement 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
Both are free to download. Ding Detect sells 1 one-off in-app purchase. Proof Authentication asks for nothing beyond the download.
Ding Detect holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 7 and 2 respectively. Written reviews point the same way: 50% of Proof Authentication's written reviews are positive against 100% of Ding Detect's.
Proof Authentication ships an update every 2 months, Ding Detect every 2 weeks. The most recent releases landed on September 8, 2026 and September 22, 2026 respectively.
| Parameter | Proof Authentication | Ding Detect |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (7 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 50.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 7 — better | 2 |
| Update frequency | Every 2 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 14.4 — better | 15.5 |
| Further details — not scored | ||
| Size | 76 MB | 66 MB |
| Age rating | 4+ | 4+ |
| Developer | Proof Authentication Corporation | Techcave, LLC |
Customer experience
Proof Authentication
Ding Detect
In-app purchases
Proof Authentication
No in-app purchases
Ding Detect
- Card Centering Tool$3.99
Questions
Is Proof Authentication free?
Is Ding Detect free?
Which has better reviews, Proof Authentication or Ding Detect?
Do Proof Authentication or Ding Detect have ads?
Which is updated more often, Proof Authentication or Ding Detect?
Other comparisons
