Comparison

Centering Check vs keepbin

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Centering Check

This tool uses AI to accurately measure the centering of trading cards from photos or screenshots. It provides instant grade estimates for major grading companies and allows for manual adjustments and sharing of results. Evaluate online listings and your own collection with confidence.

Highlights
  • AI-powered image correction for accurate centering
  • Instant grade estimates for PSA, BGS, CGC, TAG
  • Manual border adjustment for precise measurements
  • Editable history of all scanned cards
  • Front and back centering calculations
  • Shareable images with centering data
  • Grading standards reference guide
Features
Read full description

Centering Check is your premium pocket-sized tool for measuring card centering with pixel-perfect precision and getting instant grade estimates. Simply snap a photo or upload a screenshot of an online listing. Instead of worrying about perfect camera angles, our custom AI Warp Method instantly transforms your image into a flat, bird's-eye view, fixing any perspective distortion automatically. You have complete control to ensure absolute accuracy by manually adjusting the borders, giving you a precise look at the card's true centering in seconds. Key Features: ◆ Evaluate Online Listings Instantly: Take a screenshot of any online listing and upload it directly. Our AI Warp Method removes the angle distortion and auto-detects all borders, letting you check if the card has a 10 centering subgrade before you even buy it. ◆ Batch Ranking: Select multiple photos or shoot cards one after another. Every card is measured, saved to your collection log, and ranked by centering in a single pass, so you find the grading candidates immediately. ◆ Pinch-to-Zoom: Zoom in on your card's edges to make pixel-perfect micro-adjustments before finalizing your measurements. ◆ Editable History: Every card you upload is automatically saved. Go back and review, edit, or compare past measurements anytime. ◆ Accurate Grade Estimates: Instantly see estimated centering grades tailored to the specific front and back thresholds of major grading companies: PSA, BGS, CGC and TAG. ◆ Front & Back Support: Easily toggle between front and back calculations to get a complete picture of your card's centering quality. ◆ Share Your Pulls: Generate a sleek, shareable image of your card with its centering measurements and grade estimates overlaid - perfect for sharing with buyers, sellers, or your community. ◆ Grading Standards Reference: A dedicated section with the official centering thresholds for every supported grading company, so you know exactly what each grade requires. ◆ Zero Interruptions: Focus entirely on your card's centering without annoying pop-ups or banners. Stop wondering if your card is worth sending in for grading. Use Centering Check to evaluate your collection, prep your submissions, and buy or sell with confidence. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

keepbin

This app helps you declutter your photo library by presenting one image at a time for you to keep or delete. It prioritizes videos for maximum space recovery and ensures your photos never leave your device. All deletions are final only after your explicit confirmation.

Highlights
  • Random photo presentation
  • Swipe to keep or delete
  • Bin for recoverable deletions
  • Prioritizes video deletion
  • Offline functionality
  • No cloud upload
  • One-time deletion confirmation
Features
Read full description

You have nine thousand photos and a full phone. Opening the gallery and trying to pick doesn't work: there are too many, they all look important, and you end up closing it without deleting anything. keepbin turns the problem around. It shows you one photo, at random, full screen. All you have to do is decide about that one. Swipe right and you keep it. It never comes up again. Swipe left and it drops into the bin. NOTHING IS DELETED UNTIL YOU SAY SO The bin is just a waiting list. You can undo, close the app and come back tomorrow: what you binned is still there. When you have had enough, you empty it all at once, and that is where it actually gets deleted, with a single confirmation instead of forty. VIDEOS ARE WHAT TAKE UP ROOM A minute of 4K weighs more than three hundred photos. keepbin mixes them in with everything else, because they are the ones that will really give you your space back. YOUR PHOTOS NEVER LEAVE YOUR PHONE No accounts, no sign-up, no cloud. keepbin never uploads, copies or shares a single one of your photos. Nobody sees them: not us, not anyone. AN HONEST HEADS-UP When you delete, iOS keeps the photos for another 30 days under "Recently Deleted". You can restore them during that time, but the space is not quite yours yet. The app tells you this before and after deleting, because we would rather warn you than promise you space you don't have yet. FREE, AND NOTHING ELSE No ads, no subscriptions, no in-app purchases. In English and Spanish. Works offline.

Screenshots

Centering Check4 screens
keepbin4 screens

Verdict

The call

The clearest difference is review sentiment: keepbin at 100% against Centering Check's 0%. keepbin also leads on in-app purchases (none vs 3) and rating (5.0 vs 4.6). Centering Check's advantage is ratings volume (51 vs 2) and device support (3 vs 1). On price, update cadence, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Centering Check sells 3 in-app purchases, starting at $3.99 per month. keepbin asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

keepbin holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Centering Check has 51 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 0% of Centering Check's written reviews are positive against 100% of keepbin's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 21, 2026 and October 3, 2026 respectively.

Scorecard6 real differences · 4 level
Centering Check versus keepbin: the parameters behind the verdict, then further details
ParameterCentering Checkkeepbin
PriceFreeFree
Rating4.6 (51 ratings)5.0 (2 ratings) — better
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings51 — better2
Update frequencyEvery 2 weeksEvery 2 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.1 — better16.4
Further details — not scored
Size47 MB40 MB
Age rating4+4+
DeveloperGiosue CastellanoJuan Martin

Customer experience

Centering Check

All ratings42 ratings
Positive90.5%
Neutral2.4%
Negative7.1%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

keepbin

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

Centering Check

Subscriptions2
  • Monthly Centering Check PRO1 Month trial$3.991 Month
  • Yearly Centering Check PRO$39.991 Year
One-time1
  • Lifetime Subscription PRO$99.99
None

keepbin

No in-app purchases

Questions

Is Centering Check free?
Centering Check is free to download, with in-app purchases available.
Is keepbin free?
keepbin is free to download, with no in-app purchases.
Which has better reviews, Centering Check or keepbin?
keepbin is rated higher. Centering Check averages 4.6 out of 5 from 51 ratings, while keepbin averages 5.0 from 2 ratings.
Do Centering Check or keepbin have ads?
Neither Centering Check nor keepbin shows ads.
Which is updated more often, Centering Check or keepbin?
Centering Check ships an update every 2 weeks, and keepbin every 2 weeks. Most recently, Centering Check was updated on October 21, 2026 and keepbin on October 3, 2026.

Other comparisons