# Card Centering Tool vs ShelfPulse

The clearest difference is rating: ShelfPulse at 4.9 against Card Centering Tool's 4.6. Card Centering Tool's advantage is update cadence (every 2 days vs weekly) and device support (3 vs 1). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Card Centering Tool sells 3 in-app purchases, starting at $3.99 per 7 days and ShelfPulse sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

ShelfPulse holds the better App Store score, 4.9 against 4.6. Both are backed by a comparable volume of ratings — 19 and 9 respectively.

Card Centering Tool ships an update every 2 days, ShelfPulse weekly. Both last shipped on October 24, 2026.

## The numbers

| Metric | Card Centering Tool | ShelfPulse |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (19 ratings)](https://appshunter.io/ios/app/card-centering-tool-grader-ai/id6751784546/reviews) | **[4.9 (9 ratings)](https://appshunter.io/ios/app/shelfpulse/id6754263899/reviews)** |
| Number of ratings | **19** | 9 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Weekly |
| Monetization | Free with in-app purchases | Freemium |
| Size | 38 MB | 8 MB |
| Requires iOS | **15.1** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | +4 | 4+ |
| Developer | [faisal khalid](https://appshunter.io/developer/671706631) | [Eric Randall](https://appshunter.io/developer/1807554805) |

## What reviewers say

### Card Centering Tool

[App page](https://appshunter.io/ios/app/card-centering-tool-grader-ai/id6751784546)

This tool helps collectors accurately measure card centering ratios for sports and trading cards. It provides precise measurements against professional grading standards and offers customizable viewing options for a better collecting experience.

**Highlights:** Manual centering measurement, Front & back ratio analysis, Grading reference library, Customizable viewing options, Visual ratio previews, Supports all card types

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly - Card Centering App | $3.99 | per 7 days |
| Yearly - Card Centering Tool | $29.99 | per year |
| Lifetime - Card Grading | $7.99 | one-time |


### ShelfPulse

[App page](https://appshunter.io/ios/app/shelfpulse/id6754263899)

Monitor your Audiobookshelf server with real-time dashboards, deep listening analytics, and library insights. Manage users, view beautiful home screen widgets, and gain personal or administrative perspectives on your audiobook collection. Enjoy a privacy-first experience with direct server connection.

**Highlights:** Real-time session monitoring, Deep listening analytics, Library and server insights, User management, Home screen widgets, Direct server connection

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ShelfPulse Monthly | $0.99 | per month |
| Full Access | $9.99 | one-time |


## Frequently asked questions

### Is Card Centering Tool free?

Card Centering Tool is free to download, with in-app purchases available.

### Is ShelfPulse free?

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

### Which has better reviews, Card Centering Tool or ShelfPulse?

ShelfPulse is rated higher. Card Centering Tool averages 4.6 out of 5 from 19 ratings, while ShelfPulse averages 4.9 from 9 ratings.

### Do Card Centering Tool or ShelfPulse have ads?

Neither Card Centering Tool nor ShelfPulse shows ads.

### Which is updated more often, Card Centering Tool or ShelfPulse?

Card Centering Tool ships an update every 2 days, and ShelfPulse weekly. Most recently, Card Centering Tool was updated on October 24, 2026 and ShelfPulse on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*