# Centered Cardboard vs Gradeon

The clearest difference is ads: Centered Cardboard at none against Gradeon's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Centered Cardboard sells 1 one-off in-app purchase and Gradeon sells 6 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

Centered Cardboard ships an update every 3 weeks, Gradeon every 2 weeks. The most recent releases landed on October 17, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Centered Cardboard | Gradeon |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (40 ratings)](https://appshunter.io/ios/app/centered-cardboard/id6759780836/reviews)** | — |
| Number of ratings | **40** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 18 MB | 79 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Oak Labs Limited Liability Company](https://appshunter.io/developer/1880606503) | [Federico Vietti](https://appshunter.io/developer/1888004574) |

## What reviewers say

### 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 |


### Gradeon

[App page](https://appshunter.io/ios/app/gradeon/id6761143702)

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Gradeon Pro Monthly | $7.99 | per month |
| Gradeon Pro Yearly | $69.99 | per year |
| 2 Scan Tokens | $1.99 | one-time |
| 5 Scan Tokens | $3.99 | one-time |
| 15 Scan Tokens | $9.99 | one-time |
| 50 Scan Tokens | $22.99 | one-time |


## Frequently asked questions

### Is Centered Cardboard free?

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

### Is Gradeon free?

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

### Do Centered Cardboard or Gradeon have ads?

Gradeon shows ads; Centered Cardboard does not.

### Which is updated more often, Centered Cardboard or Gradeon?

Centered Cardboard ships an update every 3 weeks, and Gradeon every 2 weeks. Most recently, Centered Cardboard was updated on October 17, 2026 and Gradeon on October 10, 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.*