# Grade.IQ vs Centrd

The clearest difference is update cadence: Grade.IQ at every 4 days against Centrd's every 10 days. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Grade.IQ sells 3 in-app purchases, starting at $2.99 per month and Centrd sells 5 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Grade.IQ ships an update every 4 days, Centrd every 10 days. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Grade.IQ | Centrd |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 10 days |
| Size | 50 MB | 53 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [MARCUS WILSON HUGHES](https://appshunter.io/developer/1877077258) | [Justin Logan](https://appshunter.io/developer/6788557488) |

## What reviewers say

### Grade.IQ

[App page](https://appshunter.io/ios/app/gradeiq/id6759155592)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Grade Curious | $2.99 | per month |
| Grade Enthusiast | $5.99 | per month |
| Grade Obsessed | $9.99 | per month |


### Centrd

[App page](https://appshunter.io/ios/app/centrd-card-centering-tool/id6788557486)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Centrd Premium | $3.99 | per month |
| Centrd Premium (Yearly) | $29.99 | per year |
| Supporter | $1.99 | one-time |
| Big supporter | $4.99 | one-time |
| Generous supporter | $9.99 | one-time |


## Frequently asked questions

### Is Grade.IQ free?

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

### Is Centrd free?

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

### Do Grade.IQ or Centrd have ads?

Neither Grade.IQ nor Centrd shows ads.

### Which is updated more often, Grade.IQ or Centrd?

Grade.IQ ships an update every 4 days, and Centrd every 10 days. Most recently, Grade.IQ was updated on October 28, 2026 and Centrd on October 25, 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.*