# Prism vs Proref

The clearest difference is iOS requirement: Proref at 15.0 against Prism's 18.6. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Prism sells 2 in-app purchases, starting at $2.99 per month and Proref sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Prism ships an update weekly, Proref every 6 days. The most recent releases landed on October 21, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Prism | Proref |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 6 days** |
| Size | 6 MB | 44 MB |
| Requires iOS | 18.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Maria Camila Storck](https://appshunter.io/developer/6777137719) | [John Oliver Atienza](https://appshunter.io/developer/1526037866) |

## What reviewers say

### Prism

[App page](https://appshunter.io/ios/app/prism-color-studio/id6777137717)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Prism Pro | $2.99 | per month |
| Prism Pro | $17.99 | per year |


### Proref

[App page](https://appshunter.io/ios/app/proref-art-reference-boards/id6802284370)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Proref Pro | $7.99 | one-time |


## Frequently asked questions

### Is Prism free?

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

### Is Proref free?

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

### Do Prism or Proref have ads?

Neither Prism nor Proref shows ads.

### Which is updated more often, Prism or Proref?

Prism ships an update weekly, and Proref every 6 days. Most recently, Prism was updated on October 21, 2026 and Proref on October 19, 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.*