# Eikonal vs Prism

The clearest difference is in-app purchases: Eikonal at none against Prism's 3. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Prism sells 3 in-app purchases, starting at $2.99 per month. Eikonal asks for nothing beyond the download.

## The numbers

| Metric | Eikonal | Prism |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 10 days |
| Size | 1 MB | 43 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kevin Hillabolt](https://appshunter.io/developer/1243774924) | [Chien-Yao Chang](https://appshunter.io/developer/1888986500) |

## What reviewers say

### Eikonal

[App page](https://appshunter.io/ios/app/eikonal/id6772383042)

**Features:** macOS Compatibility

**In-app purchases:** none


### Prism

[App page](https://appshunter.io/ios/app/prism-daily-light-puzzle/id6774577331)

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Prism Pro (Monthly) | $2.99 | per month |
| Prism Pro (Yearly) | $14.99 | per year |
| Prism Pro (Lifetime) | $29.99 | one-time |


## Frequently asked questions

### Is Eikonal free?

Eikonal is free to download, with no in-app purchases.

### Is Prism free?

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

### Do Eikonal or Prism have ads?

Neither Eikonal nor Prism shows ads.

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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.*